Fine Structural Research In Wubao Fault Zone In Gaoyou Sag

Wubao fault system has an important impact to the hydrocarbon generation,migration,accumulation and distribution in Gaoyou Sag.This article collects and studies geological data,logging data,seismic data,on the basis of the research area of Wubao fault system structure detailed interpretation and fracture characteristic analysis,comprehensive use of multidisciplinary knowledge theory,using the method of structural analysis from the fracture geometry and dynamics of the main research analysis is made on the fracture zone,research in oil and gas migration,into the role of the main fracture thermal fluid activity,and analyze the distribution characteristics of igneous rock in Gaoyou Sag,evaluation has a great significance for the rolling exploration in the region.Through conventional 3D seismic interpretation technology,to research the main horizon and faulted for detailed interpretation;In the seismic interpretation must be combined with the interpretation of the original scheme,main explanation horizon include T33,T40 reflector,reframe Wubao fault system development of the regional tectonic characteristics.According to the result of tectonic interpretation study of Wubao fault system,the structural style and the section plane,Wubao fault system is relatively complex.Comprehensive consideration of the fault activity time,factors such as the size of the fault activity as well as genetic mechanism,Wubao fault system contained faults that can be divided into four classes,which is suitable for primary fracture,Wu(1)fault belongs to the boundary fault in Gaoyou depression;Wu(2)fault as the secondary fracture,fault in Gaoyou Sag and control the form and development of the tectonic belt of large fault.Igneous rocks widely in Gaoyou Sag,Due to volcanic activity is often associated with the development of fault,distribution of lithologic and stratigraphic often controlled by faults,so the deep fault that is mainly the influence of igneous rock distribution,cyclization,zonal distribution along the fracture.Igneous rock intrusion of pore,fracture have created favorable conditions for hydrocarbon migration.According to Wubao fault system tectonic evolution analysis: funing period,Dainan period and the Snduo period are the main development of fault,concomitant with Tanlu fracture system of strike-slip faults.After detailed interpretation in Chenbao oil field found the reverse fault,and analyzes its geometry features and activity research.Chen 9 fault block trap was evaluated according to the structure interpretation,the planar projection area about 1.85 km2.Thrust under the control of the discovery of favorable traps for oil and gas exploration in the study area provides a new direction.