Reservoir characterization of Tuscaloosa sand by mineralogical and petrophysical data
A laboratory investigation has been made of the relationship between mineralogical and petrophysical properties of Tuscaloosa sandstone with a combination of petrographic analyses, formation-resistivity-factor measurements, and rock failure analyses. Petrographic analyses revealed that on the basis of the mineralogy of pore-filling and pore-lining cements, Tuscaloosa sandstones can be divided into two distinct types: those with authigenic quartz-overgrowth cement blocking the pore throats and those with authigenic chlorite cement coating the sand grains and preserving the pore system. For each type of sandstone, a well-defined relationship exists between the cementation factor m and other physical properties of the rock, such as porosity, type of cement, compressive strength, cohesive strength, failure angle, angle of internal friction, Young's modulus, Poisson's ratio, and drilling strength. Furthermore, we found that the fracture mechanism is grain fracturing in a fairly brittle mode for silica-cemented sandstone, while the fracture mechanism is grain sliding and pore closure or expansion for chlorite-cemented sandstones.
- Research Organization:
- Core Analysis Inc.
- OSTI ID:
- 6963167
- Journal Information:
- SPE (Society of Petroleum Engineers) Format. Eval.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Format. Eval.; (United States) Vol. 1:6; ISSN SFEVE
- Country of Publication:
- United States
- Language:
- English
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020200* -- Petroleum-- Reserves
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030200 -- Natural Gas-- Reserves
Geology
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BENCH-SCALE EXPERIMENTS
BRITTLENESS
BUILDING MATERIALS
CEMENTING
CEMENTS
CHALCOGENIDES
CHLORITE MINERALS
COATINGS
COMPRESSION STRENGTH
ELECTRIC LOGGING
FEDERAL REGION VI
FRACTURE MECHANICS
FRICTION
GEOLOGIC DEPOSITS
HYDRAULIC CONDUCTIVITY
INCIDENCE ANGLE
LOUISIANA
MATERIALS
MECHANICAL PROPERTIES
MECHANICS
MINERAL RESOURCES
MINERALOGY
MINERALS
NATURAL GAS DEPOSITS
NORTH AMERICA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROGRAPHY
PETROLEUM DEPOSITS
POISSON RATIO
POROSITY
QUARTZ
RESISTIVITY LOGGING
RESOURCES
ROCK MECHANICS
ROCKS
SAND
SANDSTONES
SEDIMENTARY ROCKS
SILICA
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
USA
WELL LOGGING
YOUNG MODULUS