Natural fractures at depth in shale reservoirs: new insights from the southern Sichuan Basin marine shales
Tao Nian,
Yuhan Tan,
Fengsheng Zhang
et al.
Abstract:Natural fractures are pervasive in southern Sichuan Basin marine shales, China, and provide a desired opportunity to understand subsurface fracture network in shale reservoirs. Based on cores and electrical imaging logs from vertical and horizontal petroleum wells in southern Sichuan Basin, four types of natural fractures are identified in terms of orientation, size, filling properties, and spatial distribution. The uncemented bed-parallel shear fracture is developed at or in the vicinity of the mechanical int… Show more
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