JurisdictionUnited States
Federal Onshore Oil & Gas Pooling & Unitization - part 1
(Oct 2014)


William A. Lambert
U.S. Bureau of Land Management, Fluid Minerals Division
Billings, Montana

[Page 6E-1]

WILLIAM A. LAMBERT is a Petroleum Engineer for the Bureau of Land Management (BLM), Washington, D.C. office, remotely located in Billings, Montana. He is responsible for providing oil and gas program policy, guidance, and oversight related to operations, reservoir management, and inspection and enforcement. He has been in this position since August of 2012. Will has worked as a Petroleum Engineer for the BLM for 29 years in Worland, Wyoming, Grand Junction, Colorado, and Billings, Montana. He received his Bachelor of Science degree in Petroleum Engineering from the University of Wyoming in 1985. Will is a Registered Professional Engineer in Colorado and is a member of the Society of Petroleum Engineers (SPE).

Unit Participating Areas Montana/Dakotas

• Federal Units are NOT exempt from state spacing

— Well locations must conform to the state setback requirements unless the state grants an exception

[Page 6E-2]

• Generally:

— PA includes all land reasonably proven capable of producing unitized substances in paying quantities

— PA based upon total reserves of the well

• However, if agreed to by all parties:

— Establish PAs based on other parameters such as approved state spacing units

[Page 6E-3]

Vertical Wells

• PA includes all 40-acre legal subdivisions cut 50 percent or more by the outer boundary of the well's calculated drainage configuration


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