沁水盆地南部煤储层压裂缝几何特征预测

Predetermination of the Geometrical Characteristics of the Fracturing Slits in Southern Coal Reservoir of Qinshui Basin

以煤储层压裂改造基本理论为基础,对石油系统相关压裂参数的计算模型进行修正,建立起适合本地区储层的水力压裂计算模型;通过分析沁水盆地南部煤层气井压裂工艺、压裂工艺参数及煤储层力学特征,建立了裂缝几何尺寸计算的数学模型,并编制了相关计算程序;应用建立的数学模型,代入沁水盆地樊庄、郑庄区块压裂井的压裂施工参数,进行了压裂缝几何尺寸计算,结合压裂施工工艺与气、水产能进行了施工适用性评价,优化了压裂工艺参数。

Based on the principal theories of the coal reservoir＇s fracturing alteration,this paper revises the computational models for relevant fracturing parameters of petroleum system,and establishes the computational model of hydraulic fracture fitting in with for the coal reservoir in this area;and through the analysis on the fracturing technologies,fracturing parameters and mechanical characteristics of coal reservoir,establishes the mathematic models about the geometrical sizes of the slits,and puts forward corresponding calculation programs;and by using established mathematic models,substitutes the fracturing parameters of the fractured wells in Qinshui Basin＇s Fanzhuang and Zhengzhuang blocks,and makes the calculations of the slit＇s geometrical size,and ombining the construction technologies and gas-water yield,evaluates the construction＇s applicability,and optimizes the fracturing parameters.