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方法 利用蒸汽吞吐开采技术及配套防砂措施 ,开发水驱后的疏松砂岩稠油油藏。目的 探索疏松砂岩稠油油藏水驱开发后期进一步提高采收率的途径。结果 在采取相应防砂措施基础上 ,将高温高压蒸汽注入油层后 ,使原油粘度下降 ,原油在地层中的流动性大大增强 ,油井采出液中含水下降 ,油量上升 ,油层动用程度得到改善。结论 蒸汽吞吐开采与相应的防砂措施结合是提高疏松砂岩稠油油藏采收率的有效途径。
Methods Exploiting steam huff and puff extraction technology and supporting sand control measures, developing unconsolidated sandstone heavy oil reservoirs after water flooding. Objective To explore ways to further enhance oil recovery in the late stage of water flooding in unconsolidated sandstone heavy oil reservoirs. Results After the corresponding sand control measures were taken, high temperature and high pressure steam was injected into the oil layer to reduce the viscosity of the crude oil. The fluidity of the crude oil in the formation was greatly enhanced. The water content in the oil recovery fluid decreased and the oil content increased. Conclusion Combining steam stimulation with corresponding sand control measures is an effective way to improve oil recovery of unconsolidated sandstone heavy oil reservoirs.