Petroleum reservoir engineering support for the Office of Naval Petroleum and Oil Shale Reserves. 26R reservoir, recomended MER. Final technical report

Technical Report · Wed Oct 01 04:00:00 EDT 1986

OSTI ID:5164873

The determination of Maximum Efficient Rates (MER) for the subject reservoirs is based on observing the principles of pressure maintenance by up-structure gas injection while taking advantage of the strong gravity drainage potential which exists in the reservoir. In Task Assignment No. 008, under part C.3 regarding Detailed Tasks, we were instructed to determine the MER ''under the current operational restraints.'' This was reiterated in Revision No. 008-A, and it was specified that the policies currently in effect are: (1) Full pressure maintenance at 105% of voidage withdrawal rate. (2) Present oil production rate of 20,000 BOPD is a conservative MER, that is, a lower limit to a MER range. The MER proposal is based on continuing this set of policies approved by both the Department of Energy and the Operating Committee, i.e., full pressure maintenance by gas injection. In order to account for the gas which is apparently being lost due to communication with the overlying formation, the volumetric injection rate is to be maintained at 105% of the total volumetric withdrawal rate. Accordingly, the proposed MER is set at an average of 29,340 BO/D during the six-month period (October 1986 to March 1987) and 29,025 BO/D for the nine-month period ending mid-1987. It is our opinion that these rates should be both attainable and sustainable for the periods in question, but that they should be considered as only interim rates pending a more thorough analysis of the problem. Any reservoir as valuable and complicated as this deserves that its operation be based on more than just a one-month study, and some of the questions raised as a result of this study (covered in a separate addendum) should be addressed before deciding upon the long-range operating program for the reservoir. Furthermore, any long-range program should incorporate flexibility as one of its components. Each year of operation expands the data base, thus permitting evermore rigorous evaluations to be made.

• Research Organization: Evans, Carey and Crozier, Bakersfield, CA (USA)
• DOE Contract Number: AC01-85FE60600
• OSTI ID: 5164873
• Report Number(s): DOE/FE/60600-T4; ON: DE87001324
• Country of Publication: United States
• Language: English

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02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
020700 -- Petroleum-- Economics
Industrial
& Business Aspects
COST
DATA
DRAINAGE
ECONOMIC ANALYSIS
ECONOMICS
ENERGY SOURCES
ENHANCED RECOVERY
EXPERIMENTAL DATA
FLUID INJECTION
FOSSIL FUELS
FUELS
GAS INJECTION
GEOLOGIC DEPOSITS
HYDROGEN COMPOUNDS
INFORMATION
MINERAL RESOURCES
NAVAL PETROLEUM RESERVE
NUMERICAL DATA
OIL WELLS
OPTIMIZATION
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DEPOSITS
PRODUCTION
RECOVERY
RESERVES
RESOURCES
WATER
WELLS