中国应尽快实现低渗煤层气藏工业化生产

中国煤层气藏的特点是渗透率低，解吸速度低，产量低，产量递减快，工业化生产难，必须改变管道市场销售观念，特别是在改变常规天然气长井距散采方式，而是采用压缩天然气（ＣＮＧ）、吸附天然气（ＡＮＧ）技术，开拓零星分散而广阔的煤层气销售市场，采用裸眼洞穴应力释放完井法、释放应力，提高渗透率，提高排水速度，提高解吸速度；采用超井距多井多层群井集采；排水排沙同时集排。中国低渗煤层气藏工业化生产指日可待。

INDUSTRIAL SCALE PRODUCTION OF LOW PERMEABILITY COAL BED GAS RESERVOIRS IN CHINA MUST BE REALIZED AS SOON AS POSSIBLE

The coal bed gas reservoirs in China are characterized by low permeability,low desorption speed,low production,rapid production decline and difficult to realize industrial scale production. The marketing concept by pipeline delivery must be changed, especially the scattered production method by wide spaced wells used for producing convertional natural gas must be changed .The industrial scale production of the coal bed gas in China can be expected soon through adopting CNG and scattered coal bed gas market, the cavern stress releasing open hole completion method to release the stress, improve the permeability, raise the drainage speed and desorption speed, the dense well spacing to realize multi well and multi zone production and the simultaneous water and sand withdrawal.