Sound wave curve correction method for seismic processing

Abstract

The invention discloses a sound wave curve correction method for seismic processing, and relates to the technical field of geophysical exploration and development, which comprises the following steps:acquiring and calculating a logging curve; carrying out well-to-seismic comparison to determine the number of well logging curve decomposition stages, and completing well logging curve decomposition;analyzing statistical characteristics of the multi-well decomposition curve, selecting the decomposition curve to determine standardized parameters, and performing standardized correction on the logging curve; establishing a suitable rock physical model, calculating a rock physical model line, and calculating a sound wave curve based on the rock physical model; determining a sound wave curve abnormal layer section; and obtaining GR, RD and DEPTH of a normal interval of the sound wave value and a rock physical model to calculate a sound wave curve, establishing a sound wave curve correction model, and completing correction of the sound wave curve for an abnormal interval of the sound wave. By applying the method, acoustic wave curve correction in seismic processing can be effectively achieved, the influence of non-geological factors such as borehole diameter collapse and mud invasion is reduced, the acoustic wave curve quality is greatly improved, and the reliability of borehole seismic calibration is improved.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration and development, in particular to an acoustic wave curve correction method used in seismic processing. Background technique [0002] In geophysical exploration and development, acoustic logging curves as basic data play an important role in linking single well information with seismic data covering a wide range. However, in the long process of exploration and development, it is difficult to ensure that the acoustic wave curves of all wells use the same type of instruments, unified standard calibration device and the same operation method; meanwhile, the acoustic wave curves are vulnerable to environmental factors such as borehole collapse and mud invasion Affected by outliers. These non-geological factors will affect the quality of acoustic logging curves, thereby affecting seismic processing such as well-seismic calibration and seismic inversion. [0003] The current patents rel...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the defects and deficiencies in the above-mentioned prior art, considering the differences between seismic data and logging curves, and based on the geophysical properties of rocks, the multi-well difference correction of acoustic wave curves and the single-well abnormal layer Combined with segment correction, it provides a sound wave curve correction method suitable for seismic processing. Using this method, it can effectively solve the problem that the existing technology is easily affected by factors such as multi-well differences, seismic acquisition and processing, etc., resulting in correction results. inaccurate technical issues

Images