SⅢ致密砂岩储层微观孔隙结构及渗流特性研究  

Study on Microscopic Pore Structure and Seepage Characteristics of SⅢ Tight Sandstone Reservoir

作　　者：张继红[1] 徐鹏[1] 谭欣剑 何庆斌[1] 孙振鑫 司勇[1] 陈喜玲[2] ZHANG Ji-hong;XU Peng;TAN Xin-jian;HE Qing-bin;SUN Zhen-xin;SI Yong;CHEN Xi-ling(Key Laboratory of EOR of Ministry of education,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Liaohe Oilfield Exploration and Development Research Institute,Panjin Liaoning 124010,China)

机构地区：[1]东北石油大学提高采收率教育部重点实验室,黑龙江大庆163318 [2]辽河油田勘探开发研究院,辽宁盘锦124010

出　　处：《当代化工》2022年第12期2903-2906,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金,非均质中低渗透油藏凝胶调驱井区筛选方法研究与应用(项目编号:51874096)。

摘　　要：开展了致密砂岩储层微观孔隙结构特征及渗流特性测试,旨在为SⅢ致密砂岩储层后续高效开采提供重要的理论基础。高压压汞实验结果表明:SⅢ致密砂岩储层孔隙结构按照储层物性综合评价,可划分为Ⅰ、Ⅱ、Ⅲ类,主要以Ⅰ类孔隙类型为主;Ⅰ类孔隙岩心储层分选性较差(4.17)、排驱压力较低(0.49MPa)且最大进汞饱和度较高(74.55%),连通性较好。低速渗流实验结果表明:渗流过程中存在启动压力;储层存在水敏性;单相气、油、水启动压力梯度均与渗透率和孔隙度之间呈幂指数相关;SⅢ致密砂岩储层不适宜采用水驱而适宜采用气驱开发方式进行有效开发。Microscopic pore structure characteristics and seepage characteristics tests of tight sandstone reservoir were carried out, in order to provide an important theoretical basis for subsequent efficient exploitation of SⅢ tight sandstone reservoir. The results of high-pressure mercury injection test showed that the pore structure of SIII tight sandstone reservoir could be divided into class Ⅰ, class Ⅱ and class Ⅲ, and the main type of pore was the class Ⅰ. The pore core of class Ⅰ reservoir had poor sorting(4.17), low displacement pressure(0.49MPa), high maximum mercury saturation(74.55%) and good connectivity. The low-velocity seepage experiment results showed that there was start-up pressure in the seepage process. The reservoir had water sensitivity. The start-up pressures of gas, oil and water were exponentially correlated with permeability and porosity. Water flooding was not suitable for SⅢ tight sandstone reservoir, but gas flooding was suitable for effective development.

关 键 词：致密砂岩 微观孔隙结构 启动压力 渗流能力 

分 类 号：TE348[石油与天然气工程—油气田开发工程]