鄂尔多斯盆地靖边地区延长组长6储层敏感性研究  

Study on the Sensitivity of Chang 6 Reservoir in Jingbian District,Ordos Basin

作　　者：张宇 张瑶瑶[1] 王慧萍[1] 杜巧萍 罗旭东 赵振华 ZHANG Yu;ZHANG Yaoyao;WANG Huiping;DU Qiaoping;LUO Xudong;ZHAO Zhenhua(Jingbian Oil Production Plant of Yanchang Oilfield Co.Ltd.,Jingbian Shaanxi 716000,China;College of Geology and Environment,Xi′an University of Science and Technology,Xi′an 710065,China)

机构地区：[1]延长油田股份有限公司靖边采油厂,陕西靖边716000 [2]西安科技大学地质与环境学院,西安710054

出　　处：《重庆科技学院学报（自然科学版）》2022年第4期30-35,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

摘　　要：以储层岩石学、物性及孔隙结构等特征为基础,依托天然岩心开展储层敏感性实验。实验结果表明,靖边地区长6储层敏感性总体具有中等偏强—强碱敏、中等偏弱速敏、中等偏弱水敏、弱酸敏、弱盐敏等特点。储层中等偏强—强碱敏性主要是由储层中铝硅酸盐矿物的溶蚀造成;较低的伊利石和高岭石含量是储层中等偏弱速敏性的主要原因;蒙脱石含量较低、伊蒙混层与伊利石不甚发育,导致储层的水敏性和盐敏性均较弱;绿泥石的赋存对储层酸敏性的影响明显。Based on the characteristics of reservoir petrology,physical property and pore structure,the reservoir sensitivity experiments are carried out on natural cores to discuss the characteristics and formation mechanism of reservoir sensitivity.The results show that the sensitivity of Chang 6 reservoir in Jingbian area is characterized by medium to strong alkali sensitivity,medium to weak velocity sensitivity,medium to weak water sensitivity,weak acid sensitivity and weak salt sensitivity.The medium-strong alkali sensitivity is mainly caused by the dissolution of aluminum silicate minerals in the reservoir.Low illite and kaolinite content is the main reason of medium and weak velocity sensitivity of reservoir.Low montmorillonite content and low illite montmorillonite mixed layer development result in weak water sensitivity and salt sensitivity of reservoirs.The occurrence of chlorite has obvious influence on the acid sensitivity of reservoir.

关 键 词：低渗透砂岩 靖边地区 长6储层 储层敏感性 

分 类 号：TE112.23[石油与天然气工程—油气勘探]