考虑变周期注气量和经济效益的致密油藏CO_(2)吞吐注采参数优化  

Optimization of injection-production parameters of CO_(2) huff and puff in tight reservoirs considering variable cycle gas injection and economic benefits

作　　者：牛子敬 赵忠军[3] 张园 胡景宏[1,2] Niu Zijing;Zhao Zhongjun;Zhang Yuan;Hu Jinghong(China University of Geosciences(Beijing),Beijing 100083,China;Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering,Beijing 100083,China;PetroChina Changqing Oilfield Company,Xi′an,Shaanxi 710018,China)

机构地区：[1]中国地质大学(北京),北京100083 [2]北京市非常规天然气能源地质评价与开发工程重点实验室,北京100083 [3]中国石油长庆油田公司,陕西西安710018

出　　处：《特种油气藏》2024年第6期114-119,共6页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“基于气-液硫-固硫复杂相变的深层高含硫气藏渗流机理研究”(52074248),“纳米孔隙约束的凝析气藏气液相平衡与流动机制”(52474052);北京市科协“2023—2025年度青年人才托举工程”(BYESS2023414);中央高校基本科研项目“非常规油气高精度勘探与开发关键技术体系构建”(2652022207)。

摘　　要：CO_(2)吞吐是致密油藏提高采收率的重要手段,但在实施过程中,CO_(2)吞吐换油率随吞吐周期增加而降低。为提高CO_(2)吞吐换油率,改善CO_(2)吞吐开发效果,采用数值模拟方法,进行变周期注气量的CO_(2)吞吐注采参数优化研究,并开展经济评价。结果表明:变周期注气量的吞吐方案累计产油量为32983.4 m^(3),换油率为1.11,高于正交实验的优选方案。经济评价结果显示,变周期注气量的CO_(2)吞吐方案经济效益最好,其净现值为345.07×10^(4)元,内部收益率为18.06%。该研究成果可为致密油藏CO_(2)吞吐高效开发提供理论指导。The oil exchange rate of CO_(2) huff and puff decreases with the increase of CO_(2) huff and puff cycle.In order to improve the rate,the numerical simulation method is used to optimize the injection-production parameters of CO_(2) huff and puff with variable injection time,and the economic evaluation is carried out.The results show that the cumulative oil production of the cyclic gas injection scheme is 32983.4 m^(3),and the oil change rate reach to 1.11,which is higher than the optimal scheme of orthogonal experiment.The economic evaluation results show that the CO_(2) huff and puff scheme with variable cycle gas injection has the best economic benefits,with a net present value of 345.07×10^(4) yuan and an internal rate of return of 18.06%.The research results can provide theoretical guidance for the efficient development of CO_(2) huff and puff in tight reservoirs.

关 键 词：致密油藏 CO_(2)吞吐 周期注气量 正交实验 经济评价 

分 类 号：TE348[石油与天然气工程—油气田开发工程]