Method of predicting reservoir fractures based on offset vector tile seismic data

A technology of offset vector and data prediction, which is applied in the field of geophysical exploration and can solve the problems of insufficient spatial resolution and low inversion accuracy.

Active Publication Date: 2016-11-09
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

For example, one of the objectives of the present invention is to overcome the shortcomings of conventional narrow-azimuth pre-stack seismic fracture prediction technology, such as low inversion accuracy and insufficient spatial resolution, and propose a stacking method using wide-azimuth offset vector sheet seismic data. Prediction method of front-azimuth anisotropic fracture parameters (for example, fracture development density, fracture orientation)

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  • Method of predicting reservoir fractures based on offset vector tile seismic data
  • Method of predicting reservoir fractures based on offset vector tile seismic data
  • Method of predicting reservoir fractures based on offset vector tile seismic data

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Embodiment Construction

[0041] Hereinafter, a method for predicting reservoir fractures using offset vector patch seismic prestack gather data according to the present invention will be described in detail with reference to exemplary embodiments.

[0042] The concept of offset vector slice seismic prestack gather data described in the present invention is a general concept widely used in wide-azimuth seismic exploration technology in the field of oil and natural gas exploration at present. The so-called offset vector slice means that a common receiver line shot set is divided into many small rectangles according to the equal distance between the shot line distance and the detection line distance, and each rectangle is an offset distance vector slice. The advantage of the offset vector patch processing technology is that the offset vector patch gather data retains more complete offset and azimuth information, providing more accurate seismic data for azimuthal anisotropy research, which is conducive to ...

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Abstract

The invention provides a method of predicting reservoir fractures based on offset vector tile seismic pre-stack gather data. The reservoir fracture development density and fracture azimuth are directly inverted based on offset vector tile seismic data containing azimuth information. The defects of the conventional narrow-azimuth pre-stack seismic fracture prediction technology, such as low inversion accuracy and low spatial resolution, are overcome. More comprehensive and complete offset and azimuth information can be retained. More suitable seismic data is provided for azimuth anisotropy research. The method is more advantageous to the identification of fault, fracture and reservoir air water variation characteristics.

Description

technical field [0001] The invention relates to geophysical exploration technology, in particular to a method for predicting reservoir fractures by using Offset Vector Tile (OVT) wide-azimuth seismic prestack gather data. Background technique [0002] In the current oil and gas exploration, unconventional and concealed oil and gas reservoirs are becoming the focus of exploration, and fractured oil and gas reservoirs have become one of the important areas for increasing oil and gas reserves and production in the world today. Fractures play a crucial role in reservoir prediction and oil and gas development. Fractures increase the reservoir space, improve the matrix permeability and void connectivity of the reservoir. Therefore, reservoir fracture prediction has become an important part of exploration and development. key technology. [0003] Seismic exploration data contains fracture information. Seismic method is an important means to identify fractured reservoirs, and its t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306
Inventor 谢万学巫芙蓉李德珍何光明雷虹陈丹王珑
Owner BC P INC CHINA NAT PETROLEUM CORP
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