A higher resolution stratigraphic and sedimentological study of the subsurface Queen City Formation (Eocene), Nacogdoches and Angelina Counties, Texas

Conference · Sat Sep 01 04:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:6130386

Garner, R D; Roberts, H H ^[1]

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1. Louisiana State Univ., Baton Rouge (USA)

The Eocene Queen City Formation is a regressive fluvial-deltaic and shallow-marine depositional unit in the East Texas basin. Subsurface core and electric well log data are being used in a detailed subsurface stratigraphic study of the Queen City Formation in a portion of East Texas. Log data from approximately 250 wells across a seven county area of east Texas were used to produce stratigraphic cross sections plus structure, formation, and net sands isopach maps showing the regional structure and distribution of Queen City facies. Structure contour maps on the Formation top and base indicate progradation onto a gently sloping, structurally uniform shelf. Formation and net sand isopach maps reveal two lobate centers, of deposition extending basinward along southeast-trending depositional axes in Houston, Trinity, and Angelina Counties. These maps also indicate interval thicknesses greater than 200 feet in southwest Houston and Trinity Counties but thinning dramatically to the east and downdip to the southeast. Net sand thicknesses vary from greater than 100 ft proximal to the Formation thicks to less than 10 ft in the more distal areas. Cores from producing fields in Angelina and Nacogdoches Counties are being used in a study of the sedimentology and depositional history of subsurface Queen City Facies. Previous studies were primarily based on well log data sets alone. Core studies indicate the Queen City Formation in this area is a dominantly fine-grained interval comprised of mudstones, siltstones, and very fine sandstones. Very thin (< 2 ft) sandstones and siltstones are generally located in the uppermost Queen City interval and are attractive shallow production targets.

• OSTI ID: 6130386
• Report Number(s): CONF-9010204--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (USA) Journal Volume: 74:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
&amp; Exploration
58 GEOSCIENCES
580000 -- Geosciences
ALLUVIAL DEPOSITS
CENOZOIC ERA
DRILL CORES
FEDERAL REGION VI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC STRUCTURES
GEOLOGY
MINERAL RESOURCES
NORTH AMERICA
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
SEDIMENTARY BASINS
STRATIGRAPHY
TERTIARY PERIOD
TEXAS
USA
WELL LOGGING