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High temperature resistant gel diverting agent and manufacturing method therefor and application thereof

A high-temperature-resistant gel and steering agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of organic gels not resistant to high temperatures, short validity period, and inorganic gel technology not resistant to erosion, etc., to achieve Improve the effect of high temperature resistance and erosion resistance, strong gel strength, excellent gel strength and elastic properties

Active Publication Date: 2015-12-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the above shortcomings, the purpose of the present invention is to propose a high temperature resistant gel diverting agent and its preparation method and application, which can solve the shortcomings of the existing organogels such as low temperature resistance, short validity period and non-scourability of inorganic gel technology.

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  • High temperature resistant gel diverting agent and manufacturing method therefor and application thereof
  • High temperature resistant gel diverting agent and manufacturing method therefor and application thereof
  • High temperature resistant gel diverting agent and manufacturing method therefor and application thereof

Examples

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Embodiment 1

[0030] This embodiment provides a high-temperature-resistant gel diverting agent, which includes the following components based on 100 parts by weight of the total weight: 3 parts of acrylamide, 1 part of N-tert-butylacrylamide, 1 part of 2-acrylamide-2 Sodium methyl propane sulfonate, 1 part of sepiolite, 0.03 part of polyethyleneimine, 0.05 part of ammonium persulfate and 93.92 parts of tap water.

[0031] The high temperature resistant gel diverting agent of the present embodiment is prepared through the following steps:

[0032] Add 3 parts of acrylamide, 1 part of N-tert-butylacrylamide, 1 part of 2-acrylamido-2-methylpropanesulfonate sodium, 1 part of sepiolite, 0.03 part of polyethyleneimine, 0.05 part Ammonium persulfate and 93.92 parts of tap water were stirred for 10 minutes to dissolve completely, then put into a stainless steel aging tank, and gelled initially at 130°C and normal pressure for 30 hours to obtain a high temperature resistant gel diverting agent.

[...

Embodiment 2

[0043] This embodiment provides a high-temperature-resistant gel diverting agent, which includes the following components based on 100 parts by weight of the total weight: 4 parts of acrylamide, 2 parts of N-tert-butylacrylamide, 2 parts of 2-acrylamide-2 Sodium methyl propane sulfonate, 2 parts of sepiolite, 0.04 parts of polyethyleneimine, 0.08 parts of ammonium persulfate and 89.88 parts of tap water.

[0044] The high temperature resistant gel diverting agent of the present embodiment is prepared through the following steps:

[0045] Add 4 parts of acrylamide, 2 parts of N-tert-butylacrylamide, 2 parts of 2-acrylamido-2-methylpropanesulfonate sodium, 2 parts of sepiolite, 0.04 parts of polyethyleneimine, 0.08 parts of Ammonium persulfate and 89.88 parts of tap water were stirred for 10 minutes to dissolve completely, then put into a stainless steel aging tank, and initially gelled at 130°C and normal pressure for 26 hours to obtain a high temperature resistant gel divertin...

Embodiment 3

[0056] This embodiment provides a high-temperature-resistant gel diverting agent, which includes the following components based on 100 parts by weight of the total weight: 4 parts of acrylamide, 2 parts of N-tert-butylacrylamide, 3 parts of 2-acrylamide-2 Sodium methyl propane sulfonate, 2 parts of sepiolite, 0.05 part of polyethyleneimine, 0.10 part of ammonium persulfate and 88.85 parts of tap water.

[0057] The high temperature resistant gel diverting agent of the present embodiment is prepared through the following steps:

[0058] Add 4 parts of acrylamide, 2 parts of N-tert-butylacrylamide, 3 parts of 2-acrylamido-2-methylpropanesulfonate sodium, 2 parts of meerschaum, 0.05 parts of polyethyleneimine, 0.10 parts of Ammonium persulfate and 88.85 parts of tap water were stirred for 10 minutes to dissolve completely, then put into a stainless steel aging tank, and gelled initially at 130°C and normal pressure for 20 hours to obtain a high temperature resistant gel diverting...

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Abstract

The present invention provides a high temperature resistant gel diverting agent and a manufacturing method therefor and an application thereof. Based on a total weight of 100 parts, the high temperature resistant gel diverting agent comprises the following components in parts by weight : 3-5 parts of acrylamide, 1-3 parts of hydrolysis resistant monomer, 1-3 parts of salt resistant monomer, 1-3 parts of inorganic material, 0.03-0.06 parts of crosslinking agent, 0.05-0.15 parts of initiator, and water as the balance. According to the present invention, the high temperature resistant gel diverting agent not only has characteristics of high gel strength and adjustable gelling time, but also has a high temperature resistant capability and a flushing resistant property, so that a gel validity period of profile controlling and water plugging in a water injection oil well is prolonged, subsequently injected water is driven to an oil layer with a lower permeability, and water injection sweep efficiency and oil recovery efficiency are enhanced.

Description

technical field [0001] The invention relates to the technical field of oil field exploitation, in particular to a high temperature resistant gel diverting agent and its preparation method and application. Background technique [0002] The single-layer breakthrough of injected water caused by long-term water flooding in water flooding development reservoirs has serious interlayer contradictions and interlayer interference. Profile control and water shutoff technology is an important means to solve the inefficient and ineffective circulation of water injection in water flooding development oilfields, and improve the efficiency of water injection and ultimate recovery. At present, plugging regulators used on site mainly include inorganic plugging regulators and organic plugging regulators. The organic polymer gel plugging control agent has poor long-term thermal stability in high temperature and high salt reservoirs, the validity period is short, and the effect of the measures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512
CPCC09K8/5045C09K8/5083C09K8/512
Inventor 刘平德魏发林熊春明
Owner PETROCHINA CO LTD
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