气藏注CO_(2)提高采收率及封存评价方法研究进展  

Review of Gas Reservoir CO_(2)Injection for Enhanced Recovery and Sequest Ration Evaluation Methods

作　　者：曹成 陈星宇 张烈辉 赵玉龙 文绍牧[2] 赵梓寒 杨勃 朱浩楠 CAO Cheng;CHEN Xing-yu;ZHANG Lie-hui;ZHAO Yu-long;WEN Shao-mu;ZHAO Zi-han;YANG Bo;ZHU Hao-nan(Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,China;Southwest Oil&Gasfield Company,PetroChina,Chengdu 610501,China;Exploration and Development Research Institute,Southwest Oil&Gasfield Company,PetroChina,Chengdu 610041,China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]中国石油西南油气田分公司,成都610051 [3]中国石油西南油气田分公司勘探开发研究院,成都610041

出　　处：《科学技术与工程》2024年第18期7463-7475,共13页Science Technology and Engineering

基　　金：国家自然科学基金联合基金重点项目(U23A2022)。

摘　　要：CO_(2)利用与封存是CCUS的两个重要环节,其中CO_(2)-EGR技术对于实现绿色碳减排与天然气增产的双重目标具有巨大的发展潜力。梳理了CO_(2)提高天然气采收率及封存机理、CO_(2)提高天然气采收率及封存的潜力与评价方法。结果表明:CO_(2)提高天然气采收率机理主要为:物性差异、竞争吸附及筛滤置换作用、连续对流排驱作用、恢复气藏压力与抑制水侵作用以及储层溶蚀改造作用;CO_(2)气藏封存机理包括构造封存、残余气封存、溶解封存以及矿化封存;CO_(2)提高天然气采收率评价方法有数值模拟评价、理论评价、物理实验评价;气藏CO_(2)封存评价方法包括有效容积法、物质平衡法、数值模拟评价、理论评价等;尽管CO_(2)提高天然气藏采收率及封存评价方法已初步建立,但适用范围仍较小,需要结合中国天然气藏地质特征进一步完善,提高封存评价准确性。CO_(2)-EGR technology,as a critical element within the framework of CCUS(CO_(2)capture,utilization,and storage),is recognized for its substantial potential in accomplishing the dual objectives of reducing carbon emissions and augmenting natural gas production.The mechanisms through which CO_(2)enhances natural gas recovery and storage were comprehensively outlined,along with an examination of the associated potential and evaluation methodologies.Key findings indicate that CO_(2)improves natural gas recovery rates through mechanisms such as physical property differences,competitive adsorption,screening displacement,continuous convection displacement,restoration of gas reservoir pressure,and inhibition of water invasion.Additionally,the sealing mechanisms of CO_(2)in gas reservoirs encompass structural sealing,residual gas sealing,dissolution sealing,and mineralization sealing.The evaluation methods for CO_(2)-enhanced natural gas recovery rates include numerical simulation,theoretical analysis,and physical experiments.Similarly,methods for assessing CO_(2)storage in gas reservoirs involve the effective volume method,material balance method,numerical simulation,and theoretical evaluation.While the potential of CO_(2)to enhance natural gas recovery is established,and preliminary evaluation methods are outlined,current applicability remains limited.Further refinement is deemed essential,particularly in consideration of the geological characteristics of natural gas reservoirs in China,to enhance the accuracy of storage assessments.Continuous research efforts are acknowledged as imperative to broaden the scope of application and optimize evaluation methodologies within this field.

关 键 词：CO_(2)-EGR 气藏CO_(2)封存 驱气机理 封存机理 评价方法 

分 类 号：TE377[石油与天然气工程—油气田开发工程]