pooling clause

Can I Drill Through Unleased Federal Lands?

As horizontal wells and larger spacing units become the norm, the question often arises how to deal with an unleased federal tract in the proposed drilling unit.  Generally, you cannot drill through and produce from an unleased tract of land that is entirely or partially owned by the United States, but there are some options available. 

Can I include unleased federal lands in my drilling unit if I don’t penetrate that tract?

Yes, there is precedent where drilling units have been approved and operators have drilled horizontal wells that come close to the boundary of an unleased federal tract, but do not actually penetrate the unleased federal tract.  The BLM Manual and the BLM Handbook specifically provide that a communitization agreement (CA) can be approved with unleased federal lands if there is at least one other leased tract (federal, state, fee, or Indian), there is a well producing in paying quantities, and it would be a long delay (i.e., more than six months) in leasing the unleased federal lands (or presumably if the unleased federal lands are not available for lease).[1]

In regard to the well producing in paying quantities requirement, we note there is nothing in the federal statutes or regulations requiring a producing well.  We suspect this requirement exists to determine the well drainage and spacing unit for the lands.  If a drilling unit has already been established by the relevant state regulatory body, we do not believe a well producing in paying quantities should be required for approval of a CA with unleased federal lands.  The BLM Manual and Handbook also direct that any unleased federal lands should be leased as soon as possible.  Any lease subsequently issued will be subject to the successful bidder joining the CA or otherwise showing why joinder should not be required.[2]  

If the unleased federal lands are committed to a CA, an interest-bearing account is established and 8/8ths of all proceeds attributable to the unleased federal lands are to be placed  in the account.  Once the tract is leased, the suspended proceeds will be settled with the successful bidder.  In lieu of leasing an unleased federal tract, a compensatory royalty agreement (CRA) for small tracts of unleased lands may also be negotiated.[3]  The BLM has specific procedures in place for this situation, which require an unleased lands account to be established for any unleased lands.  The CRA must be executed by the United States and all adjoining interest owners in lands draining the unleased federal lands. The royalty rate will typically be the same as the rate for a competitive lease.

Unfortunately, there is no precedent that commitment of the unleased federal lands to a CA and/or CRA gives the operator the right to drill into and produce from the unleased federal lands.  There is a potential argument that the BLM’s approval of the CA commits the unleased federal lands to the CA and provides the operator of the CA with full access to all the communitized lands (including drilling on and through the unleased federal lands), but there is no guidance on this point. 

What if I drill through, but don’t produce from unleased federal lands?

Yes, it is possible to drill through unleased federal lands so long as they are not perforated or otherwise produced from.  This is because, when it comes to federal miners, there is a distinction between subsurface trespass (drilling through but not producing from unleased federal minerals) and mineral trespass (drilling through and producing from unleased federal minerals).  It should be noted that the penalties for mineral trespass against the United States can be quite severe.[4] 

Although there is a split in jurisdictions (and even inconsistency within certain jurisdictions) as to the ownership of the pore space after the severance of the surface and mineral estates, the BLM generally defers to the surface owner for approval to drill through (but not produce from) unleased federal lands.  The BLM will not typically assert any approval authority in this situation unless the federal minerals are at risk of harm or interference.[5]  However, a prudent operator may seek a subsurface access agreement from the BLM (even if it is not ultimately granted) to at least notify the BLM of the proposed operations in an effort to protect itself from the risk of subsurface trespass.  In some states, when an APD is filed, the state’s oil and gas commission will either send notice or require the operator to send notice to the BLM when federal lands are involved.

What if the tract is only partially unleased federal minerals?

Generally, whether or not federal or state law controls when dealing with federal minerals is a difficult question to answer.[6]  When the subject involves the disposition or development of federal minerals, state regulatory authorities generally have no jurisdiction or authority.[7]  Specifically, scholars believe that Congress has the ability to preempt conservation regulations under the Supremacy Clause or the Commerce Clause of the Constitution or state regulation of federal lands under the Property Clause of the Constitution.[8] 

As a result, it is not clear whether traditional remedies available for a co-tenant (e.g., compulsory pooling) apply to minerals owned in part by the United States.  On one hand, a private party attempted to force pool unleased federal minerals and a federal court found that compulsory pooling of federal lands could not be done without the Secretary’s consent, essentially requiring a communitization agreement.[9] On the other hand, courts have found that lands reacquired by the United States are subject to state law.[10]  

Furthermore, if the unleased federal minerals are committed to a CA, it would be difficult to argue that development of the unleased federal minerals is a mineral trespass because the Secretary consented to the pooling and development of the unleased federal minerals by approving the CA.  Unfortunately, we have not been able to identify a situation where an operator has attempted to develop a partially-owned unleased federal tract as a co-tenant. 

