Bibliographic Citation
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Title | Middle Devonian Winnipegosis reefs of Tableland area, southeast Saskatchewan |
Creator/Author | Martindale, B. ; Orr, N. |
Publication Date | 1988 Jul 01 |
OSTI Identifier | OSTI ID: 6180022 |
Report Number(s) | CONF-8808223- |
Other Number(s) | CODEN: AABUD |
Resource Type | Conference |
Specific Type | Journal Article |
Resource Relation | AAPG (Am. Assoc. Pet. Geol.) Bull. ; Vol/Issue: 72:7; AAPG Rocky Mountain Section meeting; 21 Aug 1988; Bismarck, ND, USA |
Research Org | Home Oil Co. Ltd., Calgary, Alberta (Canada) |
Subject | 020200 -- Petroleum-- Reserves, Geology, & Exploration; PETROLEUM DEPOSITS-- RESERVOIR ROCK;PETROLEUM DEPOSITS-- SOURCE ROCKS;SASKATCHEWAN-- PETROLEUM DEPOSITS; DEPOSITION;DOLOMITE;GEOLOGIC FORMATIONS;SEDIMENTARY BASINS;SEISMIC SURVEYS |
Related Subject | ALKALINE EARTH METAL COMPOUNDS;CALCIUM CARBONATES;CALCIUM COMPOUNDS;CANADA;CARBON COMPOUNDS;CARBONATE MINERALS;CARBONATES;GEOLOGIC DEPOSITS;GEOLOGIC STRUCTURES;GEOPHYSICAL SURVEYS;MAGNESIUM CARBONATES;MAGNESIUM COMPOUNDS;MINERAL RESOURCES;MINERALS;NORTH AMERICA;OXYGEN COMPOUNDS;RESOURCES;SURVEYS |
Description/Abstract | In 1986, Home Oil drilled the first of several hydrocarbon-bearing Winnipegosis reefs in the southeastern part of the Elk Point basin in Saskatchewan.^The discovery well, 8A-22-2-9W2, initially flowed 37/degrees/ API oil at 223 m/sup 3//day (1400 bbl/day) from a dolomitized buildup estimated to be 70 m thick.^This well was located using conventional two-dimensional and seismic modeling techniques.^A pseudo 3-D survey, using the existing grid of 2-D data, was used to locate subsequent wells.^The reef consists of a basal fossiliferous mound with steep cemented flanks and directly overlies the lower Winnipegosis platform.^This basal mound is overlain by a series of coalesced peloid and codiacean algal grainstone shoals, also with steep cemented margins.^The shoals are capped by a framestone unit of branched corals and stromatoporoids in a lagoonal position and by a boundstone unit of blue-green and red algae forming a reef crest.^Dolomitic laminites of the Ratner Member (upper Winnipegosis lower Prairie Evaporite) overlie the reef flank and occur between reef complexes in basinal areas.^These laminites, in turn, are overlain by anhydrites and halites of the Prairie Evaporite Formation.^The reef in the Tableland area is characterized by a fauna of high abundance and low diversity, both indicative of growth in a stressed, probably hypersaline, environment.^Reservoir quality of the Winnipegosis depends both on original depositional facies and subsequent diagenetic events.^Although extensively dolomitized, both shallow and deep diagenetic fabrics can be recognized.^Oil source rock correlations prove that the hydrocarbons in the Tableland reef are locally sourced from bituminous mudstones of the Ratner Member. |
Country of Publication | United States |
Language | English |
Format | Pages: 876-877 |
System Entry Date | 2001 May 13 |
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