挥发性油藏CO_2混相驱数值模拟研究
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摘要
X_(52)油藏在目前开发过程中存在地层压力低,地层亏空严重,产量下降快,递减幅度大,天然能量开发已进入中高含水期,水淹严重,大量剩余油以残余油形式滞留与地层中,继续靠边水驱替或人工注水驱很难改善开发效果等一系列问题。为了进一步提高开发效果,进行了CO_2混相驱数值模拟研究,优化了注采井网井距、注采方式、注入速度、注采比、注入方式等注采参数,预测了最佳开采方案。数值模拟研究表明,选择在油藏构造高部位采用水气交替方式注入CO_2,能在构造环部形成新的油气富集带,机理清楚,工艺相对简单,开发效果好,是一种值得推广的高水淹挥发性油藏三次采油方式。
X_(52) reservoir has a series of problems in the current development process, such as low formation pressure, serious formation energy deficit, rapid production decline, serious water flooding, and so on. In order to further improve the development effect, numerical simulation of CO_2 miscible flooding was carried out. The injection-production parameters such as well spacing,injection-production mode, injection speed, injection-production ratio and injection mode were optimized, and the optimal production plan was predicted. The results of numerical simulation showed that injecting CO_2 alternately in the high part of reservoir structure can form a new oil and gas enrichment zone in the structural ring. The mechanism is clear, the process is relatively simple and the development effect is good. So it as a tertiary oil recovery method is worth popularizing for high water flooding volatile reservoirs.
X_(52) reservoir has a series of problems in the current development process, such as low formation pressure, serious formation energy deficit, rapid production decline, serious water flooding, and so on. In order to further improve the development effect, numerical simulation of CO_2 miscible flooding was carried out. The injection-production parameters such as well spacing,injection-production mode, injection speed, injection-production ratio and injection mode were optimized, and the optimal production plan was predicted. The results of numerical simulation showed that injecting CO_2 alternately in the high part of reservoir structure can form a new oil and gas enrichment zone in the structural ring. The mechanism is clear, the process is relatively simple and the development effect is good. So it as a tertiary oil recovery method is worth popularizing for high water flooding volatile reservoirs.
引文
[1]郭庆安.松南气田CO2驱油试验研究[J].石油天然气学报,2010,32(4):130-132.
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[3]吴忠宝,甘俊奇,曾倩.低渗透油藏二氧化碳混相驱油机理数值模拟[J].油气地质与采收率,2012,19(3):67-70.
[4]熊健,郭平.CO2非混相驱注气参数优化研究[J].新疆石油科技,2012,22(3):22-24.
[5]胡军.王78-2井区CO2混相驱数值模拟研究[J].中国石油和化工标准与质量,2016,36(20):65-66.
[2]刘学利,郭平,靳佩,等.塔河油田碳酸盐岩缝洞型油藏注CO2可行性研究[J].钻采工艺,2011,34(4):41-44.
[3]吴忠宝,甘俊奇,曾倩.低渗透油藏二氧化碳混相驱油机理数值模拟[J].油气地质与采收率,2012,19(3):67-70.
[4]熊健,郭平.CO2非混相驱注气参数优化研究[J].新疆石油科技,2012,22(3):22-24.
[5]胡军.王78-2井区CO2混相驱数值模拟研究[J].中国石油和化工标准与质量,2016,36(20):65-66.