Development Model Of Tazhong Strike-slip Fracture Zone And Its Controlling Effects On Oil And Gas Reservoirs

Tazhong area is developed around Manjiaer depression inside Tarim Basin.Many important oil and gas discoveries have been identified after years of exploration.The strike-slip fault system found in the basin is not only special but also complex.On the basis of previous studies,this paper focuses on two fault zones of the zhonggu 8 and 10,and makes a detailed study and analysis of the strike-slip fracture zone by using Tazhong exquisite seismic data interpretation and combining with the theory and technology of strike-slip fracture research.Through the analysis of the strike-slip fault system in the study area,it is found that the strike-slip fault developed area has complex structural styles both in plane and in section,this paper has carried on exquisite division of them.Through the study of seismic profiles of study area,it is found that the strike-slip faults in the study area have significant multi-period,which can be divided into four main active periods.The corresponding structural layers are subsalt basement structural layer（below TH₂）,Cambrian salt structural layer（TH₂-TH₃）,Ordovician carbonate structural layer(TH₃-TO_3t)and clastic structural layer(TO_3t-TP).The development scale of different faults is not consistent and can be divided into different grades（I,II and III grade）.Based on the detailed dissection of the key fault zones in Tazhong area,the control and influence of the fault system on reservoir transformation and hydrocarbon migration and accumulation are studied.