高246块二氧化碳非混相驱可行性分析及数值模拟  

Feasibility analysis of CO_2 immiscible displacement and numerical simulation for block Gao246

作　　者：杨光璐[1] 

机构地区：[1]中国石油辽河油田公司勘探开发研究院,辽宁盘锦124010

出　　处：《油气地质与采收率》2008年第6期56-58,共3页Petroleum Geology and Recovery Efficiency

摘　　要：高246块处于低产低效开发水平,继续蒸汽吞吐开发潜力不大,必须研究适合该块的产量接替方式。应用数值模拟方法和油藏工程方法,进行了高246块二氧化碳非混相驱可行性论证。选取该块典型井组高2-4-72侧作为研究对象,建立了油、水、气三相三组分数值模拟模型,在井组历史拟合基础上对开发方式、注采参数和开发指标进行了研究。结果表明,高246块适合二氧化碳非混相驱开发,其开发过程中合理的注采参数包括二氧化碳段塞为0.02倍孔隙体积,气水比为3∶1,二氧化碳注入速度为2.71×10-5m3/(m3·d)(地下体积),注水速度为2.71×10-5m3/(m3·d)(地下体积),采注比为1∶1。二氧化碳非混相驱在该块具有较广阔的前景,可有规模地实施于12个井组,提高采收率13%左右。The block Gao246 is in low production and low benefit level. Cyclic steam stimulation is not applicable in this block. It is urgent to find an alternative method of increasing oil recovery. CO2immiscible displacement is proposed as a replacement EOR method. Using the method of numerical simulation and reservoir engineering,feasibility analysis of CO2 immiscible displacement was carried out in block Gao246. Well pattern Gao2-4-72C in the block was selected and simulated. A three phase and three component model was established. On the basis of history matching,the development scheme,injection-production parameters and development indexes were researched. The results show that block Gao246 is suitable for CO2 immiscible displacement,a series of rational injection-production parameters were determined:CO2 plug is 0.02PV,gas -water ratio is 3:1,injected speeds of CO2 and water are 2. 71 × 105m3/(m3.d) (underground volume). Injection-production ratio is 1:1. CO2 immiscible displacement has broad prospect with 12 planning pilot patterns in this block. The recovery factor can be improved by 13% during the CO2 immiscible displacement.

关 键 词：二氧化碳驱 数值模拟 油藏工程 非混相驱替 注采参数 采收率 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]