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An experimental study on the influence of fault plane shape on petroleum migration in shallow and middle deep formations



An experimental study on the influence of fault plane shape on petroleum migration in shallow and middle deep formations



Zhongguo Haiyang Daxue Xuebao 35(2): 244-248, 272



On the basis of geological studies of hydrocarbon migration and accumulation in the middle and shallow formations in Dongying depression, this experiment models the influence of opening faults of different fault-plane shapes on petroleum migration and accumulation with a 2-D model. The results are as follows: (1) The fault-plane shape has a great influence on the moving path and pattern of petroleum in middle and shallow formations in impulsive (unsteady) injection conditions. S-shaped faults are most favorable for the petroleum migration of both upper and lower plate layers, and the oil-moving speed is fast. Concave faults are favorable for the migration of lower sand beds, and convex faults are favorable for the migration of upper sand beds, (2) The more abrupt and less bent the faults are, the easier the migration of oil is; that is to say, convex faults play the role of divergence, while concave faults play the role of convergence, which is well known, but has not been shown by a modelling experiment.

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