多孔介质中CO2埋存机理物理模拟实验评价

Physical Simulation Experiment on CO2 Storage Mechanism in Porous Media

阮洪江 张乔良 刘峰 鲁瑞彬 陈珍妮 张捷方 吴畅

Hongjiang RUAN Qiaoliang ZHANG Feng LIU Ruibin LU Zhenni CHEN Jiefang ZHANG Chang WU

中海石油（中国）有限公司湛江分公司，广东 湛江 524000 西安石油大学 石油工程学院，陕西 西安 710065

Zhanjiang Branch，CNOOC China Limited，Zhanjiang Guangdong 524000，China College of Petroleum Engineering，Xi'an Shiyou University，Xi'an Shaanxi 710065，China

为了弄清高温高压多孔介质中CO2的埋存机理，采用室内物理模型，对多孔介质中CO2埋存机理进行了物理模拟实验评价。结果表明，CO2溶解埋存主要受温度、压力和地层水矿化度的影响；CO2溶于地层水后与岩石中的矿物发生矿化反应，反应前后岩石矿物质量分数发生显著变化；气水交替驱可有效地延缓CO2的突破，提高CO2埋存率，从而提高原油采收率。

In order to understand the mechanism of CO2 dissolved buried mechanism in high temperature and high pressure porous environment,physical simulation experiment was conducted to study CO2 dissolved buried mechanism,mineralization buried mechanism and free buried mechanism in porous media by means of indoor physical model experiment.The results show that the solubility of CO2 in formation water is mainly affected by temperature, pressure and salinity of formation water. CO2 dissolved in formation water will mineralize with minerals in rocks, and the mineral content of rocks will change significantly before and after the reaction. The long core displacement experiment characterized the amount of free CO2 storage and the oil displacement effect. The experiment reveal that CO2 flooding in porous media has dual effects of burying and enhancing oil recovery.

国家自然科学基金项目(51804253)

10.12422/j.issn.1672-6952.2024.02.006