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A kind of oil field microcapsule non-acid autogenous heat blocking agent and preparation method thereof

A technology of microcapsules and plug-removing agent, which is applied in the field of microcapsule non-acid autogenous heat-removing plug-removing agent and its preparation field in oil field, can solve problems such as hidden safety hazards, reaction heat release, etc., so as to increase pressure, increase crude oil production, social benefits and Significant environmental benefits

Active Publication Date: 2022-08-09
天津克睿特维科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, in the process of transportation and storage of reactants, if the operation or storage is improper, there will be a risk of exothermic reaction, and there will be certain safety hazards

Method used

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  • A kind of oil field microcapsule non-acid autogenous heat blocking agent and preparation method thereof
  • A kind of oil field microcapsule non-acid autogenous heat blocking agent and preparation method thereof
  • A kind of oil field microcapsule non-acid autogenous heat blocking agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] The preparation method of the above-mentioned oil field microcapsule non-acid autogenous heat blocking agent is specifically:

[0048] The water-soluble microcapsule blocking agent KR-100A and the water-soluble microcapsule blocking agent KR-100B are uniformly mixed according to the mass ratio of 0.9-2.1:1 to obtain the oil field microcapsule non-acid autogenous heat blocking agent.

[0049] The use method of the above-mentioned oil field microcapsule non-acid autogenous heat blocking agent, the concrete steps are:

[0050] Use clean water to test the pressure of the extrusion process and the Christmas tree, without puncturing or leaking, and then carry out extrusion construction after passing the test;

[0051]Close the blowout preventer, test the perforation section, and determine the water absorption of the oil layer;

[0052] Disperse the mixture of water-soluble microcapsule deblocking agent KR-100A and water-soluble microcapsule deblocking agent KR-100B in an aqu...

specific Embodiment

[0060] Preparation of water-soluble microcapsule deblocking agent KR-100A: add 300 parts of capsule core materials ammonium chloride and 100 parts of potassium chloride to 1000 parts of water to dissolve to saturation, filter the saturated aqueous solution into a stainless steel reactor, add sulfuric acid Adjust the pH to 2, heat the reaction kettle to 50°C, add 200 parts of polyvinyl alcohol with a degree of polymerization of 3000 and a degree of alcoholysis of 80mol%, stir evenly, add 40 parts of dimethyl sulfoxide and 10 parts of solid paraffin, and place it in a high-speed mixer 1-0. 9mm,The particle size of the agent is 0. 1-0. 9 mm , the release rate is more than 60%, the effective content can reach 39.23%, and the embedding rate is 86.77%.

[0061]

[0062] Preparation of water-soluble microcapsule deblocking agent KR-100B: add 500 parts of sodium nitrite, 100 parts of sodium nitrate and 50 parts of EDTA-2Na salt to 1000 parts of water, the core materials of the caps...

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Abstract

The invention relates to an oil field microcapsule non-acid self-generated heat blocking agent and a preparation method thereof. The thermal blocking agent comprises a water-soluble microcapsule blocking agent KR-100A and a water-soluble microcapsule blocking agent KR-100B. The mass ratio of the microcapsule blocking agent KR-100A and the water-soluble microcapsule blocking agent KR-100B is: 0.9-2.1:1; the water-soluble microcapsule blocking agent KR-100A is composed of ammonium chloride, potassium chloride, Solid paraffin, polyvinyl alcohol and dimethyl sulfoxide; be made of. The present invention ensures that the content of the capsule core breaks through the capsule wall under appropriate conditions, reacts, releases heat, generates gas and cooperates with other auxiliary agents outside the capsule wall under the trigger of an external catalyst to clean and unblock.

Description

technical field [0001] The invention relates to the technical field of oil well blockage cleaning, in particular to an oil field microcapsule non-acid autogenous heat blockage removing agent and a preparation method thereof. Background technique [0002] At present, the main reasons for oil well blockage are as follows: [0003] 1. Formation damage caused by organic matter deposition: [0004] Emulsification blockage caused by the interaction of additives used in oil well operations with oil and water; [0005] Changes in temperature and pressure during production and transportation lead to the precipitation of wax, colloid, and asphalt in crude oil; [0006] Natural gas, CO 2 After the gaseous substance overflows, the viscosity of the crude oil increases, causing blockage. [0007] 2. Inorganic scale causes near-well blockage of oil wells: [0008] The change of temperature and pressure leads to the precipitation of produced water and salt; [0009] Incompatibility be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/536C09K8/524C09K8/528
CPCC09K8/536C09K8/524C09K8/528Y02P90/70
Inventor 高建明杨文超史云梅孙波
Owner 天津克睿特维科技发展有限公司
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