Accurate well control speed correction method for spherical diffusion compensation

A technology of spherical diffusion and correction method, which is applied in the field of well control compensation, can solve the problems of weak response and formation viscosity characteristics, unfavorable amplitude fidelity, and inability to reflect surface changes, etc., and achieves the effect of accurate correction speed and wide application range

Active Publication Date: 2020-04-24
恒泰艾普(北京)能源科技研究院有限公司
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Problems solved by technology

For 3D seismic data with large structural fluctuations, the early well control technology cannot reflect the absorption, weak response and formation viscosity characteristics of the formation; it cannot reflect the surface change; it cannot reflect the spatial change; fidelity is detrimental

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  • Accurate well control speed correction method for spherical diffusion compensation
  • Accurate well control speed correction method for spherical diffusion compensation
  • Accurate well control speed correction method for spherical diffusion compensation

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] VSP is the abbreviation of Vertical Seismic Profiling, which is the vertical seismic profile method in Chinese. Surface earthquakes are usually collected by placing both the source and the receiver on the ground; and the VSP technology is to place one of the source and the receiver in the underground. collection technology.

[0035] Conventional spherical diffusion amplitude compensation methods often use an optimal compensation parameter, spherical diffusion compensation based on velocity, generally using the regional vel...

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Abstract

The invention provides an accurate well control speed correction method for spherical diffusion compensation. The method comprises the following steps: S1, screening well logging data of a whole area,generating an RMS speed according to a VSP speed or a well logging curve, and finding an abnormal point of the RMS speed; S2, substituting the abnormal point into a well velocity model of the whole area, and converting the abnormal point into stratum velocity containing abnormal velocity; S3, restraining the pickup of the seismic velocity by using the well velocity model, and correcting the abnormal point to form a well control velocity field; and S4, applying the well control velocity field to a spherical diffusion compensation program. According to the invention, the compensation factor andthe well control velocity field are used as parameters of whole-area amplitude compensation, so that space change can be reflected; and the method can be used in complex areas and is wide in application range.

Description

technical field [0001] The invention relates to the technical field of well control compensation, in particular to a precise well control speed correction method for spherical diffusion compensation. Background technique [0002] In the process of seismic signal propagating underground, the energy has a certain attenuation, and there is also a difference in energy between transverse shots and shots. There are generally two factors that affect the seismic amplitude: one is that with the increase of the propagation distance, the energy of the seismic reflection signal decreases rapidly, which makes the difference between deep and shallow reflection energy very different, which is not conducive to seismic imaging and geological analysis. It is caused by geological factors and needs to be restored or compensated. Such factors include spherical diffusion, absorption attenuation, etc. They mainly cause energy differences in the vertical direction, and their influence is a function...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/48G01V1/36
CPCG01V1/48G01V1/362
Inventor 李文杰陈卫锋高运山张丽魏雄辉张梅华
Owner 恒泰艾普(北京)能源科技研究院有限公司
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