Method for inverting stratum parameters by array induction logging data and device thereof

Abstract

The invention discloses a method for inverting stratum parameters by array induction logging data, which comprises the following steps of: obtaining array induction logging data and auxiliary logging curve data; layering a measured well section according to the array induction logging data and the auxiliary logging curve data, preliminarily inverting an array induction logging curve by a geometric factor method, and generating the initial original state stratum resistivity, the invaded zone resistivity and the invaded radius value of a corresponding layer; generating an array induction simulation response curve according to the initial original state stratum resistivity, the initial invaded zone resistivity and the initial invaded radius value of the corresponding layer; and judging whether the array induction simulation response curve is accordant with an array induction original response curve or not, if not, modifying the initial original state stratum resistivity, the invaded zone resistivity and the invaded radius value through the interactive inversion in combination with the geological characteristics of the corresponding layer according to the array induction original response curve, and outputting the final original state stratum resistivity, the final invaded zone resistivity and the final invaded radius value.

Description

technical field [0001] The invention relates to the field of petroleum logging, in particular to a method and device for inversion of formation parameters using array induction logging data, specifically a method and device for the original response and synthetic A method and device for inversion of geophysical parameters by combining focused logging curves and other logging information. Background technique [0002] In the reservoir section, due to the influence of mud invasion, wellbore, surrounding rock, etc., the measured array induction resistivity deviates from the real resistivity, which reduces the ability to identify oil and water layers through the resistivity curve, and the calculated oil saturation The degree of error is large. Therefore, it is necessary to use the inversion method to restore the real formation surface. [0003] However, the traditional inversion methods have been difficult to be practical because they are all purely mathematical methods, as lo...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional inversion methods have been difficult to be practical because they are all purely mathematical methods, as long as the error between the simulated logging curve and the measured curve is less than a given ε, regardless of the rock physics, geology Whether the environmental and engineering conditions are reasonable, therefore, the results obtained by using traditional inversion methods are not reasonable enough

Images