West Hackberry Tertiary Project. Quarterly technical progress report, March 3, 1995--June 2, 1995 Page: 3 of 18
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The goal of the West Hackberry Tertiary Project is to demonstrate the technical and
economic feasibility of combining air injection with the Double Displacement Process for
tertiary oil recovery. The Double Displacement Process is the gas displacement of a
water invaded oil column for the purpose of recovering oil through gravity drainage. The
novel aspect of this project is the use of air as the injection fluid. The target reservoir for
the project is the Camerina C-1,2,3 Sand located on the West Flank of West Hackberry
Field in Cameron Parish, Louisiana. If successful, this project will demonstrate that the
use of air injection in the Double Displacement Process can economically recover oil in
reservoirs where tertiary oil recovery is presently uneconomic.
Summary of Technical Progress
Air injection was initiated on November 17, 1994. During this quarter, the West
Hackberry Tertiary Project completed the first six months of air injection operations. The
following events are reviewed in this quarter's technical progress report: 1)early nitrogen
breakthrough seen in the Gulf Land D No.56, 2)corrosion downhole in the air injectors
and at the wellsite injection skid, 3)fill in the Watkins No.16 air injection well,
4)temperature logs run in air injectors(after 24 hours of shut-in), 5)substantial air
compressor down time, 6)official startup ceremony and technology transfer activities.
)Early Nitrogen Breakthrough seen in the Gulf Land D No.56
On February 9, 1995, a shut-in bottom hole pressure survey was run in the Gulf Land D
No.56. Despite the fact that no gas had been injected into the Gulf Land D No.56, the
tubing was found to be filled with a gas. Upstructure to the Gulf Land D No.56, a total of
only 31 MMSCF of air had been injected into the Watkins No.16 as of February 9, 1995.
The Gulf Land D No.56 was flowed and three gas analyses were performed on the
produced gas. The three gas analyses produced similar results with an average
composition of 67.9% methane, 26.5% nitrogen, 1.6% carbon dioxide, 0.35% oxygen and
3.65% hydrocarbon gasses heavier than methane. The high nitrogen content in the
produced gas indicated that nitrogen had prematurely broken through to the Gulf Land D
No.56. Based upon the available reservoir and geologic data, the source of the nitrogen
found in the Gulf Land D No.56 is believed to be the air injected into the Watkins No.16.
The Gulf Land D No.56 is about 800' west of the Watkins No.16 and 400' downstructure.
Even though the Watkins No.18 is 100' downstructure to the Watkins No.16 and only
400' north, the Watkins No.18 has seen no evidence of nitrogen production thus far. On
April 6, 1995, a pulsed neutron log was run in the Watkins No.18 that showed no
evidence of gas presence in the vicinity of the wellbore. An attachment which shows the
Watkins No.18 pulsed neutron log overlaid onto the electric log is included in this report.
The lack of nitrogen presence in the Watkins No.18 would seem to prove fault separation
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Gillham, T.; Cerveny, B. & Turek, E. West Hackberry Tertiary Project. Quarterly technical progress report, March 3, 1995--June 2, 1995, report, May 31, 1995; United States. (https://digital.library.unt.edu/ark:/67531/metadc784816/m1/3/: accessed April 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.