压裂水平井水电模拟实验边界修正方法

A boundary modification for water and electricity analogy experiment of fractured horizontal wells

利用水电模拟实验研究裂缝间距与产量的关系,若边界范围较小,则裂缝到边界的距离变化对产量的影响难以忽略,所得出的裂缝间距与产量的关系实际上是裂缝间距与裂缝到边界距离共同作用的结果。为了克服这种缺陷,提出了一种新方法,通过实验测量与公式校正,将边界距离和裂缝间距对产量的影响抽提出来,消除裂缝到边界距离对裂缝产量的影响。该方法反映了真实的裂缝间距与产量的关系,可以为压裂设计提供有效指导。

When we studied the relation between the fracture spacing and production rate by water and electricity analogy experi-ments, if the boundary range was small, the influence of the distance between the fracture and the boundary on the production would be difficult to be neglected. Actually, this relation was affected by both the fracture spacing and the distance between frac-tures and boundary. In order to overcome this shortcoming, we proposed a new method to extract this influence by experimental measurement and formula correction, then, to eliminate the influences of fracture and boundary distance on fracture production rate. This method reflected the real relation between the fracture spacing and the production rate, and provided effective guidance for fracturing designs.