摘要
水平井与地层接触面积大,在排量相同时,比直井的产量高出许多倍。也因与地层的接触面积大,引起了比直井更大的地层伤害。本文将提出判断对产量有贡献的水平井段长度有发展的新技术,并给出机械表皮因子的计算新方法。有表皮因子长度为x_(f1)水平井的效果,可以由没有表皮因子的其长度为x_(f2)的水平井来代替。对于有表皮伤害的水平井来说,x_(f1)>x_(f2),而对于一口进行过增产措施的水平井,x_(f1)<x_(f2)。
A horizontal well,due to its large contact with the formation may be several times more productive than a vertical well draining the same volume.However,this large contact of a horizontal well with the formation will cause a more severe formation damage than the one obstained from a vertical well.This paper presents the development of a new technique for determining the horizontal well length contributing to production,and the corresponding caculation of the correct mechanical skin damage caused by the horizontal drilling operations. The response of a horizontal well with mechanical skin and of length x_(f2) can be substituted by a horizontal well of length xf1 with no mechanical skin.For a horizontal well with mechnical skin damage,x_(f1) is smaller than x_(f2) while for a stimulated horizontal well x_(f2) is greater tham x_(f1).
关键词
水平井
表皮因子
计算
钻井
Horizontal well
Skin Factor
Calculating
