Analysis of Stratigraphic and Production Relationships of Devonian Shale Gas Reservoirs in Ohio. Annual Report October 1, 1986-September 30, 1987

摘要

The stratigraphy, structure, and production characteristics of the Devonian-Mississippian shale sequence in Meigs County, Ohio, have been evaluated. The Meigs County database consists of permit and completion data for 706 wells, geophysical-log tops of 586 wells, and production records for 410 wells. The lower Huron Shale Member of the Ohio Shale is the primary Devonian unit for natural gas production in Meigs County, as it is in much of the Appalachian Basin. The Devonian shale sequence shows an eastward thickening as well as interfingering of organic shales to the west with clastic sediments to the east. Naturally completed wells have the highest cumulative production but account for less than five percent of the wells. Hydraulically fractured wells have the highest average initial potential but the lowest cumulative production.