In the event an operator is actually successful at developing a tract with partially federal minerals, a CA will need to be approved and an interest-bearing account will be established as discussed above.


[1] BLM Manual 3160-9 Communitization, .1.11.H.;  BLM Handbook 3105-1 Cooperative Conservation Provisions, Section II.A. 

[2] It is uncertain whether the latter is actually possible due to the fact that a lease within a CA cannot be independently developed. 

[3] 43 C.F.R. § 3100.2-1.

[4] In assessing the penalty for mineral trespass of federal minerals, the BLM will first look to state law governing oil trespass to measure damages.  If the state where the trespass occurred has no law governing oil trespass, the BLM’s assessment of damages will depend on whether the trespass was “innocent” or “willful.”  For innocent trespass, BLM will measure damages based on the value of oil taken, less expenses of “taking” the oil (i.e., drilling costs).  For willful trespass, the BLM will measure damages based on the “[v]alue of the oil taken without credit or deduction for the expense incurred by the wrongdoers in getting it.”  The BLM’s trespass regulations do not address measurement of damages from gas trespass, but generally state that it will measure damages for “other trespass” based on the laws of the state in which the trespass occurred.  See, generally, Kathleen C. Schroder & William Lambert, “Permitting and Trespass Issues Associated with Horizontal Development on Federal Lands and Minerals,” 62 Rocky Mt. Min. L. Inst. 12-1 (2016).

[5] See U.S. Government Accountability Office, Oil and Gas: Updated Guidance, Increased Coordination, and Comprehensive Data Could Improve BLM’s Management and Oversight, GAO-14-234, Published May 5, 2014, Reissued May 16, 2014.

[6] In the astute words of Professor Bruce M. Kramer, “The rules are in flux, which makes it an exciting time for academics and a difficult time for those providing legal advice to oil and gas explorers and producers.”

[7] Kleppe v. New Mexico, 456 U.S. 529, 540 (1976); Kennedy & Mitchell, Inc. 68 IBLA 80, 83 (1982) (finding “Congress has preempted from the state regulation of communitization or drilling agreements affecting Federal oil and gas leases . . . [U]ntil [a] communitization agreement [is] approved . . . each Federal oil and gas lease . . . [has] to stand by itself”).

[8] Owen L. Anderson, “State Conservation Regulation – Single Well Spacing and Pooling – Vis-à-vis Federal and Indian Lands,” Federal Onshore Oil and Gas Pooling and Unitization, 2-12 (Rocky Mt. Min. L. Fdn. 2006).

[9] Kirkpatrick Oil & Gas Co. v. United States, 675 F.2d 1122, 1125 (10th Cir. 1982) (holding “no state-ordered forced pooling would bind the government without the Secretary’s consent”).  It appears that obtaining a CA may be the more practical approach because the BLM Manual instructs that, in this situation, the operator should submit a copy of the state order force pooling the interest with the CA and the CA will be approved if executed by the operator and complete in all other respects.

[10] See Mallon Oil Co., 104 IBLA 145, 150 (1988) (applying Montana law as to the ownership of the subsurface to find the United States owns both the surface and subsurface of acquired lands located in Montana.

How Are Federal Oil and Gas Leases Pooled and Unitized?

In the context of federal oil and gas leases, the terms “communitization” and “unitization” are distinct concepts which are subject to different statutes, regulations, and procedures. As such, the method to “communitize” a federal oil and gas lease is different than the process used to “unitize” such leases. These respective differences are highlighted herein.

Communitization of Federal Oil and Gas Leases

Virtually all oil and gas producing states have promulgated minimum acreage requirements for the drilling of oil or gas wells.[1]  The United States recognized the importance of state conservation statutes, and accordingly passed an amendment to the Mineral Leasing Act which allowed federal lessees to conform to state well spacing orders through a communitization agreement.[2]  Communitization is the agreement to combine small tracts, of which one or more is federal or Indian lands, for the purpose of committing enough acreage to form the spacing/proration unit necessary to comply with the applicable state conservation requirement and to provide for the development of these separate tracts which cannot be independently developed in conformity with said conservation requirements.[3] In essence, communitization is the federal equivalent of pooling the lands in a spacing/proration unit under state law.  The common thread of all federal communitization agreements is that at least one federal or Indian lease or tract must be involved.[4]  That federal or Indian lease is communitized with other leases that may be federal, Indian, state, or fee.[5]

