Method and device for predicting relative impedance based on dipole seismic wavelet multiple integrals

A multi-integration and re-integration technology, applied in the field of petroleum geophysical exploration, can solve problems such as inhomogeneity, insufficient depth, and modeling, and achieve the effect of improving accuracy and ideal effect.

Active Publication Date: 2013-12-11
PETROCHINA CO LTD
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Problems solved by technology

[0018] In 2004, Wang Xiwen and other geophysical experts systematically analyzed the model-based well-constrained wave impedance inversion in the article "Multi-well Logging Parameter Inversion Method and Application Constrained by Relative Wave Impedance Data Volume", the core of which is forward inversion In combination, the main problems are: first, the establishment of the initial wave impedance model is based on experience, which leads to multi-solution; second, the inhomogeneity of the fitting degree between the synthetic seismic record and the wellside seismic record causes the phenomenon of mo...

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  • Method and device for predicting relative impedance based on dipole seismic wavelet multiple integrals

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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] figure 1 It is a framework diagram of a method for predicting reservoir profiles based on dipole seismic wavelet direct multiple integral transformation in an embodiment of the present invention. Such as figure 1 As shown, the method of the present embodiment includes:

[0057] Step S101, perform well-seismic joint calibration based on logging-seismic data to extract wavelets and determine the time-depth relationship, and extract the top and bottom pa...

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Abstract

The invention discloses a method and device for predicting relative impedance based on dipole seismic wavelet multiple integrals. The method includes the first step of carrying out well logging and seismic joint calibration according to well logging and seismic data so as to extract wavelets and determine time depth relations, and extracting parameter characteristics of the top and bottom of a reservoir, the second step of building reservoir response characteristic wave functions of the dipole seismic wavelets according to the wavelets, the time depth relations and the parameter characteristics of the top and bottom of the reservoir, the third step of carrying out multiple integral operation on seismic sections according to the reservoir seismic response characteristic wave functions to extract and form a seismic response model database, and determining the best calculating integral multiple number and sliding window parameters, and the fourth step of carrying out the relative impedance operation on an actual seismic data volume according to the best calculating integral multiple number and the sliding window parameters to generate a relative impedance data volume. The method and device have the advantages that the integral characteristics of the seismic data are directly utilized to extract reservoir thickness characteristic parameters, the accuracy of reservoir seismic prediction is improved, and the effect for predicting the relative impedance of the reservoirs such as a carbonatite karst cave and sand shale is ideal.

Description

technical field [0001] The present invention relates to the field of petroleum geophysical exploration, in particular to a multiple seismic trace integration method using dipole seismic wavelets, and a prediction method that uses seismic profile information to perform continuous integration and accumulation from top to bottom into reservoir characteristic profiles, especially for The effect of relative impedance prediction for carbonate caves, sand-shale and other reservoirs is ideal. Background technique [0002] Petroleum geophysical exploration technology is one of the most widely used technical 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 boundary of the reservoir instead of the stratum reservoir. A direct reflection of the characteristics of the set. It is of great significance to oil and gas exploration and...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 杜斌山雍学善曹正林张平马富强
Owner PETROCHINA CO LTD
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