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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 65 (1981)

Issue: 5. (May)

First Page: 931

Last Page: 931

Title: Devillier Field, Chambers County, Texas--Effects of Growth Faults and Deltaic Sedimentation on Hydrocarbon Accumulation in a Stratigraphic Trap: ABSTRACT

Author(s): Patrick T. Gordon

Article Type: Meeting abstract


Devillier field is an overpressured gas reservoir producing from upper Vicksburg (lower Oligocene) Loxostoma "B" delicata-age sands which pinch-out near the crest of an anticline located on the downthrown side of the Vicksburg flexure. The field is located 50 mi (80 km) east of Houston in northeastern Chambers County, Texas. The first year's production per well has averaged 1.0 Bcf gas and 13,000 bbl condensate, for the seven wells completed since the field discovery in 1975. Calculated open flows have ranged as high as 600,000 Mcf gas per day from an average net-sand interval of 25 ft (7.6 m) at depths between 10,550 and 10,750 ft (3,216 and 3,277 m).

A structure map on the upper Frio (upper Oligocene) shows south-southeast regional dip over the field. Structure and isopach maps on the upper Vicksburg show north-northwest dip, and thickening of sands and shales into the Vicksburg flexure northwest of the field. Correlation of stratigraphic units indicate maximum growth across the flexure during upper Vicksburg time. Based on the regional stratigraphic framework, paleontologic data, and microscopic analysis of conventional core and sidewall core data, the upper Vicksburg sediments are considered to have been deposited in a shallow-marine environment. Based on analysis of composition, sorting, and grain size of detrital minerals and quartz from cores and cuttings, the field pay, the Loxostoma sand, is interpreted to have been deposit d in a delta distributary mouth bar. Pinch-out of this sand facies against a prodelta shale facies has resulted in creation of a true stratigraphic trap.

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