垂直断层附近水平井产能的计算

Calculation of the horizontal well productivity near the vertical fault

有边水存在的垂直断层附近水平井产能的计算模型中,把油层的顶部、底部和断层作为封闭边界,把边水作为供给边界,利用镜像反映原理,把水平井在垂直平面上映射为三个无穷井排,再利用势函数的叠加原理得到平面上任意一点的势,从而得到水平井的产能。研究了断层距离、水平井长度和地层各向异性系数对水平井产能的影响,水平井离断层越近,产能越低,建议把水平井布置在断层和边水之间的中间位置。

In the calculating model of the horizontal well productivity near the vertical fault with the edge water, the top, bottom and faults of the oil reservoir are regarded as the closed boundaries, the edge water is considered as the supply boundary, using the mirror reflection principle, the imaging of the horizontal well in the vertical plane is mapped to three infinite well arrays, and then by means of the superposition principle of the potential function, the potential of any point on the plane is obtained, and furthermore the productivity of the horizontal well is achieved. The influences of the fault distance, horizontal well length and formation anisotropy coefficient on the horizontal well productivity were studied. The closer the horizontal well is to the fault, the lower the productivity will be, it is suggested that the horizontal well should be arranged in the middle position between the fault and the edge water.