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A Method for Predicting Reservoir Fractures Using Offset Vector Sheet Seismic Data

An offset vector and data prediction technology, which is applied in the field of geophysical exploration, can solve problems such as insufficient spatial resolution and low inversion accuracy, achieve stability and convergence, clear and concise expressions, improve calculation efficiency and Effect of Inversion Accuracy

Active Publication Date: 2017-12-15
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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  • A Method for Predicting Reservoir Fractures Using Offset Vector Sheet Seismic Data
  • A Method for Predicting Reservoir Fractures Using Offset Vector Sheet Seismic Data
  • A Method for Predicting Reservoir Fractures Using Offset Vector Sheet Seismic Data

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

[0042] The concept of offset vector sheet seismic pre-stack gather data described in the present invention is a general concept widely used in wide-azimuth seismic exploration technology in the field of petroleum and natural gas exploration. 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 receiver line distance, and each rectangle is an offset distance vector slice. The advantage of the offset vector slice processing technology is that the offset vector slice gather data retains more complete offset and azimuth angle information, provides more accurate seismic data for the study of azimuth anisotropy, and 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 pre-stack gather data. Background technique [0002] In the current oil and gas exploration, unconventional and subtle oil and gas reservoirs are becoming the focus of exploration, and fractured oil and gas reservoirs have become one of the important fields for increasing reserves and increasing production of oil and gas in the world today. In reservoir prediction and oil and gas development, fractures play a vital role. Fractures increase the reservoir space and improve the matrix permeability and pore connectivity of the reservoir. Therefore, reservoir fracture prediction has become an important task in exploration and development. key technologies. [0003] Seismic exploration data contains fracture information, and seismic method is an important means to identify fractured ...

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Application Information

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Patent Type & Authority Patents(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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