疏松砂岩稠油油藏水驱后期转蒸汽吞吐及其防砂措施研究

方法 利用蒸汽吞吐开采技术及配套的防砂措施，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笛油油藏采收率的有效途径。

Substitution of steam stimulation with water drive for unconsolidated sandstone heavy oil reservoir at later phase and its sand control.

Method Heavy oil reservoir in unconsolidated sandstone is developed after water drive, with the method of steam stimulation and complete of sand control. Purpose To find a way that recovery can be further improved from the heavy oil reservoirs of unconsolidated sandstone at later phase of water flooding development. Result Based on use of corresponding sand control, the used part of the reservoirs is improved after injection of HPHT steam into the reservoirs because of considerably increased mobility of the crude oil in the formations due to the decreased viscosity, and the decreased water content of the produced fluid from the wells and increased oil content. Conclusion Steam stimulation production combining with corresponding sand controlling is the effective way of improving the recovery from unconsolidated sandstone heavy oil reservoirs.