王庄油田郑411块特超稠油开采机理与评价方法

粘度大于10×10~4mPa·s的特超稠油,在热采标准中目前是无法开采的,然而,王庄油田郑411块脱气原油粘度在74×10~4mPa·s以上,通过打水平井并采用注CO_2辅助于蒸汽吞吐开采方式,对这类稠油却实现了有效的开发。重点介绍了这种开采方式的CO_2驱油机理和蒸汽吞吐机理,提出了经营率的开采评价方法,评价结果表明,王庄油田郑411块特超稠油开发效益很好。

Mechanism and evaluation method of extremely heavy oil production in Z411 block, Wangzhuang oilfield

In the standard of thermal production,there is no way to exploit the extremely heavy oil with the viscosity more than 10×10~4 mPa?s.Through the horizontal well and the steam soak assistant by the injection of CO_2,the heavy oil in Z411 block of Wangzhuang oil field is effectively produced while the viscosity of degassed oil is over 74×10~4 mPa?s. the mechanism of oil displacement by CO_2 and the steam soak are introduced and the production evaluation method is presented.The evaluation results show that the method is suitable to the production at the area.