Genetic Mechanism of Lower-Order Faults in Shale Formations in Rift Basins

Figure 3

Fracture development characteristics of the Subei Basin. (a) Shear fractures developed in mudstone of Well S10, filled with mud, 2300.61 m. (b) Shear fracture developed in mudstone of Well J2, filled with calcite, 2231.52 m. (c) Shear fracture developed in mudstone of Well S10, unfilled, 2288.01 m. (d) Tensile fracture developed in mudstone of Well S10, 2308.21 m. Due to the requirement of confidentiality of oilfield data, we did not display the actual well name.

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