成都气田蓬莱镇组储层特征与成岩作用  

Reservoir characteristics and diagenesis of Jurassic Penglaizhen Formation in Chengdu Gas Field,Sichuan Basin,China

作　　者：宁萌萌 杨豫川 李凤杰[1] NING Mengmeng;YANG Yuchuan;LI Fengjie(State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;Regional Geological Surveying Team, Sichuan Bureau of Geology & Mineral Resources, Chengdu 610213, China;No.207 Geological Team, Sichuan Bureau of Geology & Mineral Resources, Leshan 614000, China)

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]四川省地质矿产勘查开发局区域地质调查队,成都610213 [3]四川省地质矿产勘查开发局二零七地质队,四川乐山614000

出　　处：《成都理工大学学报（自然科学版）》2022年第3期294-303,共10页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家科技重大专项(2016ZX05048004-001)。

摘　　要：探讨川西拗陷成都气田侏罗系蓬莱镇组的储层特征及成岩演化过程,为勘探开发工作提供依据。通过岩心观察、铸体薄片鉴定、X射线衍射、扫描电镜等手段,对蓬莱镇组储层特征及成岩作用进行分析。蓬莱镇组储层以岩屑砂岩及岩屑石英砂岩为主,属于中低孔近致密储层;孔隙类型多样,次生溶孔的发育是蓬莱镇组成藏的关键;压实作用、胶结作用、溶解或溶蚀作用等成岩作用对储层改造较大,其中压实与胶结作用不利于储层的发育,溶蚀增孔是储层发育的有利因素。蓬莱镇组属于晚成岩期B,胶结作用、充填作用较强,大量方解石充填或胶结,是储层致密化的重要因素。By means of core observation,casting thin section identification,X-ray diffraction and scanning electron microscopy analysis,the reservoir characteristics and diagenesis of Jurassic Penglaizhen Formation in Chengdu Gas Field of western Sichuan depression are analyzed,in order to reveal the reservoir characteristics and diagenesis evolution process and to provide basis for future exploration and development.The Penglaizhen Formation reservoir is mainly composed of lithic sandstone and lithic quartz sandstone,and belongs to medium and low porosity tight reservoir.The development of secondary dissolved pores is the key to the formation of reservoir in Penglai Town area.Diagenesis,such as compaction,cementation,dissolution or solution,plays an important role in reservoir transformation,among which compaction and cementation are not conducive to the development of reservoir,while dissolution pores are favorable factors for reservoir development.The study shows that the Penglaizhen Formation is characteristic of late diagenetic stage B,with strong cementation and filling,and a large amount of calcite filling or cementation is an important factor of reservoir densification.

关 键 词：致密砂岩 储层致密化 成岩序列 成都气田 蓬莱镇组 

分 类 号：TE122.23[石油与天然气工程—油气勘探] P588.21[天文地球—岩石学]