A pore opening device and method for fouling of ASP flooding wells

A ternary composite and channel technology, which is used in earth-moving drilling, wellbore/well components, cleaning tools, etc., can solve the problems of decreasing formation permeability and affecting the productivity of oil and gas wells, so as to improve productivity, improve permeability and conductivity. flow capacity, the effect of increasing porosity

Active Publication Date: 2022-05-17
DAQING HUAHANBANG GASOLINEEUM EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Formation permeability continues to decrease, seriously affecting the productivity of oil and gas wells

Method used

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  • A pore opening device and method for fouling of ASP flooding wells
  • A pore opening device and method for fouling of ASP flooding wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] See attached figure 1 , the embodiment of the present invention discloses a pore opening device for fouling of ASP flooding wells, including:

[0031] The main body of the expansion device, the main body of the expansion device includes a connecting pipe 1; and an upper end barrier 2, an upper end damper 3, an igniter, an incendiary bomb 4, a negative pressure device 5, The lower end damper 6 and the tail end centralizer 7, the tail end centralizer 7 is fixedly connected with the lower end of the connecting pipe 1; and

[0032] The connecting piece is connected with the main body of the expansion device for suspending the main body of the expansion device; the connecting piece is also connected with the pilot for starting the pilot; the pilot is for igniting the incendiary bomb 4 .

[0033] Wherein, the incendiary bomb 4 is composed of multi-components such as aerospace propellants. In this embodiment, a double-base propellant is used, that is, a homogeneous mixture of...

Embodiment 2

[0039] See attached figure 2 , the embodiment of the present invention discloses a pore opening device for fouling of ASP flooding wells, including:

[0040] The main body of the expansion device, the main body of the expansion device includes a connecting pipe 1; and an upper end barrier 2, an upper end damper 3, an igniter, an incendiary bomb 4, a negative pressure device 5, The lower end damper 6 and the tail end centralizer 7, the tail end centralizer 7 is fixedly connected with the lower end of the connecting pipe 1; and

[0041] The connecting piece is connected with the main body of the expansion device for suspending the main body of the expansion device; the connecting piece is also connected with the igniter for starting the igniter;

[0042]Wherein, the incendiary bomb 4 is composed of multi-components such as aerospace propellants. In this embodiment, a double-base propellant is used, that is, a homogeneous mixture of nitrocellulose and nitroglycerin, and a shell...

Embodiment 3

[0048] The present invention also discloses a pore opening method aimed at scaling of ASP flooding wells, the pore expanding method adopts any one of the pore channel targeting at scaling of ASP flooding wells in Embodiment 1 or Example 2 The expansion device specifically includes the following steps:

[0049] Step 1: Evaluate the clogging situation of the ASP flooding well, judge the clogging position, set the target layer, and expand the pores of the ASP flooding well when the clogging situation reaches the level that needs to be expanded;

[0050] Step 2: Set the incendiary bomb according to the evaluation situation, and select the corresponding dose of aerospace propellant to set the incendiary bomb according to the severity of the blockage. The detonation range of the incendiary bomb and the volume expansion multiple can be calculated from the weight of the aerospace propellant , in this embodiment, the incendiary bomb uses a double-base propellant, that is, a homogeneous...

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Abstract

The invention discloses a channel widening device for fouling of three-element compound oil flooding wells, which belongs to the technical field of oil production engineering and includes a connecting pipe; and an upper-end blocker, an upper-end damper, igniter, incendiary bomb, negative pressure device, lower end damper and tail centralizer, the tail centralizer is fixedly connected with the lower end of the connecting pipe; The main body of the communication device; the connecting piece is also connected with the igniter for starting the igniter; the igniter is used for igniting the incendiary bomb. The high-temperature and high-pressure impact flow can be released in an orderly manner when the incendiary bomb is burned, and the scales in the percolation channels of the ASP flooding well can be hot-melted and high-pressure impacted, and then quickly broken and peeled off. At the same time, the negative pressure characteristics of the negative pressure device are used. A high and low pressure difference is formed between the wellbore casing and the negative pressure device to realize air convection, and then achieve the purpose of backwashing the broken and stripped scale in the seepage channel.

Description

technical field [0001] The invention relates to the technical field of oil production engineering, and more specifically relates to a pore opening device and method for fouling of three-element compound oil flooding wells. Background technique [0002] At present, with the continuous deepening of oilfield development and the need for sustained and stable production, the oilfield development method has also been adjusted accordingly. ASP flooding is a new tertiary oil recovery technology developed in the 1980s. The application of this technology improves the oil displacement efficiency and oil recovery rate; making ASP flooding one of the main development technologies for sustained and stable production in oilfields. ASP flooding refers to the ASP system formulated with polymer, surfactant and alkali. The main function of the polymer in the ternary medium is to increase the viscosity of the system, and can effectively improve the mobility ratio of oil and water, and effectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/00
CPCE21B37/00
Inventor 马新民陈建华石莹王新生张磊雷跃生吴迪
Owner DAQING HUAHANBANG GASOLINEEUM EQUIP MFG
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