Well-constrained pre-stack elastic parameter inversing method for modulating supplemented subspace

Abstract

The invention relates to a well-constrained pre-stack elastic parameter inversing method for modulating supplemented subspace, belonging to the field of seismic log. The method provided by the invention has the advantages that: the computation time is shortened so that the running time is shortened and the cost is reduced; the processing parameters can be adjusted so that a better processing result can be obtained; the frequency-increasing data wave group detailed information is not abundant so that the wave group characteristics of original seismic events and the interlaminar information of original profiles are maintained and the resolution of the profiles is enhanced; the undue dependence on a stratified model is avoided to ensure that the information of combined reconstruction beside the well is preferably fitted with the log information, and the non-stratified information contained in seismic data can be fully reflected outside the well; therefore, the problem of matching the seismic data of reservoir stratums (stratums such as fluvial facies reservoir stratum, carbonatite pore and fissure and hole intensive belt and the like ) with reticular characteristics with the well information is solved.

Description

1. Technical field [0001] The invention relates to a well-constrained pre-stack elastic parameter inversion method for modulating and supplementing subspace, which belongs to the high-frequency reconstruction method of well-constrained seismic data and belongs to the field of seismic logging. 2. Background technology [0002] The logging data is closely combined with the well-passing seismic data, and the insufficient bandwidth of the seismic data is supplemented by the high-frequency information-rich logging data, thereby improving the resolution of the seismic data and avoiding excessive dependence on the layered model. The information fits better with the logging data near the well, and can fully reflect the non-layered information contained in the seismic data outside the well, and can describe the characteristics of the reservoir in detail. A set of wave elastic parameters of the logging-seismic data Joint inversion techniques and methods. [0003] In recent years, the...

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Problems solved by technology

The Fusion Petroleum Technology Company of the United States claims to have developed a revolutionary broadband spectral inversion technology, which can eliminate wavelets and does not require well calibration, no prior model, and no horizon information. principle of confidentiality

In 2003, another high-frequency recovery technology, HiSpec technology, was tested, claiming to use the technology of low-frequency projection to high-frequency, the effect is that the event is thinner, the small event is increased, but the continuity is still good

Spectral whitening is zero-phase, it does not change the phase spectrum of seismic data, but there are the following problems: the splicing between adjacent frequency bands is prone to distortion; the frequency band should not be too small, otherwise it will cause more serious Gipps effect; Generate strong high-frequency noise

[0010] However, the existing technology has the following deficiencies: (1) The existing method takes a long time to calculate, and the general work area needs several hours to several days to complete a process, which requires parallel processing and high operating costs; (2) It is not suitable for repeated adjustments (3) The wave group details of the obtained frequency-uplifting data are not rich, and the events are simply thinned or broken, which cannot show the characteristics of alternating thickness and thickness of the seismic section, and the layers of the original section are lost. (4) Excessive reliance on layered models is not suitable for seismic data of reservoirs with network characteristics (fluvial facies reservoirs, formations with dense pores, fractures and caves in carbonate rocks, etc.)

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