西湖凹陷平北地区平湖组储层特征及主控因素研究  

Diagenesis characteristics and its influence on reservoir property in Pinghu formation of Pingbei area,Xihu sag

作　　者：杨慧[1] 刘广景 蒋俊[1] 汤曼[3] 王承红[1] 陈全[1] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]中联煤层气有限责任公司晋城分公司,山西晋城048000 [3]四川省地质矿产勘查开发局106地质队,四川温江611130

出　　处：《石油化工应用》2015年第11期77-82,共6页Petrochemical Industry Application

摘　　要：平湖组储层是研究区主要油气储层之一,为研究平北地区平湖组储层特征及主控因素,通过该地区13口井的125块岩心资料、240片薄片资料及56个扫描电镜等资料分析认为:研究区储集砂岩岩性以岩屑长石砂岩和长石岩屑砂岩为主,储集空间通常为原生粒间孔、粒间溶孔、粒间溶蚀扩大孔、铸模孔等。平北地区平湖组储集砂岩孔隙度最高可达25.6%,渗透率最高可达1 326.22×10-3μm2,普遍具有中孔低渗的特征。储层的这些特征主要受成岩作用影响,根据对储层的影响可将成岩作用进一步划分为建设性成岩作用、破坏性成岩作用和保持性成岩作用,建设性成岩作用主要为溶蚀作用,破坏性成岩作用通常包括压实及压溶作用、胶结作用,保持性成岩作用常为交代作用。Pinghu formation is one of the main oil-gas reservoirs in the study area, for study of the influence that diagenesis on reservoir physical properties in Pinghu formation of Ping- bei area,the author using 13 wells with 125 pieces of core datas,240 slice datas and 56 scanning electron microscopy and so on.It is analysis that the lithic arkose and the feldspath-ic lithic sandstone is the mianly reservoir sandstone lithology in study area,usually reservoir spaces are primary intergranular pore, intergranular dissolved pore, intergranular corrosion expansion of pore and mold pore, reservoir sandstone porosity up to 25.6 %,and the perme- ability up to 1 326.22×10-3μm2 in Pinghu formation of Pingbei area,reservoir property gener- ally have the characteristics of secondary porosity and low permeability.The characteristics of reservoir in largely controlled by diagenesis.We further divided diagenesis according to the influence of the reservoir property, constructive diagenesis, destructive diagenesis and keep diagenesis.Constructive diagenesis mainly for dissolution, destructive diagenesis usually in- clude cementation,compaction and pressure solution, keep diagenesis is often metasomatism.

关 键 词：西湖凹陷 平北地区 平湖组 成岩作用 储层物性 

分 类 号：P618.13[天文地球—矿床学]