Sequence stratigraphy and sedimentology of a shelf-margin lowstand wedge in the deep Wilcox flexture trend of south Texas

Conference · Fri Mar 01 00:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:7079162

Snedden, J W ^[1]; Cooke, J C ^[2]; Johnson, R K; Conrad, K T ^[3]

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1. Mobil Exploration Norway, Inc., Stavanger (Norway)
2. Mobil Exploration and Producing Services, Inc., Dallas, TX (United States)
3. Mobil Exploration and Producing, US, Houston, TX (United States)

An integrated sedimentologic and biostratigraphic study of 15 wells and over 1400 ft (430 m) of core facilitated establishment of a sequence stratigraphic framework for the deep Wilcox Group of south Texas. This analysis also revealed the presence of a dip-restricted, sand-prone sediment wedge that produces hydrocarbons in growth-fault structures. A sequence stratigraphic framework for the Wilcox was constructed via the use of faunal-increase markers, thin intervals present in well cuttings characterized by rises in the relative abundance of planktonic foraminifera. These marine flooding horizons can be utilized to subdivide the Wilcox Group into four depositional sequences termed P(aleogene)-8, P-7, P-4, and P-3, in descending order. Identification of standard sequence-bounding unconformities is hampered by the poor seismic expression of the Wilcox and the structural complexity of the area.

• OSTI ID: 7079162
• Report Number(s): CONF-910403-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

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02 PETROLEUM
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FORAMINIFERA
GEOLOGIC FAULTS
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