North Shaanxi Slope Middle East Minister 6 Control Effect Of Reservoir Sedimentary Relative Physical Property

The slope of northern Shaanxi is the main exploration and development area in Ordos Basin,and the Lithologic reservoir is multi-developed.Sedimentary facies control The enrichment law of lithologic reservoirs,and physical property is the core of reservoir enrichment and oil and gas.Studying the control effect between the two is very helpful in finding the dominant reservoir.At present,the research on the control effect of sedimentary relative physical property in the study area is still relatively limited.On the basis of core observation,this study makes a study and discussion on the sedimentary facies,petrological characteristics,pore seepage characteristics and variation rules of the 6 reservoir of the district chief by means of logging interpretation,conventional sheet and cast sheet observation,physical analysis and other analysis and testing methods.The three well areas with changes in sedimentary facies in the study area were compared horizontally,and the following understanding was obtained:The 6 reservoir of the district governor of ZB well is the sedimentary facies of Delta Plain,which can be divided into shunt channel,shunt channel flank,micro-phase between shunt channel,strong hydrodynamic condition,fine granular feldspar sandstone in development,thin layer mudstone,sandstone thickness is larger.Developed parallel,Groove staggered layer,common upright wormhole.The 6 reservoir of CK Well is the Delta front sedimentary facies,which can be divided into underwater shunt channel,underwater shunt channel flank,shunt interstitial Bay microfacies,medium hydrodynamic conditions,development of thick layered fine sandstone,clamp a small amount of powder sandstone,silt mudstone,development of block layer,staggered layer,tectonic bottom development has scour surface.The 6 reservoir of FH Well is a turbid fan sedimentary facies,which can be divided into turbid water channel,turbid water channel,medium fan transition zone microfacies,hydrodynamic conditions are medium-weak,developing feldspar fine sandstone,clamping feldspar fine sandstone,developing groove mode,Groove mode two special sedimentary structures,is a good identification mark.The main factors affecting the physical property of 6 reservoir in the study of district governors can be concluded that the sedimentary facies control the spatial distribution of sandbodies,and the differences of rock mineral composition,rock size,sand layer thickness and sedimentary structure under different sedimentary environments will affect the physical property of different sedimentary microfacies.The physical property of the sand body of the shunt channel and the underwater shunt channel is better,and the plane distribution of the sedimentary facies controls the plane distribution of the porosity and permeability of the sandstone,with the best physical property of the sandstone in the shunt channel and the underwater shunt channel,followed by the sand body at the edge of the river.