Causes of low-efficiency coalbed methane Wells and effect of treatment measures in Qinshui Basin
Qinshui Basin is the main battlefield of CBM development and production in China,but the overall development effect is not good,there are many low-efficiency Wells.This paper takes the typical block of Qinshui Basin as an example,carries out the analysis of low production and low efficiency well,and determines the reason of low production and low efficiency well.Combined with the stimulation tests carried out in recent years,the effect evaluation shows that the reservoir reconstruction measures have no problem for geological conditions,the low-efficiency Wells affected by late weight on bit and production discharge have better effects,and the other stimulation measures have poor effects.In the later stage,the treatment of low-efficiency coalbed methane Wells should change the way of thinking,carry out the adjustment of well area encryption,improve the utilization rate of reserves,and activate the low-efficiency well area as a whole.
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