Fault constraint chromatography inversion method and inversion system

A technology of constrained layers and tomographic equations, applied in the field of fault-constrained tomographic inversion methods and inversion systems, can solve problems such as failure to meet the requirements of exploration and development efficiency, time-consuming and labor-intensive, etc., to reduce manual workload, shorten The effect of processing cycle and improving work efficiency

Active Publication Date: 2020-03-27
CHINA PETROLEUM & CHEM CORP +1
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However, by constructing the tomographic preconditioning operator method that includes geological structure information, t

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  • Fault constraint chromatography inversion method and inversion system
  • Fault constraint chromatography inversion method and inversion system
  • Fault constraint chromatography inversion method and inversion system

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[0114] Example

[0115] figure 1 A flowchart of a fault-constrained tomographic inversion method according to an embodiment of the present invention is shown. figure 2 The original seismic imaging section of a fault-constrained tomographic inversion method according to an embodiment of the present invention is shown. image 3 Shows a fault attribute diagram of a fault-constrained tomographic inversion method according to an embodiment of the present invention. Figure 4 Shows a seismic imaging section view of a fault-constrained tomographic inversion method according to an embodiment of the present invention. Figure 5a Shows a high-steep section seismic imaging image of a fault-constrained tomographic inversion method that does not consider fault-constrained velocity modeling according to an embodiment of the present invention. Figure 5b Shows a high-steep section seismic imaging image of a fault-constrained tomographic inversion method according to an embodiment of the present i...

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Abstract

The invention discloses a fault constraint chromatography inversion method and inversion system. The method comprises the following steps: step 1, calculating an underground geological inclination angle and a fault attribute of a migration profile based on a seismic migration image; step 2, based on the underground geological inclination angle and the fault attribute, constructing a structure constraint precondition chromatography equation set; and step 3, solving and constructing a constraint precondition chromatography equation set to obtain an underground speed model and an offset profile.Automation of the whole tomography inversion iteration process is achieved, manual intervention is not needed, the manual workload is reduced, the processing period is shortened, and the working efficiency is improved; the underground geological dip angle and the fault attribute are introduced to constrain the speed model, so that the speed model obtained through inversion has high precision in acomplex structure area, especially a fault development area, and the requirement of subsequent migration imaging is met.

Description

technical field [0001] The invention belongs to the field of seismic imaging and inversion, and in particular relates to a fault-constrained tomography inversion method and an inversion system. Background technique [0002] Limited by factors such as illumination aperture and acquisition signal-to-noise ratio, the resolution of traditional surface seismic imaging lacks information in the middle wavenumber band. That is, the long-wavelength and low-frequency components of subsurface velocity can be well recovered by conventional ray tomography, and the high-wavenumber reflection coefficient can be described by migration imaging, while the high-precision velocity model in the middle-wavenumber range is difficult to be accurately inverted. [0003] With breakthroughs in "two wide and one high" (broadband, wide azimuth, high density) seismic acquisition and tomographic inversion methods, the resolution of traditional seismic imaging has been broadened. The "two wide and one hig...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 倪瑶蔡杰雄
Owner CHINA PETROLEUM & CHEM CORP
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