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Pulse fracturing sand injector for horizontal wells

A pulse pressure, horizontal well technology, used in directional drilling, wellbore/well components, and production fluids, etc., can solve the problems that the fracturing bomb structure is not suitable for the horizontal well body structure, and the fracture is not supported by sand. The effect of increasing production is obvious, prolonging the time of increasing production, and the effect of safe and reliable use

Active Publication Date: 2010-01-06
NORTH SCHLUMBERGER OILFIELD TECH XIAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, there are deficiencies in the existing gas fracturing technology or products at home and abroad: either because the structure and process design of fracturing bombs are not suitable for the special well structure of horizontal wells, or the effect of sand support on fractures has not been realized

Method used

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  • Pulse fracturing sand injector for horizontal wells
  • Pulse fracturing sand injector for horizontal wells
  • Pulse fracturing sand injector for horizontal wells

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Embodiment Construction

[0019] See attached figure 1 , the horizontal well pulse fracturing sanding device of the present invention is formed by sequentially connecting an igniter 1, a fracturing gun assembly 2, a sanding gun assembly 3, an interlayer gun assembly 4, an intermediate joint 5 and a gun tail 6; The cracking gun assembly 2, the sanding gun assembly 3, the interlayer gun assembly 4 and the intermediate joint 5 are combined into gun bodies of different lengths as required, the fracturing gun assembly 2 is connected to the igniter 1 through the intermediate joint 5, and the gun tail 6 is passed through the intermediate joint 5 is connected with the interlayer gun assembly 4 to form pulse fracturing sand adding devices of different lengths.

[0020] The fracturing gun assembly 2, the sanding gun assembly 3 and the interlayer gun assembly 4 all include a screen tube 23 with the same shape and diameter, and there are evenly distributed through holes on the screen tube 23; the through holes are...

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Abstract

The invention discloses a pulse fracturing sand injector for horizontal wells, which is formed by connecting a fracturing gun component, a sand-injecting gun component and an interlayer gun component via intermediate joints, wherein, the fracturing gun component is loaded with fracturing gunpowder with various burning speeds; the interlayer gun component is applied to the interlay where oil gas is not produced and achieves the effect of igniting; the sand-injecting gun component is internally loaded with a sand collecting cylinder and sand-expelling gunpowder and used for conveying propping agent to the formation fracture, thereby forming the fracturing sand injector with the length ranging from dozens of meters to hundreds of meters for horizontal wells by proper combining the components according to the distribution of the production pay and the interlayer. By introducing the propping agent to the high-energy gas fracturing process, the fracturing sand injector can improve the stability of fracture and extend the stimulation time, and the fracturing sand injector has the characteristics of low cost, obvious stimulation effect, simple process and safe and reliable application. The invention is applicable to horizontal wells with different completion manners, vertical wells or inclined wells, such as cased wells, sieved wells or uncased wells.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to a gas fracturing device, in particular to a horizontal well pulse fracturing sand adding device. Background technique [0002] At present, the stimulation measures for low-permeability and low-porosity horizontal wells are mainly to implement hydraulic fracturing and acidizing, but hydraulic fracturing and acidizing require many producing equipment, long operation period, high cost, and easy to cause secondary pollution to the formation, which can only form One to several double-wing fractures are difficult to open due to low pressure in highly dense formations. Oil and gas reservoirs such as water-sensitive formations, strong hydrophilic formations, tight sandstone low-permeability reservoirs, and horizontal wells completed with screens are also not suitable for hydraulic fracturing. Acidification requires a large amount of acid liquid, which is expensive and cause...

Claims

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Application Information

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IPC IPC(8): E21B43/263E21B7/04F42D3/00F42D1/04
Inventor 汪长栓姚元文冯国富
Owner NORTH SCHLUMBERGER OILFIELD TECH XIAN
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