Nuclear magnetic resonance echo data inversion method based on two-parameter regularization and nuclear magnetic resonance echo data inversion device thereof

Abstract

The invention provides a nuclear magnetic resonance echo data inversion method based on two-parameter regularization and a nuclear magnetic resonance echo data inversion device thereof. The nuclear magnetic resonance echo data inversion method comprises the steps that nuclear magnetic resonance echo data are acquired; an inversion method target function is constructed according to a target function corresponding to a Tikhonov method and a target function corresponding to a maximum entropy method; the optimal regularization parameters of the inversion method target function are acquired according to the optimal regularization parameters of the target function corresponding to the Tikhonov method and the optimal regularization parameters of the target function corresponding to the maximum entropy method; and the nuclear magnetic resonance echo data and the optimal regularization parameters of the inversion method target function are substituted in the inversion method target function for solution so that the inversion result of the nuclear magnetic resonance echo data is obtained. According to the nuclear magnetic resonance echo data inversion method based on two-parameter regularization and the nuclear magnetic resonance echo data inversion device thereof, the high-precision inversion result of the nuclear magnetic resonance echo data can be obtained.

Description

technical field [0001] The invention relates to the technical field of well logging data processing in oil and gas exploration, in particular to a method and device for inversion of nuclear magnetic resonance echo data based on double-parameter regularization. Background technique [0002] The original echo string data collected by nuclear magnetic resonance logging needs to be inverted to obtain the nuclear magnetic resonance spectrum in order to further evaluate formation porosity, permeability, fluid type, fluid saturation, pore size distribution, formation wettability, and crude oil viscosity. Layer parameters, the accuracy of the inverted NMR spectrum is directly related to the quality of the NMR logging interpretation results. Therefore, it is of great significance to study a stable and high-precision NMR echo data inversion method. [0003] The existing NMR echo data inversion methods can be divided into two categories: linear inversion and nonlinear inversion. The ...

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Problems solved by technology

[0004] The present invention provides an NMR echo data inversion method and device based on double-parameter regularization to overcome the NMR echo data inversion method in the prior art that cannot take into account the smoothness and sparsity of the solution. Technical Problems of Low Accuracy of Wave Data Inversion

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