涪陵地区长兴组成岩作用及其对储层的影响  

The Diagenesis of the Changxing Formation and Its Influence on Reservoirs of Fuling Area

作　　者：王勇[1] 田雪松[2] 汪建辉[3] 

机构地区：[1]成都理工大学核技术与自动化工程学院地球化学系,成都610059 [2]成都理工大学能源学院,成都610059 [3]中国石油化工股份有限公司南方勘探开发分公司,成都610041

出　　处：《科技通报》2013年第7期19-23,共5页Bulletin of Science and Technology

基　　金：国家自然科学重点基金项目(40739903)

摘　　要：通过普通薄片鉴定、铸体薄片分析、岩芯观察、孔隙度及渗透率测试等,对涪陵地区长兴组储层成岩作用进行了详细的分析。长兴组储层储集空间以次生的晶间溶孔及晶间孔为主,储层经历了复杂的成岩作用改造,成岩作用类型多样,包括压实压溶作用、胶结作用及硅化作用等破坏性成岩作用和白云石化作用、溶蚀作用、破裂作用及重结晶作用等建设性成岩作用。长兴组储层均发育于与埋藏白云石化有关的白云岩或灰质白云岩中,埋藏白云岩化是长兴组储层发育的关键因素。Based on the observation and study of a large number of cores and sections,porosity testing,permeability testing and so on,this paper deeply discusses diagenesis of the Permian Changxing formation in Fuling area.The reservoir spaces of Changxing formation are mainly Intercrystal pores and intercrystal dissolved pores.Reservoirs of Changxing formation had suffered complicated diagenesis;they can be classified into two sorts： destructive diagenesis and constructived one.The destructive diagenesis such as Depression,pressure solution,cementation and silicification reduced the proto-pore and secondary pore.The constructive diagenesis such as Dolomitization,dissolusion,fracture diagenesis and recrystallization led the proto lith forming lots of secondary pores,and improved the reservoir capability accordingly.Reservoirs of Changxing formation mainly exist in dolomites or calcite dolomites which have relations with burial dolomitization.Burial dolomitization is a key factor to the forming of reservoir of Changxing formation.

关 键 词：成岩作用 储层 长兴组 涪陵地区 

分 类 号：P59[天文地球—地球化学]