摘要
针对目前大规模二氧化碳(CO_(2))驱油封存(CO_(2)-EOR)项目面临的封存场地适宜性评价方法主观、指标单一的问题,提出一种基于熵权TOPSIS法的适用于大规模CCUS驱油封存场地筛选的评价方法。选取岩石物理特性、油藏地质条件、原油化学组成等多个关键因素作为评价指标,通过加入熵权降低TOPSIS法主观性,对延长油田的157个开发区块驱油封存适宜性进行分级评价。结果显示:延长油田油气藏非混相驱适宜性分为3个适宜性等级,其中“高适宜”、“中适宜”封存区块占比达到87%,大部分区块位于油田西部、南部。封存潜力评估表明,46个“高适宜”区块理论封存量达到11.1×10^(8)t,占总理论封存量的56%,涉及地质储量15.2×10^(8)t。理论封存量最高的区块为河川区块,达到6800×10^(4)t,其次是志丹采油厂旦八区6048×10^(4)t。建议延长石油大规模CCUS项目优先选择适宜性评分大于0.85的14个区块,其理论封存量达到3.64×10^(8)t。研究结果可为油田开展大规模CCUS项目的封存区块优选提供方法参考。
A method based on entropy weight TOPSIS is proposed to evaluate the suitability of storage sites for large-scale carbon dioxide oil recovery and storage(CO_(2)-EOR)projects,which is usually evaluated with subjective and single-indicator method.This method is suitable for screening oil recovery and storage sites of large-scale CCUS project.Multiple key factors such as rock physical properties,reservoir geological conditions,and chemical composition of crude oil were selected as evaluation indicators.Through adding entropy weight to reduce the subjectivity of TOPSIS method,the suitability of oil recovery and storage in 157 development blocks of Yanchang Oilfield was graded and evaluated.The results showed that the immiscible oil displacement suitability of oil and gas reservoirs in Yanchang Oilfield was divided into three suitability levels,with“high suitability”and“medium suitability”sealing blocks accounting for 87%,and most of the blocks were located in the western and southern blocks.The assessment of CO_(2) storage potential showed that the theoretical storage capacity of 46“highly suitable”blocks reached 11.1×10^(8)t,accounting for 56%of the total theoretical storage capacity,involving geological reserves of 15.2×10^(8)t.The block with the highest theoretical storage capacity was the Hechuan block,reaching 6800×10^(4)t,followed by the Danba block of Zhidan Oil Production Plant with 6048×10^(4)t.It was recommended to prioritize the selection of 14 blocks with a suitability score greater than 0.85 and a theoretical storage capacity of 3.64×10^(8)t as the preferred storage blocks for the large-scale CCUS projects of Yanchang Oilfield.The research results can provide methodological references for the optimal selection of storage blocks for large-scale CCUS projects in oil fields.
作者
刘瑛
王宏
王苛宇
吴赟龙
王贺谊
沈振振
蔡博峰
庞凌云
曹丽斌
郭静
LIU Ying;WANG Hong;WANG Keyu;WU Yunlong;WANG Heyi;SHEN Zhenzhen;CAI Bofeng;PANG Lingyun;CAO Libin;GUO Jing(Research Institute of Yangchang Petroleum(Group)CO.LTD,Xi’an,China;International School of Economics and Management,Capital University of Economics and Business,Beijing 100070,China;Center for Carbon Neutrality,Chinese Academy of Environmental Planning,Beijing 100043,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2024年第10期2738-2745,共8页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(72140004)。
关键词
二氧化碳地质封存
油藏筛选
适宜性评价
封存潜力评估
CO_(2)geological storage
reservoir screening
suitability assessment
storage potential evaluation
