Method and device for channel sand body prediction based on sub-azimuth stacking

A technology of channel sand body and prediction method, applied in the field of geophysical exploration, can solve the problems of reducing the resolution of seismic data and the recognition accuracy of target geological bodies, and achieve the effect of improving the recognition accuracy

Active Publication Date: 2020-04-10
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

However, this omni-directional seismic data stacking method will annihilate the anisotropic characteristics of strata and geological bodies, thereby reducing the resolution of seismic data and the identification accuracy of target geological bodies.

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  • Method and device for channel sand body prediction based on sub-azimuth stacking
  • Method and device for channel sand body prediction based on sub-azimuth stacking
  • Method and device for channel sand body prediction based on sub-azimuth stacking

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[0061] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0062] refer to figure 1 As shown, the channel sand body prediction method based on sub-azimuth stacking in the embodiment of the present application may include the following steps:

[0063] S101. Determine the main provenance direction of the target layer in the work area, the characteristics of the fault system of the target layer and...

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Abstract

The embodiment of the present invention provides a method and device for forecasting a channel sand body based on sub-azimuth superimposition. The method comprises a step of determining a main sourcedirection of a target layer in a work area and fracture system features of the target layer and an upper strata, a step of obtaining an OVR-domain-based regularized offset gather of the target layer,a step of dividing the regularized offset gather into multiple groups of sub-orientation superposition gathers according to azimuths according to the main source direction and the fracture system features, and determining a sub-orientation superposition gather which is perpendicular to the main source direction, a step of carrying out wave impedance inversion on the sub-orientation superposition gather perpendicular to the main source direction and obtaining an inversion profile, and a step of extracting a plane in the inversion profile and obtaining plane distribution of the channel sand bodyin the target layer. According to the embodiment of the present invention, the recognition accuracy of river channel sand body forecasting can be improved.

Description

technical field [0001] The present application relates to the technical field of geophysical exploration, in particular to a channel sand body prediction method and device based on sub-azimuth stacking. Background technique [0002] Channel sand bodies have good physical characteristics such as porosity and permeability, and are one of the good places for oil and gas accumulation. If the paleo-river sand body is close to the oil source, it can become a reservoir of oil and gas. Therefore, channel sand body prediction is of great significance in the field of oil and gas exploration. [0003] At present, the prediction of channel sand bodies is mostly based on the stacking method of omni-directional seismic data. However, when there are anisotropic geological bodies underground, the seismic information of different azimuths shows different characteristics, showing the phenomenon of hour difference / high velocity and strong amplitude in the direction of anisotropy extension. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 郭继茹徐颖新张军勇唐建超何静波
Owner BC P INC CHINA NAT PETROLEUM CORP
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