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Natural fracture modeling and fracturing simulation method and device, computer and storage medium

A natural fracture and fracturing technology, applied in the field of seismic exploration and development, can solve the problems of unrealistic seismic data fracturing simulation, irregular distribution, and complex development of favorable reservoirs, so as to achieve economical and effective exploration and development, and reduce ambiguity Effect

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Shale gas natural fracture reservoirs are characterized by complex development and irregular distribution of favorable reservoirs. Existing technologies mainly use a single technology to predict and describe the distribution of fractures, but a single technology often has great uncertainty and Multi-solution, at the same time, it is impossible to use seismic data for fracturing simulation based on material point method

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  • Natural fracture modeling and fracturing simulation method and device, computer and storage medium
  • Natural fracture modeling and fracturing simulation method and device, computer and storage medium
  • Natural fracture modeling and fracturing simulation method and device, computer and storage medium

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Embodiment 1

[0057] In this embodiment, as figure 1 As shown, a natural fracture modeling and fracturing simulation method is provided, which includes:

[0058] Step 110, establishing a three-dimensional geological grid model of the preset work area.

[0059] Specifically, the preset work area is a work area that needs to perform natural fracture modeling and fracturing simulation. In the following embodiments, the preset work area is the X work area.

[0060] In this step, a three-dimensional geological grid model is established using the collected seismic horizon interpretation results. The seismic horizon interpretation results are the horizon and fault interpretation results in the study area. For example, the horizon data and fault data of the study area are obtained, the 3D geological data of the preset work area is obtained, and the 3D geological grid model of the preset work area is established based on the 3D geological data of the preset work area.

[0061] Step 120: Calculate...

Embodiment 2

[0094] This application uses seismic data for natural fracture modeling and fracturing simulation to realize the integration of geology, geophysical exploration and engineering, which can maximize the potential of reservoirs, improve the fracturing effect of shale gas horizontal wells, and achieve the purpose of economical and effective exploration and development. , which lays a foundation for the development of shale gas horizontal wells and is innovative.

[0095] In this embodiment, a method for natural fracture modeling and fracturing simulation using seismic data is provided, and a comprehensive fracture modeling based on seismic-geology-logging-rock mechanics is used to define favorable reservoir (sweet spot) development areas, On this basis, artificial fracturing simulation is carried out for the drilled horizontal well positions and predicted horizontal well positions to verify and predict the fracturing effect.

[0096] Specifically, in this embodiment, a structural ...

Embodiment 3

[0106] First, as Figure 4 As shown, the 3D geological grid model of X work area is established. In this embodiment, the preset work area is the X work area. Based on the seismic data of the X work area, the seismic curvature attributes and similarity attributes reflecting faults and natural fractures, such as post-stack attributes and pre-stack inversion attributes, are calculated, and the import, after importing, such as Figure 5 shown.

[0107] The post-stack properties reflecting faults and natural fractures can be obtained by at least one of the following methods: coherent volume technology, curvature technology, ant volume technology, and discontinuity detection technology. It should be understood that other methods in the prior art may also be used for obtaining the post-stack properties reflecting faults and natural fractures, which are not listed one by one in this embodiment. In addition, in this application, the pre-stack inversion-like attributes are obtained b...

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Abstract

The invention provides a natural fracture modeling and fracturing simulation method and device, a computer and a storage medium. The method comprises the steps that a three-dimensional geological grid model of a preset work area is established; calculating to obtain post-stack attributes and pre-stack inversion class attributes reflecting faults and natural fractures, and importing the post-stack attributes and the pre-stack inversion class attributes into the three-dimensional geological grid model; on the basis of the three-dimensional geological grid model and on the basis of the ground coarsened curve information, a neural network algorithm is adopted to predict distribution of reservoir attributes in space, and a natural fracture model of the preset work area is obtained; on the basis of the natural fracture model, the average fracture surface density attribute of a target layer is extracted, and equivalent natural fracture information is generated; and performing fracturing simulation according to the natural fracture parameters. A fracture development distribution model, namely a natural fracture model, is established through a neural network algorithm by utilizing pre-stack attributes and post-stack attributes of seismic data in combination with geology, lithology and logging information, so that multiplicity of solutions of fractured reservoir prediction is reduced.

Description

technical field [0001] The invention relates to the technical field of seismic exploration and development, in particular to a natural fracture modeling and fracturing simulation method, device, computer and storage medium. Background technique [0002] The characteristics of shale gas natural fractured oil and gas reservoirs are the complex development and irregular distribution of favorable reservoirs. The existing technology mainly uses a single technology to predict and describe the fracture distribution law, but a single technology often has great uncertainty and distribution. Due to the multiple solutions, it is impossible to use seismic data for fracturing simulation based on the material point method. [0003] In the development of unconventional shale gas horizontal wells, the fracturing effect of each well varies greatly, and the test production also varies greatly; in the shale gas development engineering stage, the completion engineer lacks understanding of the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/27G01V1/28G06F119/14
CPCG06F30/23G06F30/27G01V1/282G06F2119/14
Inventor 齐晴陈勇王彬权郑连弟董清源许凯裴思嘉胡玮张渝悦
Owner CHINA PETROLEUM & CHEM CORP
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