摘要
针对滨里海盆地东缘塔克尔构造石炭系台内滩储层的分类及其主控因素进行分析。综合测井、岩心、地震等资料,系统地阐述台内滩储层的沉积特征、储集空间类型、储层分类及控制因素。研究区台内滩类型主要有生屑藻屑滩、有孔虫滩、鲕粒滩、砂屑滩等4种,次生溶蚀孔洞、粒间溶孔、晶间溶孔为其主要储集空间,另有部分原生粒间孔、体腔孔、铸模孔等。滩相储层划分为孔洞缝型、裂缝孔隙型、孔隙型。其中,孔洞缝型储层具有孔隙度高、渗透性好等特点,是研究区内最好的储层,构造及溶蚀微裂缝对于储层有效性的影响意义重大。研究区储层发育及分布状况受到古地貌、溶蚀作用及裂缝发育等多种因素的控制。古地貌相对高部位呈现水体浅、能量强的优势,有利于各种台内滩相的沉积;次生溶蚀孔隙、孔洞及张开缝、构造溶缝等,对于储层空间的扩容及沟通具有积极作用。
In this paper,the classification and main controlling factors of Carboniferous intra-platform shoals Takyr structure in the eastern margin of the Precaspian Basin are analyzed.Based on the logging,core,seismic data,the sedimentary characteristics,reservoir space types,reservoir classification and control factors of intra-platform shoal reservoirs are systematically described.Four main types of bioclastic/algal,foraminiferal,oolitic and sandy clastic shoals were developed in the study area.Secondary intragranular,intergranular dissolved pores and intercrystal pore are the important reservoir spaces.In addition,there are primary intergranular pores,body cavity pores,mold holes,etc.The shoal facies reservoirs in the study area are divided into three types:pore vug fracture type,fracture pore type and pore type.The pore vug fracture type reservoir is the best reservoir with high porosity and good permeability.The structure and dissolution micro-fractures are of great significance for reservoir effectiveness.The development and distribution of reservoirs are obviously controlled by paleogeomorphology,dissolution and fracture development.The wave energy is strong with shallow water in the relatively high position which is favorable for the deposition of different kinds of shoals.The secondary dissolution pores and vugs and multiple types of structural fractures,such as open fractures and structural dissolution fractures,play a positive role in the expansion and communication of reservoir space.
作者
吴嘉鹏
程晓东
金树堂
范乐元
郭凯
盛善波
冉怀江
WU Jiapeng;CHENG Xiaodong;JIN Shutang;FAN Leyuan;GUO Kai;SHENG Shanbo;RAN Huaijiang(International Company of China Petroleum Logging Company,CNPC,Beijing 100101,China;Aktyubin Oil/Gas Ltd.,CNPC,Aktyubin 030000,Kazakstan)
出处
《重庆科技学院学报（自然科学版）》
CAS
2021年第4期10-17,共8页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
中国石油天然气集团公司海外重大科技项目“海外天然气复杂储层精细评价与预测技术”(2018D-4305)
中国石油集团测井公司科技项目“哈萨克复杂碳酸盐岩岩性圈闭识别优选及井位部署”(CPL 2021-B04)。
关键词
滨里海盆地
石炭系
台内滩
有利储层
主控因素
Precaspian Basin
Carboniferous
intra-platform shoal
favorable reservoir
controlling factors
