鄂尔多斯盆地深部咸水层CO_(2)驱水与埋存潜力评价方法研究  

Study on potential evaluation method on CO_(2) EWR and storage for deep saline layers in Ordos Basin

作　　者：王锐[1] 李阳[2] 吕成远[1] 唐永强 崔茂蕾[1] 贾会冲[3] 刘玄[1] 刘建党 WANG Rui;LI Yang;LYU Chengyuan;TANG Yongqiang;CUI Maolei;JIA Huichong;LIU Xuan;LIU Jiandang(SINOPEC E&P Research Institute,Beijing 100083,China;SINOPEC Group,Beijing 100728,China;Huabei Branch Company,SINOPEC,Zhengzhou 450006,China)

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [2]中国石油化工集团公司,北京100728 [3]中国石化华北油气分公司勘探开发研究院,郑州450006

出　　处：《非常规油气》2021年第5期50-55,69,共7页Unconventional Oil & Gas

基　　金：国家重大专项“鄂尔多斯盆地低渗致密油藏注气提高采收率技术”(2016ZX05048003)。

摘　　要：该研究以鄂尔多斯盆地致密咸水层为研究对象,建立了深部咸水层CO_(2)驱水过程中有效埋存量评价方法。基于室内实验和数值模拟方法,确立了CO_(2)在地层水中溶解度、CO_(2)注入后的综合压缩系数、CO_(2)驱水采收率3种埋存系数。以鄂尔多斯盆地石千峰组深部咸水层为例,分析并评价了目标储层深部咸水层CO_(2)驱水与埋存的综合潜力。研究结果表明,深部咸水层CO_(2)驱水与埋存过程中有效埋存量与CO_(2)在水中溶解埋存、CO_(2)注入后储层综合压缩埋存、CO_(2)驱水替换作用导致的埋存有关;CO_(2)在咸水中的溶解度随着温度的增加而降低,随着压力的升高而增大;CO_(2)注入后的地层综合压缩系数与岩石压缩系数及油气水饱和度相关;致密储层条件下CO_(2)驱采收率较低,仅为9.65%;目标储层深部咸水层CO_(2)驱水与埋存过程中溶解作用埋存量最大,其次为驱替作用埋存量,再次为压缩效应埋存量。The evaluation method on CO_(2) effective storage capacity was established for the Shiqianfeng layer in Ordos basin. The effective storage factors of the CO_(2) solubility in brine, the comprehensive compressibility factor and the recovery factor of CO_(2) flooding were determined through experiments and numerical simulation. Furthermore, the potential of CO_(2) storage on CO_(2) EWR and storage was assessed through above methodology. The results show that the solubility of CO_(2) in brine decreases with temperature and increase in pressure. The comprehensive compressibility factor is closely related with fluid saturation values and the compressibility factors of rock and fluid. And the simulation data indicates that the recovery factor of CO_(2) flooding in tight saline formation is only 9.65%. Finally, the comprehensive potential evaluation indicates that the dissolution effect contributes the highest CO_(2) sequestration, and the replacement effect takes the second, and the compressibility effect is the lowest.

关 键 词：深部咸水层 CO_(2)驱水与埋存 溶解作用 压缩效应 替换效应 埋存潜力 

分 类 号：TE34[石油与天然气工程—油气田开发工程]