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Method for extending a network of existing fractures

A fissure network and fissure technology, applied in the field of rock fracturing, can solve problems such as pressure control difficulties and achieve the effect of less pollution

Inactive Publication Date: 2014-05-14
TOTAL PUTEAUX FR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, control of pressure can be difficult in these techniques

Method used

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  • Method for extending a network of existing fractures
  • Method for extending a network of existing fractures
  • Method for extending a network of existing fractures

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Experimental program
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Embodiment Construction

[0068] Figure 1a is an overview of a wellbore containing an apparatus for extending an existing fracture, in a specific embodiment.

[0069] In FIG. 1 a a wellbore has been drilled in the formation 100 . Fractures 101 exist in this formation. In the wellbore, a casing 102 is installed and connected to the fracture 101, for example, through perforations (not shown). Perforations are made, for example, by using explosives to blast holes in casing and cement slabs.

[0070] In the casing, different spaces can be defined. A first space 111 called the plenum space, through a cylinder delimited by the sides of the casing 102, houses a first plug / disc 103 in the casing (this first plug / disc 103 may be located in the well The top wellhead may alternatively be defined by an additional plug in the wellbore) and the upper packer 104. A second space 112, called the confined space, is bounded by a cylinder delimited by the sides of the casing 102, the upper packer 104 and the bridge pl...

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Abstract

The present invention relates to a method for extending a network of existing fractures in a subterranean formation. This method comprises pumping a first fluid into a pressurized volume to pressurize a compressible fluid in said pressurized volume to a predetermined pressure and releasing a second fluid out of the pressurized volume in a confined volume connected to the existing fractures, the second fluid being released due to a relaxation of the pressurized compressible fluid in the pressurized volume. Moreover, the release of second fluid exerts pressures in the existing fractures exceeding a fracturing threshold of the subterranean formation.

Description

technical field [0001] The present invention relates to methods of fracturing rock in geological formations. Background technique [0002] The approaches described in this section are possible, but not necessarily approaches that have been conceived or implemented before. Therefore, unless otherwise indicated herein, the approaches described in this section are not prior art to the claims in this application and are not admitted to be prior art by inclusion in this section. Furthermore, not all embodiments are necessarily intended to address all, or even any, of the issues raised in this section. [0003] In order to increase or restore the rate at which fluids (such as oil, water, or natural gas) can be produced from subterranean natural reservoirs, it is necessary to fracture the rock in the formation. [0004] Reservoirs are usually porous sandstone, limestone or dolomitic limestone, but also include "unconventional reservoirs" such as shale or coal seams. Rock fractur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 金-弗朗索斯·莱昂
Owner TOTAL PUTEAUX FR