Structural And Evolutionary Characteristics Of The LuXi Sag

The Sunken,the first level tectonic unit in the large basin is further divided into the sub-first- level negative structure unit in the uplift and depression. Structure is the combination of the various components of the earth’s crust or lithosphere and the combination of the methods and features of the general term. The evolution of tectonic system refers to the process of the formation and development of the structural system from the perspective of time.Based on the fine structural interpretation of 3D seismic data, the sequence framework of the LuXi Sag,Through the research on the structural characteristics and evolution characteristics of this Sag, get the conclusion: The First level fault(XiSaoGen fault) of the development of the LuXi Sag, which controls the formation and evolution of the whole sag. the formation and evolution of this sag;Two second level faults, including the BaoRiWenDu fault and the fault in the south of the Bao24 wells, control the distribution of the faults in the sag. The evolution process of the west depression is divided into 4 stages by using the balanced section technique: initial fault depression, tension crack, stable subsidence and return atrophy.After 4 stages of evolution, the tectonic framework of the LuXi sag has been formed.By analyzing the law of drilling well and reservoir formation in the LuXi sag, it can be seen that the structure and evolution of the depression play a controlling role in the formation of the reservoir.