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    • 7. 发明授权
    • Method for simultaneous inversion processing of well log data using a
plurality of earth models
    • 使用多个地球模型同步反演处理测井数据的方法
    • US5878372A
    • 1999-03-02
    • US811523
    • 1997-03-04
    • Leonty A. TabarovskyMichael B. Rabinovich
    • Leonty A. TabarovskyMichael B. Rabinovich
    • G06F17/12G06F19/00
    • G06F17/12
    • A method of determining a plurality of formation models each of which will simulate the response of a well logging instrument. A measured response of the well logging instrument is used to generate an initial model using inversion processing. A response of the instrument to the initial model is synthesized. A singular value decomposition is performed on the synthetic response to generate eigenparameters of the initial model. Eigenparameters having the least significant overall contribution to the synthetic response are sequentially substituted with linear equations representing prior constraints on the initial earth model. A linear system, including the remaining ones of the eigenparameters and the linear equations is solved so that the eigenparameters are preserved exactly and the linear equations satisfy a least squares fit. An additional synthetic instrument response is generated for each solution to the linear system which falls below a predetermined error threshold. The additional instrument responses are compared with the synthesized response to the initial model. The one of the solutions to the linear system which represents an earth model providing minimum misfit with respect to equations representing the prior constraints is selected as the best fit model.
    • 一种确定多个地层模型的方法,每个地层模型都将模拟测井仪器的响应。 使用测井仪器的测量响应来生成使用反演处理的初始模型。 合成仪器对初始模型的响应。 对合成响应执行奇异值分解以产生初始模型的特征参数。 具有对合成响应的最小有效总体贡献的特征参数被顺序地替换为表示在初始地球模型上的先前约束的线性方程式。 解决包括本征参数和线性方程中的其余线性系统的线性系统,使得本征参数被精确地保留,并且线性方程式满足最小二乘拟合。 对于低于预定误差阈值的线性系统的每个解决方案产生另外的合成仪器响应。 将额外的仪器响应与对初始模型的合成响应进行比较。 线性系统的解决方案之一是代表提供关于代表先前约束的方程的最小失配的地球模型,被选为最佳拟合模型。