Factors affecting the production of coalbed methane well after fracturing: a case study of Hangcheng block
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摘要: 影响煤层气井压后产量的因素众多而复杂,主要包括客观地质条件、压裂施工和排采等因素。通过对韩城区块2009-2010年大量施工数据的统计、处理和分析归纳,探讨了影响煤层气井压后产量的压裂施工因素。结果显示:停泵压力、入井液量和入井加砂量等参数与A#、B#、C#各煤层压裂效果呈正比关系;煤层的压降倾角与A#、C#煤层压裂效果呈反比关系。据此研究结果,通过调整和优化施工参数,可使压裂后的煤层气井获得理想的产量效果。Abstract: The factors affecting the production of coalbed methane well after fracturing are numerous and complex. It mainly includes geological conditions, fracturing factors, drainage and other aspects. This paper mainly discussed the fracturing factors which affect the production after fracturing of coalbed methane well. Through statistics, processing, analysis and summarization of great amount of data in 2009 in Hancheng block, the results have been obtained, showing positive relationship between the pumping off pressure, actual fluid, sand into the well and the effects of coalbed fracturing for seam A#, B#, C#, the inversely proportional relationship between the pressure drop and the effects of coalbed fracturing for seam A#, C#. Therefore, by using the results of this study, the coal bed methane wells after fracturing could achieve the desired output results by adjusting and optimizing construction parameters.
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