Research On The Main Controlling Factor Of Hydrocarbon Accumulation In Xicaogu Structual Belt In Shulu Sag Of Hebei Central Depression

Main control factors refers to control the key factor for the formation of oil and gas reservoirs.In many factors of reservoir formation,some factors are ubiquitous,these factors are not key factors,but one or several factors is not widespread,if lack them,reservoir can't form,these key factors are the main controlling factors of hydrocarbon accumulation.Xicaogu structual belt in Shulu sag is a low degree of prospecting area,this area as the research object the purpose is to find out the main oil-bearing horizon of shahejie formation,the main controlling factors of hydrocarbon accumulation in the expanding scale of reservoir exploration and development.The basic conditions of hydrocarbon accumulation of hydrocarbon source rock,reservoir,cap rock,trap,migration and preservation,etc.,only these basic conditions when there is a good configuration relationship in time and space to form reservoirs.This paper make full use of seismic,logging,logging and geochemical data,by means of oil source,conducting layer,fault and comprehensive analysis of the configuration of the relationship between each other,and summarizes the main controlling factors of hydrocarbon accumulation.The research results show that the west Cao Gu structure with good accumulation conditions,source rock has a total of two sets of hydrocarbon source rock development,two strata depth corresponding to Es1,Es3,organic matter type is given priority to with ? type,part is ? model,including sand three hydrocarbon source rocks with high abundance of organic matter,most of the region enters the thermal evolution of low mature stage;Connecting sand body distribution area is wide;Have connected oil source and existence of conducting fracture reservoir.As main control factors mainly include three aspects,the first on the one hand,distribution control of mature hydrocarbon source rock in the reservoir plane distribution scope;The second aspect,could be divided into two categories: conducting system forward reverse toothbrush toothbrush type,type,reverse toothbrush type configuration relationship is more advantageous to hydrocarbon accumulation;The third aspect,fault with the cover together control reservoir gather.