低渗透平面非均质油藏注采井布井方式对CO_(2)驱开发效果的影响  

Influence of injector⁃producer deployment pattern on development effect of CO_(2) flooding in low⁃permeability reservoirs with areal heterogeneity

作　　者：李政 吕文峰[1,2] 王宏志 李敏 陈天戈[1,2] 郑自刚 LI Zheng;LÜWenfeng;WANG Hongzhi;LI Min;CHEN Tiange;ZHENG Zigang(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;State Key Laboratory of Enhanced Oil Recovery,Beijing 100083,China;Downhole Service Company of PetroChina Daqing Oilfield Co.,Ltd.,Daqing 163458,China;Exploration and Development Research Institute of PetroChina Daqing Oilfield Co.,Ltd.,Daqing 163712,China;Research Institute of Exploration and Development of PetroChina Changqing Oilfield Company,Xi’an 710018,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]提高油气采收率全国重点实验室,北京100083 [3]中国石油大庆油田有限责任公司井下作业分公司,黑龙江大庆163458 [4]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [5]中国石油长庆油田公司勘探开发研究院,陕西西安710018

出　　处：《大庆石油地质与开发》2024年第1期149-157,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项“二氧化碳规模化捕集、驱油与埋存全产业链关键技术研究及示范”之课题3“CCUS驱油地质体精细描述及油藏工程关键技术研究”(2021ZZ01-03)。

摘　　要：中国陆相沉积低渗透油藏在平面上因受到不同沉积微相分布的影响,储层有效厚度、渗透率平面非均质性较强,实施CO_(2)驱的效果受注采井平面相对位置的影响较大。为探索合理的布井方式,改善开发效果,采用数值模拟方法,以大庆榆树林油田某注CO_(2)试验区的典型地质油藏参数和注采参数为依据建立理论模型,得到了不同平面非均质性、不同注采井布井方式下的CO_(2)驱开发规律。结果表明:CO_(2)驱注采井布井方式为“高渗注低渗采”和“厚注薄采”时的整体开发效果优于“低渗注高渗采”和“薄注厚采”;储层平面非均质性越强,不同布井方式下的开发效果差异越明显。研究成果可为低渗透平面非均质油藏CO_(2)驱注采井位的优化设计与调整提供重要参考。Continental low-permeability reservoirs in China are characterized by high areal heterogeneity of net pay thickness and permeability caused by areal distribution of different sedimentary microfacies.CO_(2) flooding perfor⁃mance is much affected by areal relative location deployment of injectors and producers.In order to explore rational well pattern to improve development effect,a theoretical model is established via numerical simulation based on typ⁃ical reservoir and injection-production parameters of a CO_(2) flooding test area in Yushulin oilfield in Daqing,getting development laws of CO_(2) flooding with different areal heterogeneities and different injector-producer deployment patterns.The results show that,when well pattern of injector-producer in CO_(2) flooding is“injector in high-permeability area and producer in low-permeability area”and“injector in thick area and producer in thin area”,overall develop⁃ment effect is better than well patterns of“injector in low-permeability area and producer in high-permeability area”and“injector in thin area and producer in thick area”.The higher the areal reservoir heterogeneity is,the more ob⁃vious the difference of development effect by different injector-producer patterns is.The research provides important reference for optimization design and adjustment of injector-producer patterns for CO_(2) flooding in low-permeability reservoirs with areal heterogeneity.

关 键 词：CO_(2)驱油 低渗透油藏 平面非均质性 布井方式 数值模拟 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]