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Blasting and fracturing stimulation method for low-permeability oil and gas layers in oil production wells

A low-permeability, oil and gas layer technology, applied in the development of fluids, earthwork drilling, wellbore/well components, etc., can solve the problems of increasing the porosity and permeability of low-permeability oil and gas layers, achieve outstanding economic benefits, and speed up drilling Great effect of speed and production increase

Inactive Publication Date: 2011-12-28
杨瑞召 +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method of blasting and fracturing stimulation of low-permeability oil and gas layers in oil production wells to solve the technical problem of greatly increasing the porosity and permeability of low-permeability oil and gas layers

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  • Blasting and fracturing stimulation method for low-permeability oil and gas layers in oil production wells
  • Blasting and fracturing stimulation method for low-permeability oil and gas layers in oil production wells
  • Blasting and fracturing stimulation method for low-permeability oil and gas layers in oil production wells

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Embodiment Construction

[0022] Basic technical principle of the present invention and generation stress wave effect are described in detail as follows:

[0023] see figure 1 , the laboratory experiment proves that after the explosive column 2 exploded in the formation, it can produce two kinds of stress effects on the formation. One is that the high-pressure and high-temperature gas produced by the explosion can cause a huge "shock wave" to the formation. The stress decreases with increasing distance, with a peak value of 11 MPa at 3 meters. The second is to generate stress wave action on the fractures and dissolved pores in the formation: stress concentration is formed at the ends of natural fractures and structures in the formation, and new cracks and fractures are formed by expanding the fracture structure, changing and connecting all directions of the formation cracks and dissolved pores to increase the overall seepage area of ​​the low-permeability oil and gas layer 4, thereby achieving the pu...

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Abstract

The invention discloses a method for blasting and fracturing production stimulation of low-permeability oil and gas layers in oil production wells. The specific steps are as follows: firstly, open a window and sidetrack a small wellbore in a vertical well that has been drilled, the drilling direction is horizontal, and the window is opened for sidetracking. Select low-permeability oil and gas reservoirs; secondly, use soft tubing to transport multiple groups of explosive columns to the horizontal slimhole section to complete the blasting; thirdly, carry out oil and gas production after screen oil testing for production. The invention can solve the technical problem of greatly increasing the porosity and permeability of low-permeability oil and gas layers.

Description

technical field [0001] The invention relates to an oil exploitation technology, in particular to a technical method for increasing the production capacity of oil and gas reservoirs. Background technique [0002] At present, in the development of oil and gas fields in my country, the conventional development output of low-permeability oil and gas layers generally cannot reach the index of industrial oil and gas flow. In order to improve the productivity of these oil and gas reservoirs, it is necessary to solve the connection of natural fractures inside the reservoir, greatly increase the porosity and permeability of the reservoir, and increase the diversion area of ​​liquid and gas. [0003] In order to solve this problem, it is necessary to find a technical method that can effectively change the porosity and permeability of low-permeability oil and gas layers, so as to increase the production capacity. Contents of the invention [0004] The purpose of the present inventio...

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Application Information

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IPC IPC(8): E21B43/263
Inventor 杨瑞召侯建国刘俊峰
Owner 杨瑞召
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