Although there is no prescribed form for a federal communitization agreement in the regulations, the regulations do require that certain information be included within the communitization agreement.  There are relatively few requirements for communitization agreements, but the applicant must usually provide sufficient information so the authorized officer can make a determination that it would be in the best interests of conservation and of the United States for the federal leasehold to be communitized.[6]  Specifically, the agreement must describe the separate tracts comprising the drilling or spacing unit, describe the apportionment of production or royalties to the parties, name the operator, contain adequate provisions for the protection of the interests of the United States, be filed prior to the expiration of the federal leases involved, and be signed by or on behalf of all necessary parties.[7]  The BLM Manual 3160-9-Communitization includes a standard or model communitization agreement form, one for federal leases and one for Indian leases, which should be used whenever possible.[8]

The necessary parties include all working interest owners and lessees of record. A communitization agreement may be approved without joinder by the royalty, overriding royalty, and production payment interest owners, but this will result in different payment scenarios depending upon the location of a successfully completed well.[9]

 If a state has them, the state’s compulsory pooling statutes may be utilized to commit a nonconsenting party’s interest to the communitization agreement; although, without the consent of the Secretary of the Interior, the state commission does not have jurisdiction to force pool unleased interests of the United States.[10]  Copies of any compulsory/force pooling order should be furnished with and be part of the communitization agreement if such interest owner does not execute the agreement.[11]  The authorized officer in the appropriate BLM office must approve, on behalf of the Secretary, the communitization agreement with respect to any included federal leases.[12]

Although not mandatory, the filing of a Preliminary Application for Approval to Communitize is recommended, particularly in instances where the model form of communitization agreement is not followed precisely.[13]  The BLM Manual provides that a request for preliminary approval to communitize may be filed at any time with the authorized officer. It is also recommended that preliminary approval be requested if there is some doubt as to whether the proposed tracts are logically subject to communitization, or if there is any doubt as to whether a communitization of multiple zones will be approved. The preliminary approval procedure will expedite final approval and may avoid the necessity of extensive revisions and re-execution of a finalized communitization agreement.[14]

The BLM will not approve an agreement that purports to communitize all horizons from the surface down to the center of the earth.[15] However, if it is anticipated that the well will be completed in multiple formations, it is important to include all formations and horizons that are producing or may produce hydrocarbons intended to be allocated pursuant to the terms of the communitization agreement.[16]  All communitized formations must be subject to the same spacing requirements and, where multiple and clearly distinct formations are covered by the same communitization agreement, the BLM Manual provides that Section 1 be amended to clearly state that the agreement shall apply separately to each formation as though a separate communitization agreement for each formation had been executed.[17]  In the event a proposed well is projected to test multiple formations that are subject to different spacing requirements, separate communitization agreements should be submitted to BLM for each formation or set of formations with the same spacing requirements.[18]

The communitization agreement must be filed prior to the expiration of the federal leases to be communitized.[19]  The regulations require that the communitization agreement be filed in triplicate with the proper BLM office.[20]  If state lands are involved one additional counterpart must be submitted.

An executed counterpart of the approved communitization agreement, duly acknowledged, should be filed of record in the county in which the land is located. When fee leases are involved, the operator should record either the communitization agreement or otherwise comply with the terms of the pooling provision of any fee lease.[21]

In order to approve a communitization agreement, the Mineral Leasing Act requires that the Secretary determine communitization is “in the public interest”[22]:

The public interest requirement for an approved communitization agreement shall be satisfied only if the well dedicated thereto has been completed for production in the communitized formation at the time the agreement is approved or, if not, that the operator thereafter commences and/or diligently continues drilling operations to a depth sufficient to test the communitized formation or establish to the satisfaction of the authorized officer that further drilling of the well would be unwarranted or impracticable.”[23]

Communitization agreements usually provide for a term of two years and so long thereafter as communitized substances are, or can be, produced from the communitized area in paying quantities.[24]  Assuming the public interest requirement is satisfied, any federal lease eliminated from an approved communitization agreement, or any federal lease in effect at the termination of the agreement, shall continue in effect for the original term of the federal lease or for two years after its elimination from the plan or termination of the agreement, whichever is longer, and for so long thereafter as oil or gas is produced in paying quantities.[25]  No lease shall be extended if the public interest requirement has not been satisfied.[26]

Unitization of Federal Oil and Gas Leases

Unitization is the agreement to jointly operate an entire producing reservoir or a prospectively productive area of oil and/or gas. The entire unit area is operated as a single entity, without regard to lease boundaries, and allows for the maximum recovery of production from the reservoir. Costs are reduced because the reservoir can be produced by utilizing the most efficient spacing pattern, separate tank batteries are not necessary, and there is no requirement to drill unnecessary offset wells. The objective of unitization is to provide for the unified development and operation of an entire geologic prospect or producing reservoir so that exploration, drilling, and production can proceed in the most efficient and economical manner by one operator.[27]

The Bureau of Land Management is the administering agency for federal onshore units and has established procedures that must be followed to unitize federal lands.[28] Although not required by the regulations, the BLM strongly encourages an informal discussion with the authorized officer of BLM office having jurisdiction over the area where the lands are located concerning the proposed area of the unit, the depth of the test well and formation to be tested, and the form of agreement.[29]  This should be done prior to filing of an application.[30] It is recommended that this is done in order to ensure the unit approval process moves smoothly.

