Dolomitization in Smackover Formation, Escambia County, Alabama

Conference · Mon Sep 01 00:00:00 EDT 1986 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6931820

Saller, A H; Moore, B R

Dolomitization is critical to the development of reservoir porosity in the Smackover Formation of southeastern Alabama, as seen in the Appleton and Big Escambia Creek fields. Dolomitization is concentrated in permeable facies on depositional highs. In both fields, the dolomitizing fluids were geochemically similar to the waters in which deposition occurred. Deposition and dolomitization near Appleton field (near the updip limit of the Smackover Formation) occurred in more saline waters than basinward in the Big Escambia Creek field. The Smackover Formation in the Appleton field was deposited in supratidal, intertidal, and shallow lagoonal environments. Abundant bluegreen algal structures and the absence of normal marine fossils indicate the lagoonal waters were hypersaline. In the western part of Big Escambia Creek field, dolomitization is concentrated in the upper Smackover Formation in ooid-peloid grainstones that accumulated on a syndepositional high. Bioturbated peloid packstones and wackestones accumulated in deeper water off the syndepositional high and are not pervasively dolomitized. Rhodolites and calcareous fossil fragments indicate deposition in or near seawater with normal marine salinities.

• Research Organization: Cities Service Oil and Gas Corp., Tulsa, OK
• OSTI ID: 6931820
• Report Number(s): CONF-8610199-
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 70:9; Conference: 36. annual meeting of the Gulf Coast Association Geological Societies and the Gulf Coast Section of SEPM, Baton Rouge, LA, USA, 22 Oct 1986
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
ALABAMA
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
RESERVOIR ROCK
DEPOSITION
DIAGENESIS
DOLOMITE
FOSSILS
GEOLOGIC FORMATIONS
POROSITY
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
FEDERAL REGION IV
GEOLOGIC DEPOSITS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
RESOURCES
USA
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration