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

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

Active Publication Date: 2021-04-16
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, device, equipment and medium based on pr model
  • Small-scale fracture modeling method, device, equipment and medium based on pr model
  • Small-scale fracture modeling method, device, equipment and medium based on pr model

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Experimental program
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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, device, equipment and medium based on the PR model. The method includes: determining the secondary variables related to the development of small-scale fractures, and counting the number of the secondary variables. Perform principal component analysis on the secondary variables to obtain multiple first principal component variables, optimize the first principal component variables, obtain multiple second principal component variables, and use the PR model to fuse multiple second principal component variables to obtain the inter-well The integrated fracture development probability body is used to constrain the single well fracture density curve with the inter-well comprehensive fracture development probability body, and the fracture density model is established. Based on the small-scale fracture geometry and fracture density model, the small-scale fracture model is established. Through this scheme, the uncertainty of the model can be reduced, and a small-scale fracture model with higher accuracy and reliability can be established, which provides a geological basis for numerical simulation of fractured reservoirs and is of great significance for improving the recovery of such 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 Patents(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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