| Fishbone-type multi-branch horizontal wells cause widespread concern in the worldwide oil industry with its typically technical superiority, while the drilling technology of the fishbone-type multi-branch horizontal wells is a key link of wells drilling for the branch, to have a study on the drilling technology of fishbone-type multi-branch horizontal wells is important.Based on the surveys and studies'results in the technology and research on the branch well at home and abroad, combined with the situation of domestic oil fields that have been drilled about the fishbone-type multi-branch horizontal wells, using the methods of theoretical analysis and practical application, the drilling technology of the fishbone-type multi-branch horizontal wells is studied. Aiming at the drilling methods of the fishbone-type multi-branch horizontal wells, this paper focuses on the choices of drilling methods. Aiming at the sidetracking technology of the fishbone-type multi-branch horizontal wells, this paper focuses on the sidetracking point, the choices of sidetracking tools, and the processing technology of sidetracking window; aiming at the technology of the well path control of the fishbone-type multi-branch horizontal wells, this paper focuses on the methods of measurement and the optimization of the bottom hole assembly.The drilling technology of the branching horizontal-well is analyzed and summarized in this paper, the drilling methods and procedures of the branching horizontal-well are summarized. And according to process implementation of the tool, the drilling methods during the drilling process of the branching horizontal-well, the sidetracking technology and the technology of the well path control are optimized. The drilling technology is fit for the fishbone-type multi-branch horizontal wells.The drilling technology of the fishbone-type multi-branch horizontal wells has been successfully applied in Shenyang Oilfield in the Jing52-H1Z well, and the good drilling result has been made. |
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