Author(s): LONG Dong, LIN Xiu-kuo, WANG Sheng, HU Han-yue, LIU Zhi-qiang, YUE Gang, The Institute of Exploration Techniques, CAGS, Northeast Coalfield Geological Bureau No.103 Exploration Team, Northeast Coalfield Geological Bureau No.155 Exploration Team
Pages: 56-60
Year: 2016 Issue:  9
Journal: Exploration Engineering(Drilling & Tunneling)
Keyword:  multi-target; long distance; horizontal intersected wells; accurate intersection; directional drilling;
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 3controlling 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.