Compartmentation, fluid pressure important in Anadarko exploration

Journal Article · Mon Jul 08 04:00:00 EDT 1991 · Oil and Gas Journal; (United States)

OSTI ID:6127250

Al-Shaieb, Z ^[1]

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1. Oklahoma State Univ., Stillwater, OK (US)

Basin compartmentation is an important concept in the exploration and production of hydrocarbons in deep sedimentary basins. Compartmentation can arise in a number of distinct ways through the interplay of sedimentological, mechanical, and chemical factors. These compartments are most easily recognized by their abnormal fluid pressures. These three dimensionally isolated compartments are essentially sealed for an appreciable duration of geologic time. The seal is an encasing zone of very low permeability to all fluids - internal or external to the compartments. Integration of geologic and pressure data in the Anadarko basin strongly suggests the presence of a basin-wide, overpressured, and completely sealed compartment called the mega-compartment complex (MCC). This overpressured domain is controlled by depositional, tectonic, and mechano- chemical diagenetic processes. These processes were responsible for the formation and preservation of completely sealed overpressured reservoirs. The MCC in the Anadarko basin contains rock intervals representing the Pennsylvanian, Mississippian, the Devonian systems. The internal volume of the MCC consists of a network of totally isolated, smaller, nested compartments.

• OSTI ID: 6127250
• Journal Information: Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 89:27; ISSN 0030-1388; ISSN OIGJA
• 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
EXPLORATION
GEOLOGIC STRUCTURES
GEOLOGY
GEOPRESSURED SYSTEMS
HYDROCARBONS
ORGANIC COMPOUNDS
PETROLEUM GEOLOGY
PRODUCTION
RESERVOIR PRESSURE
SEDIMENTARY BASINS