Environmental protection type under-well formation fracturing device

An environmentally friendly and stratigraphic technology, applied in the direction of boreholes/well components, production fluids, earthwork drilling and production, etc., it can solve problems such as great differences in geological conditions, complex fracturing facilities and construction processes, pollution, etc., and achieve operational process Stable and reliable, improved formation permeability, stable and efficient operation
CN105178933AInactive Publication Date: 2015-12-23ZHONGBEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGBEI UNIV
Publication Date
2015-12-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an environmental protection type under-well formation fracturing device, belonging to the technical field of permeability improvement fracturing for horizontal wells, inclined shafts and vertical wells. The device comprises a wellhead plugging device, an under-well tugger, in-well packers, a high-pressure hose, an in-well armored cable, a high-strength cable, an operating control mechanism and a sensor assembly. The under-well tugger is operated through the operating control mechanism to drag the two in-well packers to a set position and form a set under-well fracturing formation space, then the high-pressure hose is controlled to respectively pour spacer fluid, a liquid explosive and a primary explosive into an under-well space to be fractured according to the proportion of formula, and the in-well cable is controlled for electronic ignition to carry out the high-energy high-pressure gas fracturing formation operation; through such manipulation, repetitive or non-repetitive formation fracturing operation in different formation spaces and under different formation conditions is realized. The efficient, economic and environmental-protection formation fracturing device is provided for coal bed gas / shale gas mining, the operation fracturing effect is good, fracture extension can form a wide range of fracture system, the permeability and the desorption rate of a reservoir can be increased, and the purpose of increasing production is achieved. The device is worthy of adoption and promotion.
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Description

technical field

[0001] The environmental-friendly downhole fracturing formation device disclosed by the present invention belongs to the field of anti-permeability fracturing technologies such as horizontal wells, inclined wells, and vertical wells. A new device for downhole composite fracturing formations. Background technique

[0002] Coal bed methane and shale gas are all unconventional natural gas. They are clean, high-quality energy and chemical raw materials that have emerged internationally in the past 10 to 20 years. They have great prospects for commercialization. At present, my country's total coalbed methane resources rank third in the world, and shale gas recoverable reserves rank first in the world, both of which are emerging energy industries that my country focuses on. However, affected by tectonic movements, coalbed methane reservoirs in my country usually have the characteristics of low permeability, low pressure, low gas saturation, and strong heterogeneit...

Claims

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