多分支水平井是煤层气高效开发方式之一,具有较高的产能潜力,为了分支井技术能够得到合理的应用,为此对煤层气多分支井技术发展及产能预测模型进行调研分析。在介绍煤层气分支井的基本原理和发展背景的基础上,分析了多分支井的优势及难点,并对煤层气分支井产能研究得到的结果进行了梳理。在调研综述和分析的基础上,分析了目前常用的几种分支井类型的形态参数对煤层气产能影响研究存在的不足,提出了分支井产能分析对指导分支井类型及轨道设计的展望,以期为提高煤层气分支井产能提供指导方向。Coalbed methane multilateral horizontal well is one of the efficient development methods of coalbed methane, which has high production capacity potential. In order to obtain a reasonable application of the bifurcated well technology, the development of the multi-branch well technology and the productivity prediction model are investigated and analyzed. On the introduction of the basic principle and the development background of CBM multilateral wells, the advantages and difficulties of multi-branch wells are analyzed, and the results of research on the productivity of coalbed methane branch wells are sorted out. On the basis of the research overview and the analysis, it puts forward the shortcomings of the research on the influence of morphology parameters on coalbed methane production capacity for several types of branch wells commonly used at present, and puts forward the outlook of the branch well production capacity analysis on guiding the design of branch wells, so as to point out the direction for the research on the production capacity of branch wells of coalbed methane.
