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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 69 (1985)

Issue: 2. (February)

First Page: 236

Last Page: 236

Title: North Pecan Island Field: a Mature Trend Discovery in Miocene of Southern Louisiana: ABSTRACT

Author(s): A. G. Bauer, J. A. McCormick

Article Type: Meeting abstract


The Exxon 1 M. J. Epley discovery well for North Pecan Island field was completed in early 1982 as a discovery of significant new gas and condensate reserves in the mature Miocene trend of south Louisiana.

The field is located in Vermilion Parish within a large megablock between 2 major down-to-the basin growth-fault systems and is on the southern end of a south-plunging structural nose. Traps in 2 fault segments are formed in southeasterly dipping beds upthrown to 2 north-dipping, sealing faults. Six separate Robulus chambersi sandstones contain gas and condensate reserves.

Major gas and condensate reserves from sandstone reservoirs in the R. chambersi section were discovered in the mid-1960s 3.3 mi. west in the Pecan Island field and in the North Freshwater Bayou field, 5 mi northeast of the North Pecan Island field discovery. Several earlier dry holes just north of the discovery were drilled seeking to extend production from the upstructure Fire Island field (3 mi north), which produced a limited amount of gas and condensate from R. chambersi sandstones. Extensive structural and isopach mapping, aided by new high-resolution seismic data, revealed the North Pecan Island prospect to be structurally high to production at Pecan Island and that the prospective section was deposited over a growing paleostructure.

Four wells have been completed to date in the field, with flow rates as high as 30 MMCFGD. Current estimates place the new field recoverable at approximately 250 bcf of gas and 6 million bbl condensate.

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