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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 66 (1982)

Issue: 2. (February)

First Page: 248

Last Page: 248

Title: Depositional Facies, Diagenesis, and Reservoir Heterogeneity of Upper San Andres Formation in West Seminole Field, Gaines County, Texas: ABSTRACT

Author(s): M. W. Zaaza

Article Type: Meeting abstract


The upper San Andres Formation at West Seminole field can be divided into three depositional sequences of transgressive, regressive, and transgressive cycles culminating in thick tidal-flat deposits. Diagenesis altered sabkha environments via dolomitization, anhydration, and de-anhydration. Heterogeneous porosity and permeability result in porous and permeable layers separated by nonporous and impermeable layers or porous and impermeable layers. The reservoir characteristics are the combined results of depositional facies and diagenesis.

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Copyright 1997 American Association of Petroleum Geologists