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二氧化碳混相驱已经成为许多油田和学者研究的目标,实际数据表明混相驱比非混相驱能够获得更高的采收率,但不是所有油田区块都能全面实现混相驱,其中最小混相压力是形成混相驱关键因素之一.主要通过经验公式法对试验区原油与二氧化碳的最小混相压力进行预测,并通过现场实际测定的结果对各经验公式法预测的结果进行对比和分析,研究结果表明:The Petroleum Recovery Institutel关联式法(PRII)的预测结果误差最小,相对误差为1.09%,可作为试验区油田其他区块最小混相压力预测的经验公式.研究对与试验区具有相似特征区块最小混相压力的预测具有一定的指导意义.
Carbon dioxide miscible flooding has been the target of many oilfields and scholars. The actual data show that miscible flooding can achieve higher recovery rate than miscible flooding. However, not all oilfield blocks can achieve full hybrid flooding, in which the minimum miscibility pressure is formed One of the key factors of miscible flooding is the prediction of the minimum mixed pressure of crude oil and carbon dioxide in the pilot area by empirical formula method and the comparison of the results predicted by the empirical formula method through the field test results.The results show that The The prediction error of the Petroleum Recovery Institutel correlation method (PRII) is the smallest, with a relative error of 1.09%, which can be used as an empirical formula for predicting the minimum miscibility pressure in other blocks of the oilfield in the pilot area. The forecast has some guiding significance.