火成岩天然气储层最优化测井数字处理方法

OPTIMIZATION DIGITAL PROCESSING LOGGING METHOD FOR IGNEOUS ROCK GAS RESERVOIR

火成岩天然气储层作为一类特殊的天然气勘探目标,已引起地质学家和测井分析家的重视,为此对最优化测井解释的原理作了详细的说明。通过求取实际测井响应和重新构建的理论测井响应值之间差异的极小值,从而得到地质参数的最优解,建立了火成岩天然气储层的测井解释模型,利用DFP和BFGS变尺度法来求解目标函数,用减小非相关函数Rinc来检验解释结果的质量,最后利用所编制的处理程序对大庆升平地区的一些探井测井资料进行处理,计算结果与岩心分析结果吻合较好。

The igneous rock gas reservoir,becoming a peculiar target for oil and gas exploration at present,has attracted great attention by many geologists and logging analysts all over the world.Therefore,the paper introduced the principle of the optimization logging interpretation.Then based on computing the minimum of the difference between actual and reconstructed theoretical logging response to obtain the optimum solutions of the geologic parameters,this paper built up a logging interpretation model for igneous rock gas reservoir,and applied DFP and BFGS variable scale method to compute the objective function,and verified the accuracy of the interpretation results by reducing the uncorrelated function Rinc.Finally,the paper applied the edited program with intellectual properties to process the logging data from the exploratory wells in Shengping area,and its computation results are well consistent with the core analysis results.