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Method and system for optimizing multi-cluster fracturing in horizontal well section

A technology of horizontal well section and optimization method, which is applied in the directions of multi-objective optimization, design optimization/simulation, earth-moving drilling and production, etc. It can solve the problems of not considering wellbore friction and two-dimensional, and achieve the effect of good optimization effect.

Active Publication Date: 2017-09-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At present, there are certain defects in the optimal design of multi-cluster perforation fracturing in horizontal well intervals. For example, in the numerical calculation model of multi-cluster fracture propagation in the established section, the assumed fracture height is a fixed value, that is, the model is two-dimensional
Or, considering inter-fracture stress interference and inter-cluster flow dynamic distribution, a pseudo-3D model of multi-cluster fracture propagation in a segment is established, but wellbore friction is not considered, and the fracture height is calculated by static fracture mechanics, so that the cracks and fractures Not much difference between tip rallies

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  • Method and system for optimizing multi-cluster fracturing in horizontal well section
  • Method and system for optimizing multi-cluster fracturing in horizontal well section
  • Method and system for optimizing multi-cluster fracturing in horizontal well section

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0041] It should be noted that like numerals and let...

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Abstract

An embodiment of the invention provides a method and system for optimizing multi-cluster fracturing in a horizontal well section and applies to an apparatus for optimizing multi-cluster fracturing in a horizontal well section. The method includes: constructing a fracturing fluid flow control equation set, a stress interference calculation control equation set and a multi-fracture synchronous expansion three-dimensional morphology calculation equation set according to stratum parameters and multiple construction parameter sets, and constructing, on such basis, an internal multi-cluster fracture three-dimensional expansion model of a horizontal well section by considering inter-fracture stress and dynamic flow distribution; simulating fracture morphology under different construction parameters according to the constructed internal multi-cluster fracture three-dimensional expansion model of the horizontal well section so as to optimize construction parameters. The method and system according to the invention consider multiple influence factors to establish the internal multi-cluster fracture three-dimensional expansion model of the horizontal well section, and good optimization is achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas field stimulation and transformation, in particular to a multi-cluster fracturing optimization method and system in a horizontal well section. Background technique [0002] Unconventional reservoirs (shale oil and gas, tight sandstone oil and gas) have the characteristics of tightness and low permeability. For this type of reservoir, it is necessary to perform staged multi-cluster fracturing in horizontal wells and increase the contact area between artificial fractures and the reservoir. Such reservoirs have been exploited industrially. Staged multi-cluster fracturing of horizontal wells refers to the use of packers to isolate a certain length of the horizontal section to be fractured, and to perform multi-cluster perforation fracturing at a certain interval (cluster spacing) in the section to be fractured. After the first stage of fracturing is completed, the setting position of the packer i...

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02E21B43/26
CPCE21B43/26G06F30/20G06F2111/06G06Q50/02
Inventor 李小刚易良平杨兆中刘长印孙志宇
Owner CHINA PETROLEUM & CHEM CORP
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