A linear sliding theoretical parameter inversion method and device based on well logging data

Abstract

The embodiments of the invention provide a linear sliding theory parameter inversion method and a linear sliding theory parameter inversion device based on logging data. The method comprises the following steps: acquiring geological data and logging data, wherein the logging data includes an actual acoustic full wave train waveform; filtering the actual acoustic full wave train waveform to get an actual Stoneley wave waveform; building an objective function of error between the actual Stoneley wave waveform and a theoretical Stoneley wave waveform; and using the actual Stoneley wave waveform and the theoretical Stoneley wave waveform to acquire the linear sliding theory parameter under the condition that the objective function meets preset conditions according to a preset optimization method, wherein the theoretical Stoneley wave waveform is a waveform obtained after a theoretical acoustic full wave train waveform obtained according to the linear sliding theory parameter, a preset increment value, the logging data, the geological data and a preset model is filtered. According to the method, the linear sliding theory parameter is obtained through logging data inversion, and the difficulty in calculation of the theory parameter through rock physics experiments in the prior art is avoided effectively.

Description

technical field [0001] The invention relates to the technical field of geophysical inversion, in particular to a linear sliding theoretical parameter inversion method and device based on well logging data. Background technique [0002] When the formation medium contains fractures, its velocity and density will exhibit directionality, that is, anisotropy. There are three basic theories of anisotropy: Hudson theory, Thomson theory and linear sliding theory. Hudson's theory and Thomsen's theory have clear regulations on the fracture scale, and require that the fractures be evenly distributed within the seismic wavelength scale. Therefore, Hudson's theory and Thomsen's theory often correspond to the equivalent medium model in application. However, in actual formations, single or multiple groups of fractures of any size are often developed. For such cracks, the application of Hudson's theory and Thomsen's theory is limited. However, the linear sliding theory has no requiremen...

AI Technical Summary

Problems solved by technology

The traditional method to obtain the theoretical parameters of linear sliding is rock physics experiments. However, the disadvantages of rock physics experiments are that there are few core samples, high experiment costs, and it is difficult to simulate the real conditions of underground formations.

However, there is no method to obtain the theoretical parameters of linear sliding by using well logging data.

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