Abstract:The scientific analysis of regional stress field leads to clear understanding of the generation mechanism, faulting systems, and torsional directions of the tension-torsional boundary faults at the south part of North China basin. Having analysed the correlation between each boundary segment and regional torsion plus stress in terms of the fact that tension-torsional boundary fault is characterized by arc form, I have found that this kind of fault belt consists of three major stress areas: reverse-torsional strong-tensional area, torsional tension-reduced area and parallel strong torsional area. Using the correlation analysis result, I have put forward the following structure pattern at the upthrow side of a tension-torsional boundary fault: tensional negative structures usually occur in the reverse-torsional strong-tensional area, torsional negative structures ususlly in the parallel strong torsional area, and positive structures in torsional tension-reduced area. This structural distribution pattern allows prediction and discovery of various geological structures at the upthrow side of a tension- torsional boundary fault, thus raising the success rate of hydrocarbon exploration.
贾志斌. 张扭性边界大断层上盘的构造分布模式[J]. 石油地球物理勘探, 1993, 28(5): 584-590.
Jia Zhibin. Structure distribution pattern at the upthrow side of a tension-torsional boundary fault. OGP, 1993, 28(5): 584-590.