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首页> 美国政府科技报告 >Geological Strategy for Identifying Areas of Higher Gas Production Potential in the Devonian Shales of the Appalachian Basin. Topical Report, August 1988-September 1990.
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Geological Strategy for Identifying Areas of Higher Gas Production Potential in the Devonian Shales of the Appalachian Basin. Topical Report, August 1988-September 1990.

机译：阿巴拉契亚盆地泥盆系页岩识别高产气潜力区的地质战略。专题报告，1988年8月至1990年9月。

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摘要

Gas in the Devonian shale sequence resides in fine pores, natural fractures, and adsorbed to kerogen in a complex structural and stratigraphic system. Deliverability of gas depends largely on the presence of natural fractures although matrix permeability is locally significant. The geological factors that controlled reservoir development are: (1) accretion of Grenville terrances to form the basement; (2) Iapetean rifting which formed the Rome Trough; and (3) combined effects of hydrocarbon generation, stresses, and basement fault reactivation during the Alleghenian orogeny. Structures in the basement have, through periodic reactivation, locally influenced sedimentation and have formed structures and related fracturing in the Paleozoic section. Sedimentation in the shale basin, dominated by the Catskill delta complex on the east, resulted in reservoir-prone lithologies including proximal siltstones and organic-rich shales in the central and western portions of the basin. Productive trends can be predicted in areas with high natural fracture density including those of abundant thermally mature organic matter near the Alleghenian thrust front and along basement structures which show evidence of reactivation. A geologic model incorporating these geologic factors can aid in identifying areas of higher gas production potential. Exploration success must ultimately be a statistical measurement based on numerous wells in an area.

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