BLM regulations provide that,  to initiate the formation of a federal unit, an application for designation of a proposed unit area be filed in duplicate.[31] The application must be accompanied by a map or diagram outlining the area sought to be designated and indicating the federal, state, privately owned, or Indian lands by symbols or colors.[32]  The plat must indicate the separate leasehold interests involved and identify them by serial number in the case of federal and Indian oil and gas leases.[33]  It is advisable to show the ownership and expiration dates of each lease involved. The application must also be accompanied by a geologic report and it must indicate the zones that are to be unitized (if all zones or formations are not to be included).[34]

The owners of any interest in the oil and gas deposits to be unitized are proper parties to the unit agreement. All such parties must be invited to join the agreement.[35] This includes royalty owners and holders of overriding royalty interests and any other non-cost bearing interests in production, as well as working interest owners. Prior to approval, notice of the proposed agreement must be given to all parties with a request to join the agreement.[36]  When state lands are to be unitized with federal lands, the unit agreement must be approved by the state prior to submission to the BLM for final approval.[37]

After the unit area has been designated and the unit agreement has been fully executed by the parties desiring to commit their interests to the unit, a minimum of four signed counterparts must be filed for approval with the proper BLM office.[38]  These instruments should be accompanied by a request from the proponent for final approval of the unit, setting forth the acreage interests fully committed, effectively committed, partially committed, and not committed and show the percentage in each category.[39]  A showing must also be made that all parties owning not committed interests within the unit area have been extended an invitation to join in the unit agreement and that a reasonable effort has been made to obtain the joinder of all such parties.[40]  The request for final approval must include a list of the overriding royalty interest owners who have executed or ratified the unit agreement.[41] A tract will be considered “fully committed” if all interest owners have joined the unit and all working interest owners have also executed the applicable operating agreement.[42] A tract will be considered “effectively committed” to the unit without joinder by overriding royalty interest owners and will be treated identically as a “fully committed” tract, but, will result in different payment scenarios depending upon the location of the successfully completed unit well.[43] A tract will be considered “partially committed” if less than all of the lessors/royalty interest owners have joined, or all operating rights owners of a federal lease have joined but the record title holder has not.[44]  Such partially committed tracts may be considered to be under the effective control of the unit operator, however, no unit benefits will accrue to the tract in the absence of actual operations on the partially committed tract or an allocation of production to that tract either from a well on the tract or from another location.[45] Finally, if any working interest owner in a tract does not commit its interest, that tract is deemed “not committed.”[46]  BLM regulations provide that a unit agreement will not be approved “unless the parties signatory to the agreement hold sufficient interests in the unit area to provide reasonably effective control of operations.”[47] Generally, 85% of the tracts in the unit must be fully, effectively or partially committed to meet this “effective control” requirement.[48]

After four signed counterparts of the executed agreement are submitted, the authorized officer approves the unit agreement upon a determination that the agreement is necessary or advisable in the public interest and is for the purpose of more properly conserving natural resources.[49] A model federal onshore unit agreement for unproven areas (hereinafter “Model Form”) is included in the BLM regulations and promulgated to help implement these provisions.[50] Section 9 of the Model Form specifically provides for the commencement of an initial test well within six months after the effective date of the unit.[51] If a discovery is not made in the initial test well, provision is made for continuous drilling on unitized lands until a discovery is made provided that not more than six months elapse between the completion of one well and the commencement of the next.[52]  Paying quantities for purposes of meeting the drilling obligations in section 9 is defined as quantities of unitized substances sufficient to repay the costs of drilling, completing, and producing operations, with a reasonable profit.[53]

Upon approval, the unit agreement becomes effective.[54]  However, the public interest requirement is satisfied only if the unit operator commences actual drilling operations and diligently prosecutes such operations in accordance with the terms of the agreement.[55]  If this requirement is not satisfied, the approval of the agreement and lease segregations and extensions shall be invalid.[56]  Evidence of the approved unit should be recorded in the county records to impart notice.

Finally, it is important to understand the interplay between the unit agreement and the unit operating agreement because both agreements, taken together, constitute the unit arrangement and establish the contractual rights and obligations of the parties.

