Fault Condensed Zone And Its Control Effect On Oil-gas Reservoir In E_s1 And E_s2 Of Wen'an Area

The structure and evolution of the wenan area in jizhong sag are more complicated,the fracture development is more,and the fracture density distribution.The fracture in the research area is closely related to the cause,and the dense bands of multiple faults are known as fault-dense bands.Predecessors to hebei central depression of an area of fracture development,evolution and control role of research has been very good,but the study of breaking an area populated with less also.In this paper to study the fracture dense with an area of hebei central depression of the control action of hydrocarbon accumulation,firstly investigating the general situation of the regional geology of an area,including an area regional formation development characteristics,regional structure and evolution of features and characteristics of reservoir and caprock.Then on the basis of predecessors' research,an area of going further study sag characteristics of fracture development and activities from fracture type,to combinations,density,size and pattern of the fracture geometry features,fracture system,in turn,to an area to division,according to the characteristics of fracture and tectonic evolution in an area of the six sets of fracture system.And set the conducting fracture of study area,an area outside the conducting fracture development in the main source of slope belt,an area for research fracture density increase effect lays the foundation for oil and gas migration.The following an detailed studied the fracture density distribution and the cause of the fracture density,and study of reservoirs in the study area distribution of an area main structural reservoir,stratigraphic reservoir and fault lithologic reservoir,oil and gas in the plane in hebei central depression in an oil and gas show "block zoning features of distribution,controlled by the fault effect is obvious.Longitudinal,an area of oil and gas by slope depression area of shallow adjustment to ramp up gradually,the buried depth of oil and gas from east to west to reduce gradually,oil and gas accumulation horizon also presents such characteristics.Finally,the control effect of the fracture zone in wenan area on hydrocarbon accumulation was studied.Study area near the source on one side of the fracture density and internal should be favorable for oil and gas gathering where,fracture density boundary faults and the cover layer configuration relationship controls the oil and gas gathering place.Fracture dense joint,sealed edge fracture formation of intensive vertical fracture zone migration of oil and gas in transverse have played an important role in shade,oil and gas in the dense fracture belt edge gathered;If oil and gas are concentrated within the fractured zone,the greater the rupture density,the betterthe oil and gas accumulation.Fracture density along its to the migration of oil and gas in lateral have played an important role in adjusting and dense fracture zone boundary faults can be used as good conducting channel,to match the cover layer of oil and gas accumulation are controlled,when the thickness of cap rock breakout is less than the minimum required a breakout for caprock sealing oil and gas,the thickness of dense fracture zone boundary faults can be raised to the oil and gas migration.