Reservoir wave impedance prediction method based on dipole wave

Abstract

The invention provides a reservoir wave impedance prediction method based on dipole wave, which comprises the following steps that: logging data is analyzed to acquire the corresponding parameter data of the seismic response characteristics of a reservoir; well seismic calibration is carried out according to the logging and seismic data so as to extract wavelets and determine the time-depth relationship; the seismic response characteristic wave function of impedance changes is constructed according to the parameter data, the wavelets and the time-depth relationship; the way integral characteristics of the logging data are extracted according to the seismic response characteristic wave function to form a seismic response model database; the seismic data beside a well is analyzed according to the seismic response model database to work out an impedance interpretation spectrum of the seismic data beside the well; a seismic trace is analyzed according to the seismic response model database to work out a data body wave impedance spectrum; and the wave impedance is predicted according to the seismic response model database, the impedance interpretation spectrum and the data body wave impedance spectrum. According to the reservoir wave impedance prediction method based on the dipole wave, the wave impedance of the reservoir is predicted through the seismic characteristics and wave impedance change rules based on the analysis to the logging data, so that the precision in predicting the wave impedance of the reservoir and the resolution to thin reservoirs are improved.

Description

technical field [0001] The invention relates to the field of petroleum geophysical exploration, in particular to the technical field of reservoir exploration, and specifically relates to a method for predicting reservoir wave impedance based on dipole waves. Background technique [0002] Petroleum geophysical exploration technology is one of the most widely used methods to find the spatial distribution and internal structure of oil and natural gas in underground reservoirs. The rock-acoustic characteristics recorded by seismic data are used to determine the lithology interface of the reservoir, which is very important for oil and gas exploration. development is of particular importance. [0003] The so-called seismic inversion process is to invert the lithological characteristics and reservoir parameters of the target layer by using the digital information collected in the seismic field. Seismic inversion is an important technique for seismic prediction of reservoirs, but i...

AI Technical Summary

Problems solved by technology

These reservoir seismic wave impedance inversion techniques generally have multiple solutions, which seriously reduces the accuracy of reservoir prediction and increases the difficulty of oil exploration.

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