Study Of Glutenite Reservoir Characteristics Of Shang Wuerhe Formation In Jinlong2 Oil-field Of Junggar Basin

Glutenite reservoirs are widely distributed in our country,proven reservoir reserves are abundant,is a hot spot of the current oil and gas exploration and development.The Shang Wuerhe Formation of Permian in Jinlong2 Oil Field is a typical of glutenite reservoir,has the rich oil and gas resources.However,due to the particularity of the sedimentary of glutenite reservoir,has a serious impact of the reservoir pore structure and physical property,reservoir exhibits a strong heterogeneity and difficult to describe.The thesis based on the theory of Sedimentology and Reservoir Geology,by the analysis of the core,logging,seismic and analytical tests,make a systematical study of the glutenite body of Shang Wuerhe Formation in Jinlong2 Oil Field of Junggar Basin and research the forming environment,composition,diagenesis,reservoir space,pore structure and reservoir type of the glutenite body and have a reservoir evaluation and prediction.The study shows that the Shang Wuerhe Formation can be divided into three sections on the longitudinal,of which P₃w₁ and P₃w₂ are the target layers in this research that can be divided into eight small layers.The lithology is composed of low-maturity glutenite,conglomeratic sandstone and litharenite,the lithic are mainly composed of tuff,followed by andesite and felsite.A variety of sedimentary microfacies types are developed in Shang Wuerhe Formation,mainly in the underwater distributary channel and underwater debris flow deposition,which shows a certain characteristics of the cycle in the vertical.The whole formation is a fan delta-lake sedimentary system in the rise half cycle of transgressive system tract,the provenance mainly comes from Carboniferous heave in the northwest.The glutenite has experienced strong compaction,cementation and dissolution,which are obviously modified by later diagenesis and the whole is in the middle of the diagenetic stage A.The types of reservoirs pore are mainly composed of residual intergranular pore and dissolved pore,The P₃w₁ and P₃w₂reservoirs are mainly composed of micro-fine pore throat,showing low porosity-special low porosity,low permeability characteristics,strong heterogeneity,upward physical property better.Establishing standards for glutenite reservoir evaluation in this area,the P₃w₁ and P₃w₂ glutenite reservoir can be divided into four types,in which?₂ and?reservoirs are the main reservoirs in the area,which the porosity is generally greater than 8%and the permeability greater than 1mD,mainly develop in the middle of the study area.