煤炭工程 ›› 2015, Vol. 47 ›› Issue (12): 93-96.doi: 10.11799/ce201512029

• 研究探讨 • 上一篇    下一篇

临汾地区煤层气井产层组合方式对产能的影响研究

吴双   

  1. 中国地质大学(北京)能源学院
  • 收稿日期:2015-01-29 修回日期:2015-03-27 出版日期:2015-12-11 发布日期:2015-12-29
  • 通讯作者: 吴双 E-mail:1032137410@qq.com

Effects of the combination of producing layers on the coalbed methane well productivity in Linfin block

  • Received:2015-01-29 Revised:2015-03-27 Online:2015-12-11 Published:2015-12-29

摘要: 分析了临汾地区5#、8#、9#煤层在不同组合方式下的气井排采效果,得出了合采5#+8#或5#+9#煤层组合的气井产能优于单采5#煤层及合采5#+8#+9#或5#+砂岩层+9#煤层组合的气井产能,并依据现场测试数据及理论计算,深入研究了产层间地质条件差异对煤层气井产气效果的影响,结果表明:层间水文地质条件、压力系统及渗透性、含气性及胶结程度、总资源量的差异是引起煤层气井产能好坏的主要原因。

关键词: 临汾地区, 产层组合方式, 产能, 单采, 合采, 层间差异

Abstract: The analysis is made about the drainage performance of gas wells under different combination of coal seams (5#、8#、9#) in Linfin block. It illustrates that the productivity under multi-layer production of 5#+8# or 5#+9# is better than that under single-layer production of 5# and multi-layer production of 5#+8#+9# or 5#+sandstone+9#. Based on the test data and theoretical calculation, the effects of interlayer geological condition differences on CBM well productivity are studied intensively. The result shows: the chief reasons affecting the productivity can be explained as the interlayer differences of hydrogeological conditions, pressure and permeability, gas content and cementation, and total resource.

Key words: Linfin block, combination of producing layers, productivity, single-layer production, multi-layer production, interlayer differences

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