Underground multi-stage intelligent high pressure gas pulse formation fracturing device and method thereof

A high-pressure gas, high-temperature and high-pressure gas technology, applied in the production of fluids, earth-moving drilling, wellbore/well components, etc., can solve the problem of rapid decay, difficult to change re-fracturing stimulation, and the permeability and porosity of the gas layer have not been improved. And other issues

Active Publication Date: 2014-08-13
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to generate fractures in gas layers far from the main fractures, the permeability and porosity of the gas layers have not been improved, and the coalbed methane is difficult to desorb. Therefore, some wells decay quickly after hydraulic fracturing, and repeated fracturing is also difficult. Change

Method used

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  • Underground multi-stage intelligent high pressure gas pulse formation fracturing device and method thereof
  • Underground multi-stage intelligent high pressure gas pulse formation fracturing device and method thereof
  • Underground multi-stage intelligent high pressure gas pulse formation fracturing device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1. Downhole multi-stage intelligent high-pressure gas pulse fracturing device

[0035] The specific structure of this downhole multi-stage intelligent high-pressure gas pulse fracturing formation device in this example is as follows: Figure 1 to Figure 10 Jointly shown, figure 1 Shown is the structure diagram of the downhole intelligent high-pressure gas pulse fracturing formation device, as shown in figure 1 Each stage shown in the figure includes: 1 is the intelligent pressure coding detonator, 2 is the ignition detonator, 3 is the detonating cord, 4 is the energetic material, 5 is the outer cylinder of the fracturing charge mechanism, and 6 is the pressure-bearing membrane rupture component , 7 is a gas mixing screen assembly, 8 is a high-pressure gas, 9 is a high-pressure gas mechanical outer cylinder, 10 is a gas injection and leakage assembly, 11 is a pressure relief screen cylinder, 12 is a pressure relief blocking piece, 13 is a lower plug, and the ...

Embodiment 2

[0036] Embodiment 2. Downhole multi-stage intelligent high-pressure gas pulse fracturing device

[0037] The specific structure of the downhole multi-stage intelligent high-pressure gas pulse fracturing device in this example can be used Figure 1 to Figure 10 etc. have jointly shown that the difference between the downhole multi-stage intelligent high-pressure gas pulse fracturing device of this example and the downhole multi-stage intelligent high-pressure gas pulse fracturing device of Embodiment 1 is: the downhole multi-stage intelligent high-pressure gas pulse fracturing device of this example The multi-stage N of the formation fracturing device is selected as 6, or 5, or 4. The rest of the downhole multi-stage intelligent high-pressure gas pulse fracturing formation device of this example is the same as that described in Embodiment 1 and will not be repeated. .

Embodiment 3

[0038] Embodiment 3. Downhole multi-stage intelligent high-pressure gas pulse fracturing device

[0039] The specific structure of the downhole multi-stage intelligent high-pressure gas pulse fracturing device in this example can be used Figure 1 to Figure 10 etc. have shown that the difference between the downhole multi-stage intelligent high-pressure gas pulse fracturing formation device in this example and the downhole multi-stage intelligent high-pressure gas pulse fracturing formation device in Embodiment 1 and Embodiment 2 is as follows: the downhole multi-stage intelligent The multi-stage N of the high-pressure gas pulse fracturing formation device is selected as 3, or 2, or 1. The rest of the downhole multi-stage intelligent high-pressure gas pulse fracturing formation device of this example is the same as that described in Embodiment 1 and Embodiment 2, and will not be repeated.

[0040] Non-limiting examples of the downhole multi-stage intelligent high-pressure gas...

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Abstract

The invention discloses an underground multi-stage intelligent high pressure gas pulse formation fracturing device and a method thereof, belongs to the technical field of fracturing completion of oil and gas wells, and particularly relates to two technical sachems of the device and the method. The method is used for fracturing the underground layer by the underground multi-stage intelligent high pressure gas pulse formation fracturing device. The device is controlled by each stage of intelligent pressure encoding detonator to gradually detonate by stages at proper time to generate a large amount of high pressure gas according to the set working mode, the dynamic high pressure pulse pressure is formed in the well or holes of a formation, the formation is fractured to form a plurality of cracks, and the permeability of fluid in the formation is increased, so the oil and gas are easily produced. The device and the method have the advantages that the cyclic multiple pressure pulses which are controlled at proper pressure can be generated, so the formation can generate the compression-expansion-compression alternating 'resonance', the cracks are promoted to effectively extend, and a new fracturing network is formed, so the permeability of the formation is improved; the pollution to the formation and environment in the fracturing process is avoided; the method is suitable for the water-sensitive and acid-sensitive formation; the construction cycle is short, the cost is low, the equipment is simple and convenient, and the limitation by terrain and water sources is avoided.

Description

technical field [0001] The downhole multi-stage intelligent high-pressure gas pulse fracturing formation device and its method disclosed by the present invention belong to the field of oil and gas well fracturing and completion technology, and specifically relate to a production stimulation technology for downhole formation fracturing development, especially coalbed methane underground multiple There are two technical solutions: a multi-level intelligent high-pressure gas pulse fracturing formation device and an underground multi-level intelligent high-pressure gas pulse fracturing method. Background technique [0002] Coalbed methane is unconventional natural gas that is self-generated and self-storage in coal seams. my country is rich in coalbed methane resources, ranking third in the world. Coalbed methane is not only a new type of clean energy, but its development is also conducive to eliminating hidden dangers of coal mine gas disasters and protecting the atmospheric en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/263
Inventor 马铁华崔春生裴东兴范锦彪祖静李新娥姚舜才张红艳梁志剑陈昌鑫肖文聪徐鹏靳鸿沈大伟张瑜
Owner ZHONGBEI UNIV
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