Future trends in sandstone diagenesis

Conference · Tue Mar 01 04:00:00 EST 1983 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6183363

Franks, S G

Discovery of highly porous and permeable sandstones at great depths and temperatures has clearly demonstrated that porosity reduction with depth is not monotonic. Recognition that porosity can be created in sandstones at depth has spurred tremendous interest in developing predictive models of porosity evolution and distribution in sedimentary basins. Historically, diagenesis has been considered a function of sandstone composition and temperature. However, it has become increasingly clear that this view is too simplistic. Factors such as pore fluid composition, flow rate, organic maturation, and time may significantly alter the course of diagenesis. Development of predictive models that provide for these parameters will, when coupled with structural-stratigraphic and hydrocarbon generation models, permit the relative timing of porosity evolution, hydrocarbon generation, and trap formation to be determined. In order to simulate the diagenetic evolution of basins and predict porosity distribution, the processes that lead to creation and destruction of porosity must be understood. Many of the important porosity-producing processes have been identified through petrologic studies: dissolution of carbonates, feldspars, and rock fragments. Formation of deep porosity in a variety of basins is commonly associated with precipitation of kaolinite and iron-rich carbonate, suggesting that, although the paths of diagenesis may be diverse, common trends exist. Development of predictive diagenetic models will require continued accumulation of petrologic data and case studies more fully using presently available technology. This will better document the time, temperature, and chemical environment of formation of diagenetic materials.

• Research Organization: ARCO Oil and Gas Co., Dallas, TX
• OSTI ID: 6183363
• Report Number(s): CONF-8304200-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 67:3
• 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
DIAGENESIS
EXPLORATION
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
MATURATION
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
POROSITY
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
TEMPERATURE EFFECTS