黏土矿物对于储层敏感性的影响与控制作用——以庆阳合水地区长6超低渗砂岩储层为例  

The influence and control effect of clay minerals on reservoir sensitivity taking Chang 6 ultra-low permeability sandstone reservoir in Heshui Area as an example

作　　者：张景军[1] 刘瑞鹏 王利军 高梦晨 刘洪宏 ZHANG Jingjun;LIU Ruipeng;WANG Lijun;GAO Mengchen;LIU Honghong(School of Earth Science,Northeast Petroleum University,Daqing 163318,Heilongjiang,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《矿产勘查》2023年第1期1-8,共8页Mineral Exploration

基　　金：国家自然科学基金项目“鄂尔多斯盆地延长组长6粘土矿物类型分布规律及对开发影响分析”(41472125)资助。

摘　　要：以鄂尔多斯盆地合水地区长6超低渗透砂岩储层为例,综合应用储层敏感性、扫描电镜、X射线衍射等实验技术方法,系统研究了储层敏感性类型及损害程度,并深入地探讨了黏土矿物对于长6储层敏感性的影响与控制作用。结果表明:(1)长6油层的储层敏感性整体表现为中等偏强水敏性和速敏性、弱酸敏性、强盐敏性以及中等偏弱碱敏性的五敏特征;(2)储层黏土矿物主要有高岭石、伊利石、绿泥石以及伊蒙混层等4种类型,且以伊利石含量最高;(3)储层敏感性及其程度明显受控于黏土矿物类型及其含量,并且具有黏土矿物含量越高、储层敏感性越强的特点。本研究成果将为合水地区长6油层注水开发过程中有效保护储层以及提高采收率提供重要的参考依据。Taking the Chang 6 ultra-low permeability sandstone reservoir in the Heshui area of the Ordos Basin as an example, the comprehensive application of reservoir sensitivity, scanning electron microscopy, X-ray diffraction and other experimental techniques have systematically studied the type of reservoir sensitivity and the degree of damage, and in-depth discussion of the influence and control effect of clay minerals on the sensitivity of Chang 6 reservoir. The results show that:(1)The reservoir sensitivity of Chang 6 reservoir is generally characterized by medium to strong water sensitivity and velocity sensitivity, weak acid sensitivity, strong salt sensitivity and medium to weak alkali sensitivity;(2)the reservoir clay minerals mainly include kaolinite, illite, chlorite, and imonite mixed layers, among which illite has the highest content;(3)the reservoir sensitivity and its degree are obviously controlled by the type and content of clay minerals, and the higher the content of clay minerals, the stronger the sensitivity of the reservoir. The results and understandings obtained in this research will provide an important reference for the effective protection of the reservoir and the enhancement of recovery factor during the water injection development process of the Chang 6 reservoir in the Heshui area.

关 键 词：储层敏感性 黏土矿物 长6储层 合水地区 鄂尔多斯盆地 

分 类 号：TE348[石油与天然气工程—油气田开发工程]