Geological Characteristics Of He-1 Member Of The Lower Shihezi Formation Gas Reservoir In Jin 86 Wellblock,Hangjinqi Region,Ordos Basin

Hangjinqi region is located in the northern ordos basin,the regional structure belongs to the northern edge of the yishan slope,across three first-order tectonic units,oil and gas geological condition is relatively complex,different zones and gas accumulation process and main control factors of the accumulation,existing knowledge is difficult to meet the needs of the development.For this reason,the above Paleozoic mainly contains the gas bed system He-1 section as the research object,carries out the gas reservoir geology characteristic research.The paper attempt to sequence stratigraphy,sedimentary petrology,the mine geophysical theory as a guide,the integrated use of core,logging,seismic and testing data,through the analysis of single well facies and sedimentary facies profile and plane distribution characteristics of research,thinks that the study area He-1 are mainly in braided river,the river channel subfacies can be further subdivided into diara and channel microfacies filling;Second,petrological characteristics and pore structure of reservoir characteristics,reservoir physical characteristics are analyzed,and the influential factors of the reservoir characteristics are studied,think the way of sedimentary,diagenesis,detrital grain size and composition is an important factor affecting reservoir physical properties.On the basis of the above research,the characteristics of Jin 86 wellblock He-1 gas accumulation,thinks that the study area belongs to the proximal reservoiring pattern,give priority to with lithologic gas reservoir,reservoiring pattern characterized by "source closely adjacent reservoir,fracture advantage migration,physical control gas reservoir",for the gas field development plan provides a reliable geological basis.