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随着油气田开发进入中后期,油井综合含水率上升,油田开发难度加大,为进一步提高采收率,需要对油藏流体相态进行深入研究。文中对克拉玛依油田五2西克下组T2K1块油藏流体进行了相态特征测试,通过单次脱气实验、PV关系实验、多次脱气实验等相态实验研究,获得了其相态特征。研究结果表明,该流体具有密度低、粘度低、膨胀性和收缩性小等特点;原油具有一定的溶解气量,属中等气油比原油;体积系数偏小,气体平均溶解系数一般;原油体积系数分布较集中,值较小。
With the development of oil and gas fields entering the middle and later stages, the comprehensive water cut of the oil wells will increase and the oilfield development will be more difficult. In order to further enhance the oil recovery, the fluid phase of the reservoir needs to be further studied. In this paper, the phase behavior of the T2K1 reservoir in the Lower Wuchang-2kek Formation in the Karamay Oilfield has been tested. The phase behavior of the reservoir has been obtained through single phase degassing experiment, PV relationship experiment and multiple degassing experiments. . The results show that the fluid has the characteristics of low density, low viscosity, low expansibility and shrinkage. The crude oil has a certain dissolved gas content, which is a medium gas oil ratio crude oil. The volume factor is small, the average gas solubility coefficient is generally. The crude oil volumetric coefficient Distribution is more concentrated, the value is smaller.