摘要
运用岩心观察、铸体薄片鉴定、扫描电镜分析、物性测试、压汞分析等实验方法,以阜康凹陷东部斜坡带二叠系梧桐沟组储集层为研究对象,探讨其储层特征及控制因素,并对储层进行分类评价。研究表明:梧桐沟组储层以岩屑砂岩及长石岩屑砂岩为主,粒度较细,分选磨圆较差,成分与结构成熟度低;储层原生孔隙发育,具有一定量的次生溶孔及微裂缝,发育微米级孔喉,物性较好,属于中孔中低渗储层;通过研究区成岩作用类型及强度的定量分析,共识别出8种成岩相类型。研究区储层物性及孔喉结构主要受岩相及成岩相控制,共划分出29种岩相成岩相组合,结合油田实际产能,将研究区储层划分为四类,从一类到四类,储层物性、孔喉结构及产油情况逐渐变差。
The study area is located in the eastern slope of Fukang sag, Junggar basin, where the Permian reservoirs have a good exploration prospect. Through the approaches of cores observation, casting thin section identification, SEM and mercury intrusion analyses, we discussed the characteristics and controlling factors of the Permian reservoirs in the eastern slope of Fukang sag, and then conducted the reservoir evaluation and classification. The results show that, compared to the sedimentary and metamorphic rock debris, volcanic rock debris are the majority in Wutonggou Formation. The particle size is fine with poor sorting and grinding and low composition and structure maturity. Primary pores are the mainly reservoir spaces, the certain amounts of secondary dissolution pores and microfractures can also provide some spaces for hydrocarbon accumulation. The reservoir properties are dominated by moderate porosity and moderate-low permeability. Subsequently, we could recognize four types of diagenesis:compaction, dissolution, cementation and replacement in the research area. Eight types of diagenetic facies were identified through the quantitative analysis on diagenesis. The reservoir properties and pore throat structures in the research area are controlled by lithofacies and diagenetic facies, which were classified into 29 types. Based on the above analyses and combining with the actual oilfield production capacity, we divided the reservoirs into 4 types. From type 1 to type 4, the reservoir properties, pore throat structure and oil production capacity become worse and worse.
作者
林敉若
操应长
葸克来
王健
陈洪
吴俊军
Lin Miruo;Cao Yingchang;Xi Kelai;Wang Jian;Chen Hong;Wu Junjun(School of Geosciences,China University of Petroleum,Qingdao 266580,Shandong,China;Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,Xinjiang,China)
出处
《吉林大学学报(地球科学版)》
EI
CAS
CSCD
北大核心
2018年第4期991-1007,共17页
Journal of Jilin University:Earth Science Edition
基金
国家自然科学基金项目(41402095)
博士后创新人才支持计划(BX201600154)
中央高校资助创新计划项目(16CX02027A)~~
关键词
阜康凹陷
梧桐沟组
储集物性
孔隙结构
成岩作用
控制因素
Fukang sag
Wutonggou Formation
reservoir physical properties
pore structure
diagenesis
controlling factor