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Three-dimensional seismic data processing quality monitoring technology

A quality monitoring, three-dimensional seismic technology, applied in the field of petroleum geophysical exploration, can solve problems such as difficulty in achieving the best monitoring effect, difficulty in achieving a comprehensive understanding of data and monitoring data, time-consuming and labor-intensive, and achieve effective and economical quality monitoring. Interference ability, the effect of small amount of calculated data

Active Publication Date: 2008-10-29
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

This monitoring method cannot truly reflect the problems existing in the data, and it is difficult to achieve the purpose of comprehensively understanding and monitoring the data
[0010] In addition, the quality and processing effect of seismic data during detection mainly rely on personal experience for evaluation and analysis, and human factors are greatly affected, making the final processing results vary from person to person, time-consuming and laborious, and it is difficult to achieve the best monitoring effect

Method used

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  • Three-dimensional seismic data processing quality monitoring technology
  • Three-dimensional seismic data processing quality monitoring technology
  • Three-dimensional seismic data processing quality monitoring technology

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Embodiment Construction

[0045] The main factors affecting the quality of seismic data are excitation energy, excitation wavelet and noise interference.

[0046]The excitation energy directly reflects the state at the time of excitation, and it can reflect the differences in factors such as the near-surface lithology, excitation depth, and explosion effect of the excitation. The change of excitation energy will affect the seismic amplitude, wavelet frequency, wavelet phase, etc.; thereby directly affecting the effect of seismic imaging and the accuracy of reservoir information inversion. Effectively analyzing the excitation energy change of data during processing is one of the important bases for fidelity processing monitoring.

[0047] The excitation wavelet is important information for identifying the spatial variation of oil and gas reservoirs in seismic inversion. In the high-resolution seismic exploration of lithologic oil and gas reservoirs, the quality of the excitation wavelet will directly af...

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Abstract

This invention relates to three-dimensional seismic data processing quality monitoring technology. Selecting time-window and analysis frequency for FFT to obtain frequency-domain conversion result for every channel; taking mean-filter to obtain the statistic excited energy or noise disturbance; plotting all results on plane graph to monitor the 3D excited energy or noise disturbance; taking normalization and autocorrelation to all earthquake channel; summating all autocorrelation statistic result to obtain opposite statistic autocorrelation result; finding out and plotting the zero-crossing of autocorrelation on plane position for monitoring excited wavelet. This invention computes fast with small data quantity and reliable result.

Description

technical field [0001] The invention relates to petroleum geophysical exploration technology, in particular to a three-dimensional seismic data processing quality monitoring technology. technical background [0002] Petroleum seismic exploration is a geophysical exploration method that uses artificial methods to generate seismic waves, investigates underground geological structures and changes in rock formations, and searches for oil and gas fields by studying the propagation of seismic waves in underground rock formations. Seismic exploration can be divided into three major links: seismic data acquisition, seismic data processing, and seismic data interpretation. [0003] Seismic data acquisition is to generate seismic waves artificially. On land, an explosive source is usually used, and a shallow well is drilled at a selected shot point. The depth of the well is generally 6-30 meters. The amount of explosives is generally 1-25 kg, and the electric detonator is put into th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36G01V1/28
Inventor 凌云高军
Owner BC P INC CHINA NAT PETROLEUM CORP
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