Study On Optimization Of Fracturing Parameters Of Coalbed Methane Wells In Surrounding Basins Of Daqing Oilfield

The migration of coal bed methane can be summarized as three processes,desorption,diffusion and seepage,which are different from conventional oil and gas exploitation,no natural productivity without fracturing and pressure dropping.Although there are mature coal seam fracturing technology both at home and abroad,the technology is not suitable and no reference for Daqing exploration area.It must carry out the research on the optimization of the fracturing parameters if Daqing exploration area wants to achieve a breakthrough.This paper focuses on CBM well fracturing parameters optimization study of Daqing peripheral basins,briefly introducing the characteristics of coal formation、the difference between CBM and conventional oil and gas、domestic and foreign coal bed gas development and Daqing exploration area for coalbed methane exploration progress.Focusing on the fracturing parameter optimization method research,a detailed formation explanation and production technical bottlenecks of Daqing oilfield in the eastern part of the basin and the Hailaer basin will be done.The paper goes on mechanism research of coal bed methane production and explores sustainable development for coal production and gradually established a set of suitable practical coal bed methane well fracturing methods for the eastern part of the Basin The method mainly includes the evaluation of geological conditions、fracture network fracturing theory study、measuring layer and fracturing technology optimization、formula of fracturing fluid、support agent optimization and construction parameters simulation and pressure effect evaluation.According to the fracture parameters optimization methods,practical field tests are carried out in the eastern part of the basin and the Hailar Basin of Daqing.Based on geological conditions and reservoir characteristics of different blocks and combining production increasing mechanisms and methods,the field construction technologies、formula of fracture fluid and support agents are optimized.Through the crack monitoring and the 2470m~3 industrial air obtained by Jixi Basin X wells after fracturing,the effectiveness of the optimizing plans are confirmed and the coal formation can be reformed greatly.The good constructions results also justify the plan.