渤海湾盆地富林洼陷古近系沙三段储层特征及油气主控因素  

Reservior characteristics and main controlling factors of the third member of Paleogene Shahejie Formation in Fulin sag,Bohai Bay Basin

作　　者：张琼 徐文礼[1] 徐姁 文华国[1,4] 张琳璞 郭耿生 何川[6] ZHANG Qiong;XUWenli;XU Xu;WEN Huaguo;ZHANG Linpu;GUO Gengsheng;HE Chuan(Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,Sichuan,China;China National Petroleum Corporation,Beijing 100007,China;Chongqing Gas Field,Southwest Oil and Gas Field Branch,Chongqing 404100,China;State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering,Chengdu University of Technology,Chengdu 610059,Sichuan,China;Petroleum Development Center Co.,Ltd.of Shengli Oil Field,Dongying 257000,Shandong,China;Exploration and Development Research Institute of Petro China Dagang Oilfield Company,Tianjin 300280,China)

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]中国石油天然气股份有限公司,北京100007 [3]西南油气田分公司重庆气矿,四川重庆404100 [4]油气藏地质及开发工程国家重点实验室(成都理工大学),四川成都610059 [5]胜利油田石油开发中心有限公司,山东东营257000 [6]中国石油大港油田分公司勘探开发研究院,天津300280

出　　处：《中国地质》2023年第2期543-556,共14页Geology in China

基　　金：国家自然科学基金(41972109)资助。

摘　　要：【研究目的】古近系沙河街组三段是渤海湾盆地济阳坳陷沾化凹陷富林洼陷最为重要的产油气层位,加强沙河街组三段储层特征研究,分析储层发育主控因素,对该地区沙河街组油气勘探开发具有重要的科学和指导意义。【研究方法】本论文在岩心观察基础上,结合薄片鉴定、扫描电镜及物性资料分析,对渤海湾盆地沾化凹陷富林洼陷古近系沙河街组三段砂岩的储层特征及其主控因素进行了详细研究。【研究结果】结果表明:该套砂岩主要以长石岩屑砂岩、岩屑长石砂岩为主,具有低成分成熟度、较低结构成熟度,反映典型的近物源快速沉积特征;储层储集空间类型主要为残余原生粒间孔、粒间溶孔及粒内溶孔,以低—中孔、超低渗孔隙型储层为主,优质储层发育受沉积微相和成岩作用控制,沉积微相是优质储层发育基础,胶结作用和溶蚀作用是优质储层发育关键因素。【结论】(1)该研究区岩石类型主要为长石岩屑砂岩和岩屑长石砂岩;(2)总体属于低—中孔、超低渗型储层;(3)研究区优质储层主要分布在辫状河三角状分流河道和河口坝;(4)压实作用和胶结作用是研究区内主要的破坏性成岩作用,溶蚀作用对储层物性具有建设性的成岩作用。This paper is the result of oil and gas exploration engineering.[Objective]The third member of Shahejie Formation of the Paleogene is the most important oil and gas horizon in Fulin sag,Zhanhua sag,jiyang sag,Bohai Bay Basin,and it has the essential scientific and guiding significance of strengthening the reservoir characteristics of Shahejie Formation,analyzing the main controlling factors of the reservoir,and guiding the reservoir prediction and oil and gas exploration engineering and resources of Shahejie Formation in the area.[Methods]Based on the petrography and reservoir physical property data,this paper is aiming to dicipher the origin of the sandstone reservoirs of Paleogene Shahejie Formation the Zhanhua sag,Bohai Bay basin.[Results]The thin sections observation and sem analysis show that the lithofacies of the reservoirs are consist of feldspathic lithic sandstone and lithic feldspar sandstone,with low compositional and structural maturities,indicating that they rapidly deposited in the environment proximal to provenance.The reservoir space type of the reservoir is mainly residual primary intergranular pores,intergranular solution pores and intragranular solution pores,mainly low medium porosity and ultra-low permeability pore type reservoirs.The development of high-quality reservoirs is controlled by sedimentary microfacies and diagenesis.The sedimentary microfacies are the basis for the development of high-quality reservoirs,and cementation and dissolution are the key factors for the development of high-quality reservoirs.[Conclusions](1)The rock types in the study area were mainly feldspathic lithic sandstone and lithic feldspar sandstone.(2)It is generally a low-to-mesoporous and ultra-low permeability reservoir;(3)High-quality reservoirs in the study area are mainly distributed in braided river delta distributary channels and estuarine bars;(4)Compaction and cementation are the main destructive diagenesis in the study,while dissolution has constructive diagenesis on reservoir physical properties.

关 键 词：砂岩储层 成岩作用 主控因素 沙河街组三段 富林洼陷 油气勘探工程 济阳 山东 

分 类 号：P618.13[天文地球—矿床学]