Oil-soluble latex blocking agent and preparation method thereof

A plugging agent and oil-soluble technology, which is applied in the field of oil-soluble emulsion plugging agent and its preparation, can solve the problems of plugging failure and slow plugging, and achieve the goal of preventing crack opening, good pressure bearing performance and ensuring stability Effect

Inactive Publication Date: 2019-05-17
青岛科凯达橡塑有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above technical problems, the embodiment of the present invention provides an oil-soluble emulsion plugging agent and its preparation method to solve the problems of slow plugging and easy plugging failure caused by oil well back-vomiting pressure in the existing cement slurry plugging agent. question

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  • Oil-soluble latex blocking agent and preparation method thereof

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Effect test

Embodiment 1

[0039] 1. This embodiment provides an oil-soluble emulsion plugging agent, which is mainly prepared from the following components in parts by mass:

[0040] 50 parts of butadiene monomer, 45 parts of styrene monomer, 15 parts of alkyl acrylate, 10 parts of glycidyl acrylate, 1.5-3 parts of sodium methacrylate hydroxypropyl sulfonate, 110 parts of deionized water, disulfide 0.2 parts of diisopropyl xanthate, 0.02 parts of antioxidant Irganox1098, 10 parts of white oil, 0.28 parts of azobicyclohexylcarbonitrile, 0.01-0.025 parts of hydroxyethylethylenediaminetriacetic acid (HEDTA), two 0.1-0.5 parts of sodium methyl disulfide carbamate.

[0041] 2. This embodiment also provides the preparation method of the above-mentioned oil-soluble emulsion plugging agent, the specific steps are as follows:

[0042] 110 grams of deionized water, 3 grams of sodium methacrylate hydroxypropylsulfonate, and 0.02 grams of hydroxyethylethylenediaminetriacetic acid HEDTA were sequentially added to ...

Embodiment 2

[0049] 1. This embodiment provides an oil-soluble emulsion plugging agent, which is mainly prepared from various components in the following parts by mass:

[0050] 35 parts of butadiene monomer, 55 parts of styrene monomer, 18 parts of alkyl acrylate, 8 parts of glycidyl acrylate, 2 parts of octylphenol polyoxyethylene ether, 115 parts of deionized water, n-dodecyl 0.25 part of mercaptan, 0.03 part of antioxidant Irganox1098, 10 parts of white oil, 0.3 part of azobicyclohexylcarbonitrile, 0.015 part of hydroxyethylethylenediaminetriacetic acid (HEDTA), 0.3 part of p-tert-butylcatechol.

[0051] 2. This embodiment also provides the preparation method of the above-mentioned oil-soluble emulsion plugging agent, the specific steps are as follows:

[0052] 115 grams of deionized water, 2 grams of octylphenol polyoxyethylene ether, and 0.015 grams of HEDTA were sequentially added to a 1000 mL four-neck flask, and stirred at 240 rpm to form a solution. Remove the air under 0.09MPa ...

Embodiment 3

[0059] 1. This embodiment provides an oil-soluble emulsion plugging agent, which is mainly prepared from the following components in parts by mass:

[0060] 40 parts of butadiene monomer, 50 parts of styrene monomer, 25 parts of alkyl acrylate, 6.25 parts of glycidyl acrylate, 2.5 parts of sodium methacrylate hydroxypropyl sulfonate, 105 parts of deionized water, tert-dodecane 0.3 parts of base mercaptan, 0.025 parts of antioxidant Irganox1098, 7.5 parts of white oil, 0.4 parts of initiator, 0.02 parts of dihydroxyethylglycine, and 0.375 parts of p-tert-butylcatechol.

[0061] 2. This embodiment also provides the preparation method of the above-mentioned oil-soluble emulsion plugging agent, the specific steps are as follows:

[0062] 420 grams of deionized water, 10 grams of sodium methacrylate hydroxypropyl sulfonate, and 0.08 grams of dihydroxyethylglycine were sequentially added to a 4000 mL four-necked flask, and stirred at 350 rpm to form a solution. Remove the air under...

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Abstract

The invention discloses an oil-soluble latex blocking agent and a preparation method thereof. The oil-soluble latex blocking agent is prepared from the following components in parts by mass: 30-60 parts of monomer butadiene, 35-60 parts of monomer styrene, 15-35 parts of alkyl acrylate, 3-15 parts of glycidyl acrylate, 1.5-3 parts of an emulsifying agent, 100-120 parts of deionized water, 0.16-0.35 part of a molecular weight modifier, 0.02-0.04 part of an antioxidant, 5-12 parts of extending oil, 0.1-0.4 part of an initiating agent, 0.01-0.025 part of a chelating agent and 0.1-0.5 part of a chain terminator. The oil-soluble rubber latex blocking agent has suitable solubility and mobility, a blocking layer can be rapidly formed, and shortening of a construction period is facilitated; and meanwhile, the oil-soluble rubber latex blocking agent has good resident and pressure bearing capacity, the blocking layer formed by the blocking agent has a good blocking effect towards a micro-crack,the pressure bearing property is good, the crack is prevented from opening, and the stability of a well wall of an oil well is ensured.

Description

technical field [0001] The invention relates to the field of oil well production plugging, in particular to an oil-soluble emulsion plugging agent and a preparation method thereof. Background technique [0002] In the process of mineral exploitation, the plugging construction of oil wells is very difficult. At present, cement slurry is generally used to block oil wells. However, the traditional cement slurry plugging agent has high water loss and high fluidity. In the actual construction process, the cement slurry cannot be quickly condensed into a certain strength plugging layer, which will not only affect the construction period, but also easily due to the pressure or pressure of the oil well. Gas channeling causes plugging failure, and after the plugging is completed, when the plugging column is lifted, suction pressure will be generated in the well, causing the cement slurry entering the formation to flow back into the wellbore, resulting in failure to plug the oil well....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C08F236/10C08F212/08C08F220/10C08F220/32C08F220/38
Inventor 张哲郑君陈秀秀耿立涛
Owner 青岛科凯达橡塑有限公司
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