Method for transforming coal-bed gas well into coal-measure gas well
A technology for coalbed methane wells and coal measure gas, which is applied in wellbore/well components, chemical instruments and methods, and earth-moving drilling, etc., and can solve the problems of poor compatibility between fracturing fluid and formation, small fracturing fluid consumption, and high construction pressure. , to achieve the effect of increasing reservoir permeability, increasing daily gas production, and increasing stimulation volume
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[0025] Example 1
[0026] A method for transforming a coal-bed methane well into a coal-measure methane well includes the following steps:
[0027] 1) Choose a coal-bed methane well CM-01, which has undergone coal seam reformation in the early stage but has poor reformation effect, as the surface CBM well for this reformation. The well produced 1.19×10 in the drainage stage (9 months) after the first reformation 5 m 3 According to the gas content of each layer of the well, the volume method is used to calculate the control range of a single well (0.1 km 2 ) The coal-measure gas resources in the reformed section are 21.85×10 6 m 3 , The produced gas volume is less than one percent of the coal-measure gas resources in the reformed section, and according to the current domestic economic and technical conditions, when the resource abundance reaches 1×10 8 m 3 / km 2 The above has commercial value, so the well can be used as a reformed well.
[0028] 2) The reconstruction of Well CM-01 ...
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