新疆塔中油田中古58井寒武系芙蓉统白云岩储层特征  

RESERVOIR CHARACTERISTICS OF LATE CAMBRIAN DOLOMITES IN THE WELL ZHONGGU-58, TAZHONG OIL FIELD,XINJIANG, NW CHINA

作　　者：李一苇 张云峰[1,2] 姜晨光 杨俊丰 麦麦江·胡吉[5] 屈海洲 李越[6] LI Yi Wei;ZHANG Yun Feng;JIANG Chen Guang;YANG Jun Feng;HUJI Mai Mai Jiang;QU Hai Zhou;LI Yue(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500;Southwest Petroleum University,Division of Key Laboratory of Carbonate Reservoir,CNPC,Chengdu 610500;Research Institute of Experiment and Detection of PetroChina Tarim Oilfield Company,Korla 841000;Research Institute of Exploration and Development of PetroChina Tarim Oilfield Company,Korla 841000;Technology Department of PetroChina Tarim Oilfield Company,Korla 841000;State Key Laboratory of Paleobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment,Chinese Academy of Sciences,Nanjing 210008)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]中国石油碳酸盐岩储层重点实验室西南石油大学分室,四川成都610500 [3]中国石油塔里木油田公司实验检测研究院,新疆库尔勒841000 [4]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [5]中国石油塔里木油田公司油气生产技术部,新疆库尔勒841000 [6]中国科学院南京地质古生物研究所和生物演化与环境卓越创新中心,现代古生物学和地层学国家重点实验室,江苏南京210008

出　　处：《地层学杂志》2021年第4期506-513,共8页Journal of Stratigraphy

基　　金：国家自然科学基金青年基金(41702122);中国科学院战略性先导科技专项(B类)(XDB26000000)共同资助。

摘　　要：塔里木板块广泛分布的寒武系白云岩储层具重要的油气勘探潜力。塔中油田I号断裂带的中古58井寒武系芙蓉统下丘里塔格群白云岩在区域上有代表性,具有孔隙规模大且储层物性好的优势。储集空间类型包括小型溶洞、溶孔、晶间孔、晶间溶孔及裂缝等,常充填石英、隐晶质硅质、白云石、萤石、黄铁矿、闪锌矿、方解石并呈现明显的充填次序;有效储层包括原生孔隙及准同生成岩阶段—浅埋藏阶段的溶蚀和白云化作用所形成的次生孔隙;中—深埋藏成岩阶段的热液溶蚀在改造部分储集空间的同时,也表现为多种矿物充填过程。The wide-spreading Late Cambrian(Furongian) dolomites have served as essential petroleum reservoirs in Tarim Block of NW China, and are of great significance for petroleum-gas explorations. The Well Zhonggu-58, situated in the Fault 1 of the Tazhong Oil Field, is a regional representative case of reservoir studies. In the well, crystalline dolomites of the Lower Qiulitag Group(Furongian of Cambrian in age) are well developed, and therefore provide important information for insight into the porosities and their evolution. Our analyses show that these reservoirs are of very high porosity and permeability. The types of reservoir spaces include small solution vugs, dissolution pores, intercrystalline pores, intercrystalline dissolution pores, and fractures. In the reservoir space, the filling sequence of minerals seems to be quartz, cryptocrystalline silica,dolomite, fluorite, pyrite, sphalerite and calcite, respectively. Effective reservoirs include primary pores and secondary pores formed by dissolution and dolomitization during the penecontemporaneous diagenesis stage and the subsequent shallow burial stages. The physical properties of the reservoirs were modified, in the diagenetic stage of middle-deep burial, by hydrothermal dissolution accompanied by precipitation and filling of various minerals.

关 键 词：白云岩储层 成岩作用 孔隙演化 寒武系 塔里木板块 

分 类 号：P534.41[天文地球—古生物学与地层学]