In addition to setting forth the terms and conditions for the unit, the unit agreement prescribes the method of allocating production for purposes of determining royalties, overriding royalties, production payments, and other non-cost bearing burdens, but does not dictate the working interest owners’ respective shares of production or the allocation of costs/royalty burdens associated therewith.[57] These, and other duties and obligations among the working interest owners, are matters covered by the unit operating agreement.[58]

The BLM does not prescribe any particular form of unit operating agreement and the working interest owners are generally free to use whatever form of unit operating agreement they prefer.[59] The unit operating agreement is entered into by the working interest owners who are committing their interests to the unit in conjunction with the execution of the unit agreement.[60] The interests of the royalty owners are not affected by the form of unit operating agreement chosen by the working interest owners.[61] Two copies of the unit operating agreement are required to be filed in the proper BLM office before the unit agreement will be approved.[62]


[1] Angela L. Franklin, Communitization Agreements in the 21st Century, Federal Onshore Oil and Gas Pooling and Communitization, Paper 3-4 (Rocky Mt. Min. L. Fdn. 2006) [hereinafter Communitization Agreements].

[2] See Mineral Leasing Act, Pub. L. No. 696, § 17(b), 60 Stat. 952 (1946).

[3] See 2 Lewis C. Cox, Jr., Law of Federal Oil and Gas Leases § 18.01 (2017).

[4] Communitization Agreements, supra note 2, at 3-5.

[5] Id.

[6] 1 Bruce M. Kramer & Patrick H. Martin, The Law of Pooling and Unitization § 16.04 (3rd ed. 2017).

[7] 43 C.F.R. § 3105.2-3(a) (2018).

[8] Communitization Agreements, supra note 2, at 3-5.

[9] Id.

[10] Id. at 3-6.

[11] Id.

[12] 43 C.F.R. § 3105.2-3 (2018).

[13] Communitization Agreements, supra note 2, at 3-7.

[14] See id.

[15] Id. at 3-8.

[16] Id.

[17] Bureau of Land Management, BLM Manual 3160-9-Communitization .11M (1988) [herein after BLM Manual].

[18] Communitization Agreements, supra note 2, at 3-8.

[19] 43 C.F.R. § 3105.2-3(a) (2018).

[20] Id. § 3105.2-1.

[21] Communitization Agreements, supra note 2, at 3-10.

[22] 30 U.S.C. § 226(m) (2018).

[23] 43 C.F.R. § 3105.2-3(c) (2018).

[24] See Section 10 of Model Form of a Federal Communitization Agreement in BLM Manual app.

[25] 43 C.F.R. § 3107.4 (2018). But see, R. E. Hibbert, 8 IBLA 379 (1972), GFS (O&G) 6 (1973).

[26] 43 C.F.R. § 3107.4 (2018).

[27] Kramer & Martin, supra, § 18.01[2].

[28] Id. § 18.04[1].

[29] Kramer & Martin, supra, § 18.04[2].

[30] See id.

[31] 43 C.F.R. § 3183.2 (2018)

[32] Kramer & Martin, supra, § 18.04[3] (citing 43 C.F.R. §§ 3181.2, 3183.2).

[33] See id. § 18.04[3].

[34] See 43 C.F.R. § 3181.2 (2018).

[35] 43 C.F.R. § 3181.3 (2018).

[36] See Kramer & Martin, supra, § 18.04[4].

[37] 43 C.F.R. § 3181.4(a) (2018).

[38] 43 C.F.R. § 3183.3 (2018).

[39] See Kramer & Martin, supra, § 18.04[6].

[40] Id. (citing 43 C.F.R. § 3181.3).

[41] See Kramer & Martin, supra, § 18.04[6].

[42] See Frederick M. MacDonald, Preparing and Finalizing the Unit Agreement: Making Sure Your Exploratory Ducks are in a Row, Federal Onshore Oil and Gas Pooling and Communitization, Paper 8-23 (Rocky Mt. Min. L. Fdn. 2006).

[43] Id. at 8-24.

[44] Id.

[45] Id.

[46] Id. at 8-25.

[47] 43 C.F.R. § 3183.4(a) (2018)

[48] MacDonald, supra, at 8-16.

[49] See Kramer & Martin, supra, § 18.04[6]. (citing 43 C.F.R. § 3183.4).

[50] See Thomas W. Clawson, Paying Well Determinations, Federal Onshore Oil and Gas Pooling and Communitization, Paper 11-3 (Rocky Mt. Min. L. Fdn. 2006).

[51] See Model Form, § 9, 43 C.F.R. § 3186.1.

[52] See Kramer & Martin, supra, § 18.03[2][b][iii].

[53] Model Form, § 9, 43 C.F.R. § 3186.1.

[54] Kramer & Martin, supra, § 18.04[6] (citing Lario Oil & Gas Co., 92 IBLA 46, GFS(O&G) 54 (1986)).

