Reservoir characterization of multiple-bar sandstones in the Mississippian Cypress Formation, Tamaroa Field, Perry County, Illinois

Conference · Thu Aug 01 00:00:00 EDT 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5741864

Grube, J P ^[1]

---

1. Illinois State Geological Survey, Champaign (United States)

Tamaroa field produces principally from lenticular sandstones in the upper part of the Chesterian Cypress Formation. These sandstone bodies, interpreted to be marine bars, are typically less than 10 ft thick, 0.25 to 0.5 mi wide,and less than 2 mi long. The bars are vertically stacked and trend northeast-southwest in an en echelon pattern. Spontaneous potential and gamma ray log character, as well as core data, show that shales ranging in thickness from 10 ft to less than 1 ft separate the sandstones. Hydrocarbons are produced from the clean parts of the bars that drape across three structural folds. Multiple structural closures and the stacking of shale-separated bars create discrete reservoir compartments in Tamaroa field. Understanding reservoir compartmentalization is a key factor in designing and infill drilling or waterflood program in a multiple-bar complex such as the one at Tamaroa field. Optimum recovery efficiency therefore can be achieved by using a detailed reservoir model.

• OSTI ID: 5741864
• Report Number(s): CONF-9109238-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:8; Conference: American Association of Petroleum Geologists (AAPG) eastern section meeting, Pittsburgh, PA (United States), 8-10 Sep 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ILLINOIS
PETROLEUM DEPOSITS
RESERVOIR ROCK
STRATIGRAPHY
CARBONIFEROUS PERIOD
ENHANCED RECOVERY
GEOLOGIC FORMATIONS
GEOLOGIC MODELS
PETROLEUM GEOLOGY
SANDSTONES
DEVELOPED COUNTRIES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
MINERAL RESOURCES
NORTH AMERICA
PALEOZOIC ERA
RECOVERY
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
020200* - Petroleum- Reserves
Geology
& Exploration