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Multiple suppression method based on non-residual time difference

A multiple wave, non-residual technology, applied in the field of oil and gas exploration, can solve the problem of poor suppression effect, achieve the effect of improving imaging effect and meeting the needs of data regularization

Pending Publication Date: 2021-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a multiple wave suppression method based on non-residual moveout to solve the problem of poor suppression effect existing in the current multiple wave suppression process

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  • Multiple suppression method based on non-residual time difference
  • Multiple suppression method based on non-residual time difference
  • Multiple suppression method based on non-residual time difference

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] The present invention utilizes the inclination difference between the multiple wave and the primary wave in the stacking section, and suppresses the multiple wave of the short track by adopting the dip angle filter method for the single section of the short track, so as to supplement the deficiency of the conventional residual moveout method to suppress the multiple wave , to improve the imaging effect of deep weak reflection formations covered by multiple waves, and to improve the imaging effect of deep internal reflections with strong multiple wave energy but weak effective reflection and messy reflection, which can effectively suppress multiple Wave, can protect the signal of the primary wave, and can also meet the data regularization requirements of subsequent migration processing. The implementation process of this method is as f...

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Abstract

The invention relates to a multiple suppression method based on non-residual time difference, and belongs to the technical field of petroleum and natural gas exploration. According to the method, the inclination angle difference of the multiple waves and the primary waves on the stacked section is utilized, and the multiple waves of the near channel are suppressed by adopting an inclination angle filtering mode on the single section of the near channel, so that the defect of suppressing the multiple waves by a conventional residual time difference method is overcome, the imaging effect of a deep weak reflection stratum covered by the multiple waves is improved, and the method has a good improvement effect on the imaging effect of disordered deep inner curtain reflection with strong multiple wave energy and weak effective reflection, can effectively suppress near-channel multiple waves, can protect signals of primary waves, and can meet the requirements of subsequent migration processing on data regularization.

Description

technical field [0001] The invention relates to a multiple wave suppression method based on non-residual time difference, and belongs to the technical field of oil and gas exploration. Background technique [0002] In the data processing of seismic exploration, the existence of multiple waves is an important factor affecting the imaging effect of the underlying strata, and this effect is more fatal when the deep reflection energy is weak. At present, there are many methods for suppressing multiples, most of which use the residual time difference between primary waves and multiples to distinguish and suppress them in the CMP gather through various mathematical transformations (t-p transformation, FK transformation, etc.) multiple waves. This type of technology for suppressing multiple waves is relatively mature and has achieved good results in actual production. However, there are still some limitations. For the short-track multiples, the suppression effect is poor due to t...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36G01V1/362G01V1/364G01V2210/51
Inventor 黄德芹胡小波陈从希武雅波江富贵曾静凤尤丽铭詹风林张亚斌吕亚亮
Owner CHINA PETROLEUM & CHEM CORP