基于粒子群算法的低渗油藏CO_(2)驱油与封存自动优化  

An automatic optimization method of CO_(2) injection for enhanced oil recovery and storage in low permeability reservoirs based on particle swarm optimization algorithm

作　　者：丁帅伟 席怡[4,5] 刘骞 张蒙 纪林林 于红岩 高彦芳[1,2,3] DING Shuaiwei;XI Yi;LIU Qian;ZHANG Meng;JI Linlin;YU Hongyan;GAO Yanfang(Department of Geology,Northwest University,Xi an 710069,China;Shaanxi Key Laboratory for Carbon Neutral Technology,Northwest University,Xi an 710069,China;State Key Laboratory for Continental Dynamics,Northwest University,Xi an 710069,China;Exploration and Development Research Institute,Changqing Oilfield Company,PetroChina,Xi an 710018,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil&Gas Fields,Xi an 710018,China)

机构地区：[1]西北大学地质学系,陕西西安710069 [2]陕西省碳中和技术重点实验室,陕西西安710069 [3]西北大学大陆动力学国家重点实验室,陕西西安710069 [4]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [5]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《中国石油大学学报（自然科学版）》2022年第4期109-115,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：陕西省自然科学基础研究计划-青年项目(2021JQ-454);陕西省自然科学基础研究计划-基础研究定向委托项目(2021JCW-04);国家自然科学基金青年项目(41902145);西北大学地质学基地科研训练及科研能力提高项目(J1310029)。

摘　　要：为提高CO_(2)驱油与封存工程的优化效果,实现不同优化目标的最大化,提出基于粒子群算法和数值模拟技术的低渗油藏CO_(2)驱油与封存自动优化方法,并以陕北某低渗油藏典型井组为例,进行优化方法的适应性分析,选择最优的注入方式。结果表明:不同注入方式和目标函数下的敏感性影响参数不同,试凑法无法满足多参数耦合条件下的优化研究;为了获得较高的净现值和累积产油量,可采用早期注入CO_(2)和较低生产井井底压力下限的工作制度,而为了最大限度的埋存CO_(2),可采用稍晚注入CO_(2)和较高生产井井底压力下限的工作制度;CO_(2)驱连续注入更有利于CO_(2)埋存,而CO_(2)驱水气交替注入(段塞比减小)更有利于提高采收率。In order to improve the optimization of CO_(2) flooding and storage and maximize different optimization objectives,an automatic optimization method of CO_(2) flooding and storage in low permeability reservoirs based on particle swarm optimization algorithm and numerical simulation technique was proposed.A typical well group in a low permeability reservoir in northern Shaanxi was taken as an example to analyze the adaptability of the optimization method.The results show that the sensitivity parameters under different injection methods and different objective functions are different,so the trial-and-error method cannot meet the optimization requirement under the condition of multi-parameter coupling.In order to obtain a higher net present value and cumulative oil production,it is recommended to inject CO_(2) early and maintain a lower bottom hole pressure of the producing wells.In order to maximize CO_(2) storage,it is recommended to inject CO_(2) later and maintain a higher bottom hole pressure of the producing wells.An optimal CO_(2) injection method can be selected according to the interests of different operators.Continuous gas injection is more conducive to CO_(2) storage,while tapered water-alternating-gas injection is more conducive to enhanced oil recovery.

关 键 词：低渗油藏 粒子群算法 自动优化 CO_(2)驱油 CO_(2)地质封存 

分 类 号：TE348[石油与天然气工程—油气田开发工程]