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Oil and gas well fracture network system fracturing technology

A technology for oil and gas wells and fracture networks, which is applied in the fields of production fluids, wellbore/well components, and earth-moving drilling, etc. It can solve the problems of limited seepage area and poor oil and gas supply capacity of the fracture system, and achieve the effect of increasing the seepage volume of the well.

Inactive Publication Date: 2015-12-30
DAQING JINGTAI PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fracturing process for the fracture network system of oil and gas wells, which overcomes the problems that the artificial fracture formed after hydraulic fracturing is only a single main fracture, the seepage area is limited, and the fracture system has poor oil and gas supply capacity.

Method used

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  • Oil and gas well fracture network system fracturing technology
  • Oil and gas well fracture network system fracturing technology
  • Oil and gas well fracture network system fracturing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The oil and gas well fracture network system fracturing process of the present invention is tested on the oil field, the well depth is 1762.39 meters, and the method comprises the following steps during use:

[0018] (1) perforating on the tubing 1;

[0019] (2) Utilize the packer 2 to block the upper and lower ends of the perforation 3;

[0020] (3) Fracturing fluid, with a pressure of 36MPa, is injected through perforations to form main fractures 4 in the formation;

[0021] (4) Use a temporary plugging agent to block the main crack;

[0022] (5) Increase the pressure of the fracturing fluid by 5-10 MPa and inject it again through perforation to form a large number of secondary fractures 5 around the main fractures in the formation.

Embodiment 2

[0024] The oil and gas well fracture network system fracturing process of the present invention is tested on the oil field, the well depth is 2301.9 meters, and the method comprises the following steps during use:

[0025] (1) perforating on casing 1;

[0026] (2) Utilize the packer 2 to block the upper and lower ends of the perforation 3;

[0027] (3) Fracturing fluid, with a pressure of 44.6MPa, is injected through perforations to form main fractures 4 in the formation;

[0028] (4) Use a temporary plugging agent to block the main crack;

[0029] (5) Increase the pressure of the fracturing fluid by 5-10 MPa and inject it again through perforation to form a large number of secondary fractures 5 around the main fractures in the formation.

Embodiment 3

[0031] The oil and gas well fracture network system fracturing process of the present invention is tested on the oil field, and the well depth is 3262.65 meters. The method includes the following steps when used:

[0032] (1) perforating on casing 1;

[0033] (2) Utilize the packer 2 to block the upper and lower ends of the perforation 3;

[0034] (3) Fracturing fluid, with a pressure of 55.2MPa, is injected through perforations to form main fractures 4 in the formation;

[0035] (4) Use a temporary plugging agent to block the main crack;

[0036] (5) Increase the pressure of the fracturing fluid by 5-10 MPa and inject it again through perforation to form a large number of secondary fractures 5 around the main fractures in the formation.

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Abstract

The invention relates to an oil and gas well fracture network system fracturing technology. The method comprises the following steps that perforation is carried out on an oil pipe; packers are utilized for blocking the upper end and the lower end of a perforated hole; fracturing liquid is injected through the perforated hole to enable a stratum to form a main fracture; a temporary plugging agent is used for plugging the main fracture; pressure of the fracturing liquid is increased to 5-10 MPa, the fracturing liquid is injected again by means of the perforated hole to enable the stratum to form a larger number of secondary fractures around the main fracture. The fracture network system fracturing technology is provided for increasing the yield of an oil and gas field, natural fractures around a shaft and the artificial fractures can be distributed in a staggered mode to form an artificial fracture three-dimensional network, the swept volume of the fractured fractures in a reservoir can be maximized, and the well seepage size after fracturing is increased by folds, so that the purpose of increasing the yield and the injection amount is achieved.

Description

technical field [0001] The invention belongs to the field of oil field technology, and relates to a fracturing technology of an oil and gas well fracture network system. Background technique [0002] At present, hydraulic fracturing technology is a very effective transformation method in terms of oil and gas field stimulation measures. This technology has the characteristics of quick results and large production increase range. For stage fracturing, the types of liquid and proppant are relatively single. The artificial fracture formed after fracturing is only a single main fracture. The opening and extension of natural fractures are limited, the seepage area is limited, and the oil and gas supply capacity of the fracture system is poor. Fracturing, the traditional fracturing process has poor stimulation effect and short validity period. Therefore, it is necessary to design a fracturing process capable of large-scale and large-displacement fracture-network systems. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
Inventor 张亚胜
Owner DAQING JINGTAI PETROLEUM ENG TECH
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