Buried sand high energy gas stress cracking method

A high-energy gas fracturing, oil and gas technology, applied in the development of fluids, earthwork drilling, wellbore/well components, etc., can solve problems such as rapid energy loss, achieve effective fracturing effect, improve fracturing effect, and simplify complexity. Effect

Active Publication Date: 2013-05-15
刘玉明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of rapid energy loss during high-energy gas fracturing. In order to improve the energy utilization effect of gas fracturing, a sand-bu

Method used

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  • Buried sand high energy gas stress cracking method
  • Buried sand high energy gas stress cracking method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1: Reference to the basic method of application of the present invention figure 1 Pack the upper and lower layers of the fracturing area (destination layer 3), and place the high-energy gas fracturing device 2 in the lower area of ​​the filling cover layer 4 to initiate fracturing. The above basic method can be applied in layers, that is, when there is a thin barrier for operation, from bottom to top, bottom sand layer 1, high-energy gas fracturing device 2, interval filling cover layer 4, high-energy gas fracturing The device 2, the filling cover layer 4, etc. are arranged in layers. After the upper layer is detonated and cracked, the casing is pressurized to conduct the fracturing step by step. After fracturing, sand washing operations are required, and the fracturing device is stepped out to complete high-energy gas fracturing.

Example Embodiment

[0020] Example 2: Follow the basic method of Example 1 see figure 1 When applied to single-layer fracturing, the steps are as follows: 1. Before high-energy gas fracturing construction, sand filling should be carried out to establish bottom hole sand layer 1 to near the destination layer 3. The height of the sand surface should be adjusted to no more than the target layer. 2 meters, and lower the liquid level as much as possible. 2. During fracturing construction, use a cable and a separate magnetic locator to detect the bottom sand surface, adjust the height of the sand surface, and increase the height of the sand surface. You can use the above filling 6 from the wellhead to make the height of the sand surface meet the requirements. After that, the magnetic positioner is removed to lower the fracturing device 2 for generating high-energy gas to the destination layer 3. The high-energy gas fracturing device 2 should be configured according to the characteristics of this process...

Example Embodiment

[0021] Embodiment 3: It is basically the same as Embodiment 3, except that the high-energy gas fracturing device 2 can be replaced by a high-energy composite perforating device. Although this reduces the number of processes, the operation risk increases. In addition, the construction of using high-energy gas as a power source to reform the ground can adopt the method described in the present invention.

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Abstract

The invention discloses a buried sand high energy gas stress cracking method which mainly includes the steps of filling sand into the bottom, arranging a high energy gas stress cracking device, constructing a covering layer, detonating, cracking in a stress mode, and removing fillings. According to the method, the filling covering layer is filled into the upper portion well segment of the stress cracking device so that fast effusion of high energy gas can be limited, maintaining time of a high-temperature and high-pressure state of the high energy gas inside a well can be relatively prolonged under the common effect of inertia resistance of the filled fillings and cohesive force and frictional force between the high energy gas and the well wall, and therefore promotion of stress cracking effect is benefited. The method is free from constraint of equipment conditions and easy to implement, can block a large amount of gas energy, is reliable in effect of blocking gas, and enables application range of high energy gas stress cracking to be wide, and stress cracking effect to be obvious.

Description

technical field [0001] The invention relates to the field of increasing production of oil and gas fields, in particular to a sand-buried high-energy gas fracturing method in the operation of oil and gas wells. Background technique [0002] With the production of oil and gas wells, the clogging of oil flow channels is becoming more and more serious, and the seepage resistance is increasing, which leads to the continuous decline of oil well production or water injection volume of water injection wells. Only various production stimulation measures can be used to solve the clogging problem. High-energy gas fracturing technology It is one of the efficient plugging removal measures for oil and water wells. High-energy gas fracturing is to use the high-energy gas produced by the deflagration of high-energy agents at the bottom of the well to relieve blockages, increase the opening degree of existing fractures, improve the conductivity of the near-wellbore area, and achieve the goal...

Claims

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Application Information

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IPC IPC(8): E21B43/26
Inventor 不公告发明人
Owner 刘玉明
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