Quantitative Prediction of Natural Fractures in Shale Oil Reservoirs

Figure 3

Fracture types and characteristics in shale oil reservoirs of Qing-1 Member. (a) Extension fracture with high dip angle, and partially filled with calcite. Well G53, 1945.62 m. (b) Shear fracture with moderate dip angle, red arrows indicate striations and sliding directions. Well G47, 1986.27 m. (c) Closely spaced bedding-parallel fractures. WG81, 1845.10-1847.00 m. (d) Overpressure fracture (where the orange arrow indicates). Well G13, 1994.56 m.

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