Well logging curve correction method and device

Abstract

An embodiment of the invention provides a well logging curve correction method and device. The method includes: acquiring straight well section depth values and well logging values of multiple collection points of a straight well section according to formation interface information at a locus of a horizontal well section, horizontal well section information and straight well section information, and acquiring horizontal well section depth values, well logging values and well drift angles at positions, corresponding to the collection points on the straight well section, of the horizontal well section according to the straight well section depth values; acquiring a correction function fitting relation through cross-plot fitting according to the well logging values and the well drift angles of the horizontal well section and the well logging values of the straight well section; correcting a well logging curve of the horizontal well section according to the correction function fitting relation. The formation interface information at the locus of the horizontal well section is fully utilized, so that the problem that existing well logging curve correction methods do not fully utilize transverse information of a horizontal well and are low in correction accuracy is solved, accuracy and reliability of correction are improved, and simple, quick, practical and effective correction of the well logging curve is realized.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a logging curve correction method and device. Background technique [0002] Horizontal well is an important technology for developing oil and gas fields and improving recovery. It has good application effects in the fields of new oilfield development, remaining oil potential adjustment in old oilfields, gas reservoir and condensate gas reservoir development, and water injection. Therefore, the horizontal well section logging curves related to the above horizontal wells are of great significance in reservoir evaluation. [0003] In order to obtain accurate logging curves of horizontal well sections, it is often necessary to further correct the obtained logging curves of horizontal well sections. During the specific implementation, the main correction methods used include: theoretical simulation of the response of logging tools such as induction and lateral, anisotr...

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Problems solved by technology

[0004] However, the above-mentioned correction methods generally do not make effective use of the formation interface information at the trajectory of the horizontal well section in practical applications, so that the accuracy of the correction results is not high, and the existing correction methods generally focus on theory. There is a big difference between the research on the field and the actual application, so the practicability is not strong

[0005] For the above problems, no effective solutions have been proposed so far

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