经验公式法预测试验区最小混相压力适应性研究

The Adaptability Research of Experience Formula Method for Predicting The Minimum Miscible Pressure in Test Area

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 become the research target of many oilfields and scholars. The actual data shows that miscible flooding can get higher oil recovery efficiency than immiscible flooding. But not all oil blocks can fully realize the miscible flooding. The Minimum Miscible Pressure （MMP） is one of the key factors to form miscible flooding. This paper mainly predicts the Minimum Miscible Pressure of carbon dioxide and crude oil of test area through the empirical formula method, and makes the comparison and analysis between the actual measurement result and the empirical formula method results. The conclusion shows that the correlation method of The Petroleum Recovery InstituteI （PRII） has minimum error and the relative error is 1.09%, which can be used as the empirical formula to predict of the Minimum Miscible Pressure of other blocks in the oilfield. This research has certain guiding significance for predicting the Minimum Miscible Pressure of other oilfields with similar characteristics to the test area.