多靶点长距离水平对接连通井施工工艺

Multi-target and Long Distance Horizontal Intersected Wells Construction Technology

摘要:

H050井是土耳其Beypazari天然碱矿四期工程施工的一口水平井，按照原有施工设计，H050井需要与另外一口垂直井V050对接连通，形成一个溶采单元。由于此井组处于矿区边缘，为了保证溶采通道落在主矿层里，对施工设计进行修改，在H050井和V050井之间增设3个靶井。然而中间3个靶井的设计井位处于悬崖边和老井边，因此将设计井位挪至便于施工的位置，施工时采用定向钻进，使靶井的井底靶区回到指定区域，最终，H050成功连通4个靶井，并实现长距离水平钻进。本文结合施工实践，总结了几点多靶井连通施工的技术关键，为类似钻井施工提供借鉴和参考。

Abstract:

H050 is one of the horizontal wells in the phase IV of Turkey Beypazari trona solution mining project, which should be connected to another vertical well V050 to form a solution mining unit according to the original construction design. For this well unit is placed at the edge of the mining area, the original construction design is modified by setting additional 3 controlling target wells between H050 and V050 to ensure the leaching passage in the trona layer. The designed locations of these 3 wells are at edge of cliff or near the old production well, 2 wells were moved several meters away for convenient construction. By directional drilling, the bottom target area of one borehole went back to the required location. Finally, H050 is connected with 4 target wells to realize long horizontal drilling. Combined with the construction practice, this paper summarizes some crucial construction techniques of multi-target wells intersection to provide reference to similar drilling construction.