[55] Kramer & Martin, supra, § 18.04[7].

[56] 43 C.F.R. § 3183.4(b) (2018).

[57] See Steven B. Richardson and Lynn P. Hendrix, The Unit Operating Agreement for Federal Exploratory Units, Oil and Gas Agreements: Joint Operations, Paper 13-3 (Rocky Mt. Min. L. Fdn. 2008).

[58] Id.

[59] Id. at 13-1.

[60] Id. at 13-3.

[61] Id.

[62] Id.

Unitizing the Lessor’s Interest: No, It’s Not the Same as Pooling

The terms “pooling” and “unitization” are often used interchangeably, but they have different meanings. Pooling is “the bringing together of small tracts sufficient for the granting of a well permit under applicable spacing rules,” while unitization is “the joint operation of all or some portion of a producing reservoir.”[1] While pooling and unitization are both used to prevent waste and protect correlative rights,[2] unitization works on a much larger scale, allowing an operator to maximize the amount of resources extracted from an entire field or reservoir, without regard to lease or property boundaries. Generally, the lessee of a fee (private) oil and gas lease is free to commit its working interest to the unit agreement, but the lessee can only commit the lessor’s interest through voluntary ratification, compulsory unitization, or a unitization clause. This article will focus specifically on the third option: the unitization clause in fee leases.

Unitization clauses (if included at all) generally follow two patterns. First, the unitization clause may be interwoven into the pooling clause. Second, the unitization clause may appear separately, often immediately following the pooling clause (we believe this to be the preferred method). There are typically four parts to a “standard” unitization clause.

Part One – When can the lessee unitize the lessor’s interest?

Example: Lessee shall have the right to unitize, pool, or combine all or any part of the leased premises with other lands in the same general area by entering into a cooperative or unit plan of development approved by any governmental authority.

The unitization clause should expressly grant to the lessee the authority to unitize the leased premises under a cooperative or unit plan of development. Depending on the type of unit being formed (for example, a federal exploratory unit or a state voluntary unit), the language should be broad enough to cover the proposed plan of development. Because the lessee may not know its future unitization plans at the time it negotiates a lease, the lessee should ensure that the unitization clause is broad enough to cover all forms of unitization.[3]

Even with a unitization clause, the lessee has an implied duty of good faith and fair dealing when pooling or unitizing a fee oil and gas lease.[4] This means that the lessee should be careful when attempting to commit a lease that is about to expire or includes non-productive lands, or when the lessee’s economic interests are not aligned with those of the lessor. However, if the unit plan of development is approved by a governmental entity (such as the BLM or the state conservation commission), courts will generally defer to the government’s approval in determining whether the lessee acted in good faith.[5]

Unfortunately, when describing how the leased premises can be unitized with other lands, it is not uncommon to find combined pooling/unitization clauses where the lessee mistakenly used pooling language (such as “into a drilling or spacing unit in conformance with a state drilling or spacing order”) instead of replacing it with unitization language (such as “to one or more unit plans or agreements for the cooperative development or operation of one or more oil and/or gas reservoirs or portions thereof”).

Properly drafted unitization clauses should cover the development of a field or reservoir as opposed to just those lands within a single drilling or spacing unit.

Part Two – How will the terms of the lease be affected?

Example: When such a commitment is made, this lease shall be subject to the terms and conditions of the unit plan or agreement and this lease shall not terminate or expire during the life of such plan or agreement.

To effectively extend the lease under the unit plan of development, the lease terms should be amended to conform to those of the unit agreement. This can be done either by having the lessor ratify the unit agreement or by including express language to that effect (such as described above) in the unitization clause. This will ensure that the lease won’t expire while the operator of the unit is actively engaged in drilling operations under the unit agreement.

Conforming the lease to the unit agreement may not be the end of the analysis in terms of lease extension. Specifically, all or a portion of the leased premises could still expire if the lease contains a severance provision in the unitization clause or a separate Pugh clause. A severance provision in a unitization clause could result in lease expiration as to any non-unitized lands at the end of the primary term. For example:

Anything in this lease to the contrary notwithstanding, actual drilling on, or production from, any unit or units (formed by private agreement or by any State or Federal governmental authority, or otherwise) embracing both lands herein leased and other land, shall maintain this lease in force only as to that portion of Lessor’s land included in such unit or units, whether or not said drilling or production is on or from the leased premises.

Similarly, a Pugh clause could result in lease expiration as to any non-producing lands at the end of the primary term. For example:

Notwithstanding any provision to the contrary, this lease shall terminate at the end of the primary term or any extended term, as to all the leased land except those lands within a production or spacing unit prescribed by law or administrative authority on which is located a well producing or capable of producing oil and/or gas or lands on which Lessee is engaged in drilling or reworking operations.

