Mineralogical controls on rock fluid properties - The Delaware Mountain sandstones, Waha field, west Texas

Conference · Fri Mar 01 04:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5575464

Hays, P D; Tieh, T T ^[1]

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1. Texas A and M Univ., College Station (United States)

Reservoir rocks of the Guadalupian Delaware Mountain Group in Waha field, Reeves Co., Texas are very fine-grained, subarkosic sandstones interbedded with organic-rich siltstones and thin limestones. Shales and detrital clays are notably rare. The Delaware Mountain Group, including in descending order the Bell Canyon, Cherry Canyon, and Brushy Canyon formations, are currently buried at depths of 4,500-8,000 ft in this area. Production is primarily from the Bell Canyon and Cherry Canyon formations. Diagenesis of the Delaware Mountain Sandstones is unique in several aspects: The lack of shale in the sequence precludes significant changes associated with shale diagenesis. Abundant organic matter within the formations may have played an important role in diagenetic processes. Pore fluids migrating from the overlying Castile evaporite sequence are a likely source of early halite cement in the Delaware Mountain Group. Large scale dissolution subsequently removed cement and detrital material, creating abundant secondary porosity. In the study area, reservoir porosities generally range from 20 to 25%. However, permeabilities are low (usually less than 50 md) and water saturations are high due to the presence of pervasive porelining chlorite. Reservoir quality of these sandstones has been controlled to a large extent by diagenetic processes.

• OSTI ID: 5575464
• Report Number(s): CONF-910403--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 75:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000 -- Geosciences
ANHYDRITE
BUILDING MATERIALS
CALCITE
CARBONATE MINERALS
CEMENTS
CHLORITE MINERALS
DEVELOPED COUNTRIES
DIAGENESIS
DISSOLUTION
DOLOMITE
FEDERAL REGION VI
FELDSPARS
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC HISTORY
GEOLOGY
HALIDE MINERALS
HALITE
LITHOLOGY
MATERIALS
MINERAL RESOURCES
MINERALOGY
MINERALS
NATURAL GAS DEPOSITS
NORTH AMERICA
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RESERVOIR ROCK
RESOURCES
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SATURATION
SEDIMENTARY ROCKS
SILICATE MINERALS
STRATIGRAPHY
SULFATE MINERALS
TEXAS
USA
WATER SATURATION