裂缝性高饱和压力油藏产能计算新方法

A new productivity calculation method for fractured reservoirs with high saturation pressure

朱婵 沈开元 童玉宝 江武 钱乔雅 李文苗

Zhu Chan Shen Kaiyuan Tong Yubao Jiang Wu Qian Qiaoya Li Wenmiao

针对裂缝性碳酸盐岩高饱和压力油藏应力敏感性强、不适用常规产能预测方法的问题,从流动系数随压力的变化关系研究入手,以达西定理为基础,结合油田实际,提出了高应力敏感、高饱和压力油藏产能预测方法。用盐下油田3口井实测的向井流动态关系曲线进行对比的结果表明,经产能预测方法获得的计算值与实际测试值吻合得非常好,平均误差为4.1%。对于当井底流压低于某值,产量将随之降低,并且采用常规产能预测方法难以预测的难题,该新方法为此提供了科学的解决办法,对裂缝性高饱和压力油藏开发具有指导意义。

As fractured carbonate reservoirs with high saturation pressure are strongly sensitive to stress,the conventional productivity prediction methods are not applicable.Beginning with the study on the variation of flow coefficient with pressure,this paper presents a new productivity prediction method for reservoirs with high stress sensitivity and high saturation pressure based on the theory of darcy flow and in combination with the production practices.Comparison with the mea-sured inflow performance relationship (IPR) curves from three wells shows that the calculated and measured values are in good agreement with an average error of only 4.1%.When bottom hole flowing pressure is lower than a given value output may decrease correspondingly,causing difficulty in productivity prediction with conventional method.The new method can be used to solve this problem,thus is of great significance for the development of the fractured reservoir with high saturation pressure.

10.11743/ogg20130219