The threat posed by either of these provisions requires careful review of the lease as a whole. Oftentimes, Pugh clauses are negotiated independently of the general lease terms and ultimately included on an addendum attached to the lease. As a result, they are not always consistent with the other terms of the lease. To avoid ambiguity, when negotiating a fee oil and gas lease, it is prudent to review any included Pugh clause (and all other lease terms) and consider how it will reconcile with the unitization clause. Ideally, the Pugh clause should only result in lease expiration as to those lands outside of an approved unit. However, at a minimum, the Pugh clause should be drafted (or amended) so as to not sever the lands within a unit production area (for example, a participating area in a federal exploratory unit).

Part Three – How will the lessor’s royalty interest be calculated?

Example: Where there is production on any particular tract of land covered by such plan, it shall be regarded as having been produced from the particular tract of land to which it is allocated and not to any other tract of land and the Lessor’s royalty interest shall be based upon production only as so allocated.

Generally, a pooling clause will allow the leased premises to be combined with other lands to form a drilling unit, wherein proceeds from production anywhere on the drilling unit are allocated according to the percentage of the acreage of each tract divided by the total acreage of the drilling unit. However, because units are concerned with the development of a field or reservoir, the unitization clause should provide that proceeds from production should only be allocated to that tract included in a unit production area (such as a participating area in a federal exploratory unit). In other words, if the lessor’s interest is properly committed to a cooperative or unit plan of development, production anywhere on the unit will hold the lease, but the lessor will only receive proceeds from production if its tract is included in a unit production area containing a producing well (not the drilling or spacing unit that would exist if the well was drilled outside of the unit).

So what happens if the lessee’s working interest is committed to the unit agreement, but the lessor’s royalty interest is not? While the lessee will be allocated proceeds according to its proportionate share of the unit production area, the lessor will be allocated proceeds on a leasehold basis. This can result in a windfall either for the lessor or the lessee (compare the allocation of proceeds from the 1H and 2H wells in the diagram to the right, assuming 320 acre standup spacing units).

Part Four – How can the lessee commit the lessor’s interest?

Example: Lessor shall formally express Lessor’s consent to any cooperative or unit plan of development by executing the same upon request of Lessee.

The mechanism for the lessee to commit the lessor’s interest to a cooperative or unit plan of development varies depending on the unitization clause. Many unitization clauses allow the lessee to unilaterally commit the lessor’s interest by executing the unit agreement. In some cases, such unitization clauses require the lessee to record a memorandum of the unit agreement. Other unitization clauses, such as the example above, require the lessor to formally consent to the unit plan of development when requested by the lessee. This is typically done by executing a ratification of the unit agreement. In any event, the agency administering the unit (for example, the BLM for a federal exploratory unit) may need to confirm the commitment status of the fee lessor. As such, and to avoid a potential dispute down the road, the lessee may decide to obtain the lessor’s ratification of the unit agreement, even if the terms of the lease do not require it.

Unitization Clause Checklist:

  • ✓ Is there a unitization clause?
  • ✓ Does the unitization clause cover the proposed type of unit?
  • ✓ Does the unitization clause allow the leased premises to be combined with other lands for the development of a field or reservoir (as opposed to a single drilling unit)?
  • ✓ Does the unitization clause amend the lease terms to those of the unit agreement?
  • ✓ If there is a severance provision in the unitization clause, will it impact the proposed operations?
  • ✓ If the lease contains a Pugh clause, is it consistent with the unitization clause? Will it impact the proposed operations?
  • ✓ Does the unitization clause allocate proceeds from production within the unit production area (as opposed to a drilling or spacing unit)?
  • ✓ Will the proposed unitization plan be exercised in good faith?
  • ✓ If required, did the lessor execute a ratification of the unit agreement? Was it recorded?

[1] Williams & Meyers, The Law of Oil and Gas, § 8-U.
[2] In Utah, for example, correlative rights are defined as “the opportunity of each owner in a pool to produce his just and equitable share of the oil and gas in the pool without waste.” Utah Code Ann. § 40-6-2(2).
[3] See, e.g., Trans-Western Petroleum, Inc. v. U.S. Gypsum Co., 584 F.3d 988 (10th Cir. 2009).
[4] See, generally, Williams & Meyers, The Law of Pooling and Unitization § 8.06.
[5] See Amoco Prod. Co. v. Heimann, 904 F.2d 1405 (10th Cir. 1990).

