利用地层体积压缩系数评价气层的方法研究

对气层的评价特别是套管井的气层评价,常采用常规测井分析程序,即利用电阻率和孔隙度测井按骨架、孔隙流体以及泥质等电阻率并联模型,按照各种计算含水饱和度公式计算得出地层的含水饱和度,确定地层的流体性质,对地层作出评价。常规测井程序无法利用现有的资料得出准确的结果。采用压缩系数模型对矿物成分和具有不同压缩性的孔隙流体以及声波等测井资料进行研究,编制了针对气层测井分析程序(CFI)。应用CFI程序结果表明,在现有常规资料条件下,该程序可以准确识别储层中的气体。

Application of Formation Volume Compression Coefficient to Assess Gas Reservoir Research Methods

Adopted usually is the conventional logging analysis program to assess the gas reservoir,especially to assess the gas reservoir of casing well,that is,utilized are resistivity and porosity to establish a parallel model according to resistivity of skeleton,pore fluid and mud mass,calculated is the water saturation of the strata by using various calculation formulas so as to determine fluid properties of the strata and assess the gas reservoir.However,such logging analysis program is unable to utilize the existing information to obtain a correct conclusion.Adopted is the compression coefficient model to study such logging data as mineral compositions,pore fluids with different compressibility and sound waves and developed is an analysis program(CFI) for gas reservoir logging.Application results of the program show that it is able to utilize the existing conventional information to identify gases in gas reservoir exactly and good effects have been obtained by its application in Dagang Oilfield.