套管造穴在柳林石西区块U型对接井施工中的应用

Application of Casing Hole Making in Construction of U-shaped Butt Joint Well in Shixi Block of Liulin

柳林石西区块是一个勘探程度较低的煤层气新区块,投运的煤层气井产水量较大,产气周期长。为了缩短排水降压的周期,尽快产气,也为了提升单井产气量,利用已完钻的垂直勘探井对煤层段进行开窗扩孔,施工U型对接井。探讨了套管造穴在柳林石西区块U型对接井施工中的应用,并进行了效果评价,指出了施工注意事项。

Shixi Block of Liulin is a new CBM block with low exploration degree.The CBM wells put into operation have large water production and long gas production cycle.In order to shorten the period of drainage and depressurization and produce gas as soon as possible,and to improve the gas production of single well,the completed vertical exploration wells are used to open windows and expand holes in the coal seam section and construct U-shaped butt wells.This paper discussed the application of casing hole making in the construction of U-shaped butt well in Shixi Block of Liulin,evaluated the effect,and pointed out the matters needing attention in construction.