Lithostratigraphy and hydrocarbon potential of the Cambrian (pre-Knox) interval in the Conoco No. 1 Turner well, Rough Creek Graben, western Kentucky
- Kentucky Geological Survey, Lexington, KY (United States)
In 1992 an important deep exploratory well was drilled in the Rough Creek Graben of western Kentucky. The Conoco No. 1 Turner well, in McLean County, reached a total depth of 14,202 feet in Precambrian granite. The objective of this well was to test potential gas reservoirs in Cambrian-age pre-Knox Group carbonates and synrift sandstones. The well encountered no commercial hydrocarbons, but provided new data on the evolution and hydrocarbon potential of the Rough Creek Graben. Encouraged by the Turner well, Conoco has drilled two additional wells in the graben. The Turner well penetrated over 4,000 feet of pre-Knox sedimentary rocks. The clastic rocks lack porosity in the Turner well (because of calcite and quartz cements), but may have reservoir potential in other parts of the basin. The oolitic dolostones contain dolomite cement, and also have no effective porosity. However, bitumen staining is present in the dolostones, indicating that oil moved through the interval. The Conoco Turner well has proven that substaintial thickness of synrift clastics and post-rift dolostones occur in the Rough Creek Graben, and that facies distribution is strongly tectonically controlled. Bitumen staining indicates that hydrocarbons were migrating in the basin, but prediction of effective porosity remains a problem in the search for Cambrian reservoirs in the Rough Creek Graben.
- OSTI ID:
- 159976
- Report Number(s):
- CONF-9510208-; ISSN 0149-1423; TRN: 95:006835-0075
- Journal Information:
- AAPG Bulletin, Vol. 79, Issue 9; Conference: American Association of Petroleum Geologists (AAPG) Eastern Section meeting, Schnectady, NY (United States), 15-17 Oct 1995; Other Information: PBD: Sep 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
The Rough Creek graben of western Kentucky: Some structures and hydrocarbon occurrences near the eastern terminus
Exploration strategies and possible submarine fan complexes in the Rough Creek Graben, western Kentucky