Petroleum Reservoir Evaluation and Development >
2020 , Vol. 10 >Issue 4: 87 - 92
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.04.013
Application of controllable shock wave plugging removal and permeability improvement technology in CBM gas field of Southern Yanchuan
Received date: 2020-03-20
Online published: 2020-08-07
In order to solve the problems such as coal blockage and low gas production of coalbed methane wells in the Southern Yanchuan block, an application test of controlled shock wave plugging removal and permeability improvement technology is carried out. Therefore, four typical wells are selected to analyze the geological and engineering parameters in the construction process, as well as comparative analysis of the gas and water production before and after the implementation. The results show that the application of controllable shock wave plugging removal and permeability improvement technology in coalbed methane wells can improve liquid fluidity, promote gas desorption and diffusion, and remove plugging in coal reservoirs. The well selection criteria of this technology are low coalbed fracture pressure, good fracturing effect, including dirt band, high gas-bearing capacity of coalbed, relatively high formation pressure coefficient, etc. This technology has the effect of creating fractures and removing plugs, which can improve the fluidity of formation fluids and remove formation pollution. It has a good implementation effect and application prospect in the near-well zone of south Yanchuan coalbed methane wells to plugging removal and increase gas production, and is expected to be a new stimulation technology for low yield and efficiency wells.
Zhe WANG . Application of controllable shock wave plugging removal and permeability improvement technology in CBM gas field of Southern Yanchuan[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(4) : 87 -92 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.04.013
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