Co-Authors
David Hatch and Andrew LeMieux

Practical Advice Regarding Pooling Clauses

Pooling is a fundamental concept within oil and gas law, but one that is often misunderstood. Pooling is most commonly defined as “the combining of two or more tracts of land into one unit for drilling purposes … accomplished voluntarily, or through compulsion.”1 In other words, it is how a lessee is able to extend a lease without physically drilling on the lease. For private (fee) oil and gas leases, the ability of the lessee to pool the lease is typically addressed in the lease provisions. These provisions are known as the pooling clause. This article provides some practical tips in dealing with the issues that arise from pooling clauses.

The first question that should be asked is if there is an existing spacing order in place for the lands and formation(s) involved. Many pooling clauses provide that the lease can only be pooled in conformity with a spacing order from the applicable state regulatory agency. If you encounter such a clause, you will need to check for a state spacing order, and if an order is not already in place, you will need to initiate the required steps to obtain an order. There may also be an order in place that does not match your proposed operation. If so, a new order would need to be obtained modifying the existing order. If spacing is governed by statewide spacing, you will want to double check the language in the pooling clause to confirm that statewide spacing is sufficient.

If the proposed well will be a horizontal well, there are special considerations that need to be addressed. Some lease provisions specifically address horizontal spacing. Many states have special statewide rules that are in place for horizontal wells. Particular attention should be paid to any total acreage limitation included in the pooling clause of the lease, for example, the lease cannot be included in a pooled unit for oil greater than 160 acres. If the lease has this limitation, an amendment to the lease may be the best option to eliminate this conflict.

The next question when reading a pooling clause is what role, if any, the lessor will have in the pooling process. The most common oil and gas lease terms allow the lessee to pool the lease without obtaining any additional consent from the lessor. In some cases, if the lessor desires to retain this right, they will strike out the pooling provision in the entirety, or add a specific lease provision requiring their consent. If the lease does not have a pooling clause, or if the pooling clause is stricken, the lease can only be pooled with the express consent of the lessor. This consent would be expressed by having the lessor execute a pooling agreement. The pooling agreement should be recorded to provide third parties with notice of the terms of the agreement. If obtaining consent is not an option, compulsory pooling by the governing state agency would be the alternative.

Some leases require that notice of the pooling be provided to the lessor in order for the pooling to be effective. If the pooling clause requires that notice be mailed to the lessor, an effort should be made to locate both the last address of record and a current address, utilizing online resources. If a more recent address is discovered, the notice should be mailed to both the address of record and the new address that was located. More commonly, the lease requires that for it to be properly pooled, a proper declaration of pooling needs to be executed and recorded by the lessee in the applicable county. Care should be taken in drafting the declaration of pooling. It should be signed by all parties owning a working interest in the lease. In order to be recorded, the signatures will need to be originals and it will need to be notarized. It should describe the specific lease(s) being pooled, including the recording information (Book/Page, Entry No.) for each lease. It should cite the authority to pool contained in the lease, for example: “Pursuant to Paragraph 10 of the lease.” It should define the pool, the total lands included and the formation(s) covered. If the lease covers more lands than what is being pooled, the declaration should describe all of the lands covered by the lease. This is particularly important in states that utilize a tract index recording system. If the pooling is in conformity with a state spacing order, it should be noted. If the party executing the declaration was not the original lessee, a statement as to the succession (Book/Page, Entry No. of the document transferring the interest in the lease) should be included. If the operator is drilling the well to earn an interest in the lease from another party, for example under a farmout agreement, it is recommended that the declaration be executed by both the record title owner and the party that is to earn the interest. Doing this would avoid any dispute as to the correct party to execute the declaration. Once executed, confirmation should be made that the declaration of pooling is properly recorded and, if it is a tract index state, that it is has been properly indexed against the lands.

Confirmation should be made that the effective date of the pooling is either the date of, or prior to the date, of first production. The effective date should also be prior to the termination date of the lease. Most lease provisions provide that the declaration of pooling must be prior to lease expiration. In the event the well was drilled prior to lease expiration, but the declaration of pooling was not timely recorded in order to avoid any issue, the lessor should execute a pooling declaration which includes a statement that the lease was properly pooled prior to the expiration date of the lease.

Finally, after reading the specific pooling provisions in the leases to be pooled, a broader examination of some additional issues raised by pooling the lease should be conducted. Confirmation should be made that all of the leases to be pooled are private leases. If the pool includes either federal, Indian, or state leases, additional steps will be needed to pool these leases. As to state leases, various state agencies have adopted different rules and procedures regarding private pooling agreements. As to federal and Indian leases, there are two ways to pool them: a federally approved unit or communitization agreement. The nuances of federal unitization and communitization will be further explored in a subsequent article in this series.


1 Patrick H. Martin and Bruce M. Kramer, Williams & Meyers, Oil and Gas Law § P Terms. (LexisNexis Matthew Bender 2016).