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Gaoyou Sag ancient Pliocene undergone several tectonic movement, forming a complex fault system. Han left FAULTS by tectonic evolution in Gaoyou Sag, border control and influence of faults, faults within the study area has a strike changeable, multi-stage events, staging activities are characterized by the formation of a variety of different combinations of fracture. Complex fracture characteristics of the oil and gas fields late geological research, production practices bring some difficulties. Thus, according to three-dimensional seismic data interpretation, re-understanding of the system and research stay FAULT AND Han, oil and gas exploration in the study area is important. This thesis is to construct geometry, kinematics, dynamics theories and methods as guidance, in-depth understanding of regional geology, based on the analysis of seismic data from the start, with logging data and previous research results, select a typical depth profile, using structural analysis of the Han left the geometric characteristics of fault, tectonic evolution, activities and dynamics mechanism was discussed. Interpretation of seismic data showed that Chinese have to stay on the fault segments, cross section layered structure features. According faults cutting layers of different faults can be divided into four types: penetrating, cutting through the deep strata, cut through the shallow strata, suspension type. Through the analysis of structural geometry, secondary faults that study area north east, east-west oriented, developed on the grid plane, feather breakage portfolio section on the development ladder, Y-shaped fracture combinations, Han left main fault geometry jagged boundary faults with inheritance patterns, tending to straight line of developmental characteristics. Balanced cross section through the tectonic evolution of the Han left faulting rate gap means of three techniques of ancient fault, the fault of the Han to stay, mainly study the characteristics of the secondary fault activity that has a weak alternating fault development, activity centers migrated from west to east characteristics. Combined with previous research, comprehensive geometry, activity characteristics of research results, major tectonic fault causes the following understanding: Han stay faults are caused by reverse gravity imbalance compensation for faults, which tracks the region X Cut surface rupture, forming zigzag shape. Spread fault fracture morphology controlled by Zhenwu, and the first strike in the western fault ① true turning point began to develop; since the Eocene, regional pulling tension deflected northward direction, resulting in dextral strike-slip fault with nature, to the east-west oriented development The secondary faults; based fault development periods and supporting relationships will tomographic study area is divided into three developmental sequence.
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