Geology and Engineering Characteristics of Selected Low-Permeability Gas Sands: A Survey

摘要

Blanket-geometry sands have been deposited by different depositional systems than lenticular sands, with resulting differences in external and internal reservoir geometry and in the techniques necessary to find, develop, and produce the tight, blanket-geometry gas sand. This survey was conducted with emphasis on clastic depositional systems and the expected transferability of results between stratigraphic units. The expected transferability has been termed 'extrapolation potential'. Information was compiled for stratigraphic units in 16 sedimentary basins regarding the general attributes, economic factors, geologic parameters of the basin, geologic and engineering parameters of the unit itself, and operating conditions applicable to selected blanket-geometry tight gas sands. This survey investigation provided valuable screening of thirty-three stratigraphic units using broad criteria. The survey report recommended that five stratigraphic units be considered by GRI in selecting its priority research areas.