鄂尔多斯盆地姬塬地区长8_2油层储层特征及控制因素分析  

The Characteristics and Controled Factors of Chang 8_2 Reservoir in Jiyuan Area,Ordos Basin

作　　者：刘宗堡[1] 陈岩[1] 刘广林[2] 

机构地区：[1]东北石油大学地球科学学院,大庆163318 [2]长庆油田公司勘探开发研究院,西安710021

出　　处：《科学技术与工程》2014年第5期211-214,222,共5页Science Technology and Engineering

基　　金：国家自然科学基金项目(41072163)资助

摘　　要：鄂尔多斯盆地姬塬地区长82油层为低孔低渗储层,利用岩心、测井和砂岩薄片等资料对储层岩石学类型、孔隙类型和物性特征分析表明:长82油层储层类型为长石岩屑砂岩、岩屑长石砂岩;砂岩粒度以细砂岩、细-中砂岩为主;孔隙类型以粒间孔为主,其次为溶孔,属于小孔微喉型储层。进一步研究表明储层特征及优质储层发育受沉积和成岩双重作用控制:沉积作用形成的中砂岩与细砂岩孔隙度相差不大;而渗透率相差悬殊,厚层砂岩的物性好于薄层砂岩的物性;成岩作用造成河道主体微相中部发育绿泥石膜,保存了大量的粒间孔物性好,薄层非河道主体微相压实与胶结作用强烈,储层物性差。Ordos basin Jiyuan area Chang 82reservoirs with low porosity,low permeability reservoir.using the data of core,logging and sandstone thin slice,type reservoir petrology,pore types and physical property characteristics analysised shows that the Chang 82reservoir types for feldspar lithic sandstone and lithic feldspar sandstone;Grained sandstone mainly in fine sandstone and fine sandstone;Pore types mainly intergranular pore,followed by solution pores,reservoir belongs to the micro pore throat type.Further research shows that reservoir characteristics and the development of high quality reservoirs are controlled by sedimentary and diagenetic dual role：sedimentation in the form of fine sandstone and sandstone porosity were similar,while the permeability difference,the thick sandstone physical property is better than that of thin layer sandstone physical property;Diagenesis causes river in central microfacies development chlorite membrane,save a lot of intergranular pore property is good,a thin layer of channel main body strong compaction and cementation microfacies,reservoir physical property is poor.

关 键 词：鄂尔多斯盆地 姬塬地区 长82油层 物性特征 控制因素 

分 类 号：TE122.2[石油与天然气工程—油气勘探]