Small-scale fracture modeling method and device based on PR model, equipment and medium

A modeling method and small-scale technology, applied in the fields of petroleum engineering and petrophysics, which can solve the problem of low reliability of small-scale fracture models

Active Publication Date: 2019-01-25
CHINA UNIV OF PETROLEUM (BEIJING) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a single seismic information or geological information is often affected by multiple factors and has multiple solutions, which makes the small-scale fracture model established less reliable

Method used

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  • Small-scale fracture modeling method and device based on PR model, equipment and medium
  • Small-scale fracture modeling method and device based on PR model, equipment and medium
  • Small-scale fracture modeling method and device based on PR model, equipment and medium

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Effect test

Embodiment 1

[0060] figure 1 A schematic flow chart of the small-scale fracture modeling method based on the PR model provided by Embodiment 1 of the present invention, as shown in figure 1 As shown, the method may include the following steps:

[0061] S101. Determine secondary variables related to the development of small-scale fractures, and count the number of secondary variables.

[0062] In practical applications, the implementation subject of this embodiment may be a PR model-based small-scale fracture modeling device. In practical applications, the small-scale crack modeling device based on the PR model can be realized by a virtual device, such as software code, or by a physical device written with relevant execution codes, such as a U disk, or, it can also be It is realized through physical devices integrated with relevant execution codes, such as smart terminals, various computers, etc.

[0063] Specifically, the above-mentioned types of secondary variables may include: geologi...

Embodiment 2

[0080] figure 2 The schematic flow chart of the small-scale crack modeling method based on the PR model provided by Embodiment 2 of the present invention, on the basis of Embodiment 1, such as figure 2 As shown, the method may include the following steps:

[0081] The above step S101 may specifically include:

[0082] S201. Analyze the main factors controlling the development of small-scale fractures, and determine secondary variables related to the development of small-scale fractures according to the analysis results.

[0083] Specifically, the main controlling factors for the development of small-scale fractures can be analyzed, and various geological information and seismic attributes related to the development of small-scale fractures can be determined according to the analysis results. Among them, the seismic attributes sensitive to small-scale fractures are preferred, and only the one with the best correlation with fracture development is selected for the same type ...

Embodiment 3

[0094] image 3 The structural schematic diagram of the small-scale fracture modeling device based on the PR model provided by Embodiment 3 of the present invention, as shown in image 3 shown, including:

[0095] The determining module 310 is configured to determine secondary variables related to the development of small-scale fractures, and count the number of secondary variables.

[0096] The first principal component module 320 is configured to perform principal component analysis on the secondary variables to obtain a plurality of first principal component variables.

[0097] The second principal component module 330 is configured to optimize the first principal component variables to obtain multiple second principal component variables.

[0098] The fusion module 340 is configured to use the PR model to fuse a plurality of second principal component variables to obtain a comprehensive fracture development probability body between wells.

[0099] The first building mod...

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Abstract

The invention discloses a small-scale fracture modeling method and device based on a PR model, equipment and a medium, wherein the method comprises: determining the secondary variables related to thedevelopment of small-scale fractures, and counting the number of the secondary variables, A principal component analysis is performed on the secondary variables, obtaining a plurality of first principal component variables, A first principal component variable is preferred, A plurality of second principal component variables are obtained, and a comprehensive fracture development probability volumebetween wells is obtained by fusing the plurality of second principal component variables with a PR model. The fracture density curve of a single well is constrained by the comprehensive fracture development probability volume between wells, and a fracture density model is established, and a small-scale fracture model is established according to small-scale fracture geometry and a fracture density model. This scheme can reduce the uncertainty of the model and establish a small-scale fracture model with higher accuracy and reliability, which provides a geological basis for the numerical simulation of fractured reservoirs and is of great significance to enhancing the recovery factor of this kind of reservoirs.

Description

technical field [0001] The invention relates to the fields of petroleum engineering and rock physics, in particular to a PR model-based small-scale fracture modeling method, device, equipment and medium. Background technique [0002] In fractured reservoirs, fractures are effective storage spaces and important seepage channels, which affect oil and gas accumulation, enrichment law, sweet spot distribution, single well productivity and development effect. Fracture modeling is a three-dimensional quantitative model that reflects the characteristic parameters of fractures and the spatial distribution of fractures. This model can not only reflect the distribution of fractures, but also meet the needs of reservoir engineering research. It is of great significance to the exploration and development of fractured reservoirs. [0003] At present, the fracture models are mainly divided into two categories: one is the continuous medium fracture model based on the equivalent idea, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G01V99/00
CPCG01V99/005G06F18/2135
Inventor 孙爽侯加根刘钰铭宋随宏赵淑霞周银邦何应付
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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