West Chalkey, Cameron Parish, Louisiana - A case for continued exploration in mature producing provinces

Conference · Sat Sep 01 00:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:5917214

Klefstad, G E ^[1]

---

1. Transco Exploration Co., Houston, TX (USA)

A potential giant gas field has been discovered in the very mature exploration province of south Louisiana by Transco Exploration Partners (TXP) and Exxon Company USA. The West Chalkley prospect is located in Cameron Parish, Louisiana, and is productive in the upper Oligocene Miogypsinoides (Miogyp) sandstones. The discovery is in the same producing trend as the prolific South Lake Arthur field, where the Miogyp sandstones have gas reserves on the order of 1.0 tcf The prospect was generated by a combination of trend analysis, subsurface well control, and reflection seismic data. The feature appears to be a faulted anticline separate from the nearest production in the area, Chalkley field, which is located about 1 mi cast and discovered in 1938. Both TXP and Exxon, working independently, recognized the potential prospect and pursued leasing activities in the area. TXP initiated discussions with the landowner in February 1988 and acquired a 960 ac lease in June. Exxon leased approximately 2,100 ac surrounding the TXP lease about one month later. TXP subsequently sold the prospect to Exxon on October 12, 1988. The Exxon 1 Sweet Lake Land and Oil Company was spudded on March 16, 1989, and reached total depth of 15,600 ft on July 4, 1989. Log analysis indicated nearly 500 net ft of gas pay in the 805-ft gross productive interval. Testing through perforations near the base of the pay zone yielded flow rates as high as 21.28 MMCFGPD and 338 BOPD. The discovery well is expected to be on production by early 1990 at rates approaching 50 MMCFGPD. Two delineation wells are currently drilling and a deeper pool wildcat is planned to spud around mid-1990 to determine the areal extent and ultimate size of this important new find.

• OSTI ID: 5917214
• Report Number(s): CONF-9010204-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 74:9; Conference: Gulf Coast Association of Geological Societies and Gulf Coast Section of SEPM (Society of Economics, Paleontologists, and Mineralogist) meeting, Lafayette, LA (USA), 17-19 Oct 1990; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
58 GEOSCIENCES
LOUISIANA
NATURAL GAS DEPOSITS
EXPLORATION
ANTICLINES
MATURATION
PRODUCTION
RESERVES
SANDSTONES
SEISMIC SURVEYS
TERTIARY PERIOD
WELL DRILLING
CENOZOIC ERA
DRILLING
FEDERAL REGION VI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SURVEYS
USA
030200* - Natural Gas- Reserves
Geology
& Exploration
580000 - Geosciences