胶囊型泄油区的水平井产能

PRODUCTIVITY OF HORIZONTAL WELL IN CAPSULE-TYPE DRAINAGE AREA

在对Joshi水平井产能公式的椭圆型泄油区提出质疑的情况下，应用物理及数值方法分别重新模拟了水平井在地层中的渗流状况，提出新的水平井胶囊型泄油区的概念，最终利用等值渗流阻力原理推导了新的水平井产能公式，再结合现场水平井的生产数据对新公式与现有的水平井产能公式进行验证比较。新公式的计算结果与现场生产情况最为接近，明显优于其他水平井产能公式，因此认为所推公式可靠，具有可行性。应用新公式计算水平井产能较为合理，其结果符合度较高，具有较强的适用性，为油田预测水平井单井的产能提供了理论支持。

With questioning the Joshi horizontal well productivity equation for the elliptic drainage area, the seep- age flow status of horizontal wells in formation is simulated applying physical and numerical methods. This paper proposes a new concept for capsule-type drainage area in a horizontal well. A new productivity equation for horizontal wells is derived with the equivalent seepage flow resistance principle. The new equation is verified and compared to the existing one combining the production data from horizontal wells in the field. The result of the new equation is closest to the actual production status and is obviously better than other productivity equations for horizontal wells. So the derived equation is proved to be reliable and feasible. It is reasonable to calculate the productivity of horizontal wells with the new equation because of higher conformity and stronger applicability. The new productivity equation provides the theoretical support for the prediction of single horizontal well productivity.