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An optimization method for temporary plugging and diversion between clustered perforation fractures in a horizontal well section

A technology of horizontal well section and optimization method, which is applied in design optimization/simulation, earthwork drilling and production, wellbore/well components, etc. It can solve problems such as weak applicability, and achieve the effect of strong versatility and reliable method principle

Active Publication Date: 2022-02-22
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some technologies also propose to realize the combination of fracture propagation simulation software and temporary plugging and diversion between clustered perforation fractures by indirect means, and obtain a series of regular cognitions about the optimal number of shots and the timing of shots, but its general applicability is weak and cannot be directly applied on a large scale

Method used

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  • An optimization method for temporary plugging and diversion between clustered perforation fractures in a horizontal well section
  • An optimization method for temporary plugging and diversion between clustered perforation fractures in a horizontal well section
  • An optimization method for temporary plugging and diversion between clustered perforation fractures in a horizontal well section

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Effect test

Embodiment 1

[0088] refer to Figure 4 , considering the fracture propagation coupling model of inter-fracture temporary plugging in the segment is the coupled fracture propagation steering judgment model and the force analysis and setting standard model of the temporary plugging ball, coupling the fracture propagation steering judgment model and the temporary plugging ball force analysis and The steps to set the standard model are:

[0089] Establish a fracture propagation and steering judgment model, undertake the output results of the crack propagation simulation control equation group, and at any time, based on any total number of fracture discrete units, the stress field solution calculated by the crack propagation simulation control equation , substituted into the fracture propagation and turning judgment model, the conclusion of whether it is necessary to continue to expand and the deflection angle of the crack tip can be calculated. Until it is judged that the fracture growth proc...

Embodiment 2

[0098] The embodiment of the present application provides a method for optimizing the timing of temporary plugging and throwing balls between clustered perforation fractures in a horizontal well section and the number of balls thrown. This method can be used in the pre-pressure design link. By establishing a mathematical model, it will be simulated and run by a computer for many times. accomplish.

[0099] see figure 1 , which shows the main processing flow of the method for optimizing the timing of pitching and the number of pitches for temporary blocking, including the following steps:

[0100] Step 1. Collect 4 types of field data for the relevant target wells: the first type of data is the logging data and interpretation data of the designed well section of the target well, especially including the profile curve data related to rock mechanical properties and the three-dimensional in-situ stress profile curve data ; The second type of data is the guidance information for f...

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Abstract

The invention discloses a method for optimizing the temporary plugging and turning ball throwing between clustered perforation fractures in a horizontal well section, and relates to the technical field of oil and gas well completion. The temporary plugging ball is set by establishing a fracture expansion coupling model considering the temporary plugging between fractures in the section. Design the optimal range of pitching timing and the number of pitching balls, solve the uniformity index of each group of fractures within the optimized range through the model, take the highest value of the cracking uniformity index, and the timing of pitching and the number of pitching balls corresponding to the highest value of the cracking uniformity index are used as the optimization of temporary blocking and turning to pitching As a result, the principle of the method is reliable and versatile, which can make up for the deficiencies of the existing technology and provide a strong basis for the pre-fracture design of fracturing engineers; In the plugging and turning pitching optimization method, by establishing a fracture expansion coupling model considering temporary plugging between fractures within a segment, the uniformity index of fractures after fracturing is solved, and the timing and number of balls thrown for temporary blocking are optimized to determine the optimal timing and number of balls thrown.

Description

technical field [0001] The invention relates to the technical field of oil and gas well completion, in particular to an optimization method for temporarily plugging and diverting balls between clustered perforation fractures in a horizontal well section. Background technique [0002] For oil and gas reservoir exploitation projects in complex formations, in order to ensure the economic benefits of industrial oil and gas exploitation, it is inevitable to take hydraulic fracturing stimulation measures. For the implementation of staged multi-cluster fracturing technology in horizontal wells, the uniform hydraulic fracture shape is more conducive to increasing oil and gas production, and the inter-stage cluster perforation and inter-fracture temporary plugging and diversion technology is a well completion that can effectively improve the uniformity of hydraulic fractures. means. [0003] The central idea of ​​inter-segment cluster perforation temporary plugging and diversion tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/13E21B43/26
CPCG06F30/20G06F30/13E21B43/261E21B2200/20
Inventor 刘畅蒋贝贝李海涛卢宇罗红文李颖
Owner SOUTHWEST PETROLEUM UNIV