细管实验法测定CO_(2)驱最小混相压力

Determination of minimum miscibility pressure for CO_(2)flooding using the thin tube experiment method

CO_(2)驱是一种针对低渗透油藏物性差、非均质性强、采收率低等问题的更高效和更具潜力的提高采收率方法。本文使用细管实验对延长油田白湾子区块和樊学区块CO_(2)驱最小混相压力(MMP)进行测定。实验得到白湾子区块的原油MMP为21.30 MPa,樊学区块的原油MMP为16.60 MPa。实验结果可为目标区域注CO_(2)驱提高采收率及降低操作成本提供科学理论依据。

CO_(2)flooding is a more efficient and promising method for improving oil recovery in low permeability reservoirs,which addresses issues such as poor physical properties,strong heterogeneity and low oil recovery.This article uses a thin tube experiment to determine the minimum miscibility pressure(MMP)of CO_(2)flooding in the Baiwanzi and Fanxue blocks of Yanchang oilfield.The experimental results showed that the MMP of crude oil in the Baiwanzi block was 21.30 MPa,and the MMP of crude oil in the Fanxue block was 16.60 MPa.The experimental results can provide a scientific theoretical basis for improving oil recovery and reducing operating costs by injecting CO_(2)into the target area.