Microemulsion type high-temperature-resistant blockage remover for sulfur-containing gas well, and preparation method thereof

A plug-removing agent and high-temperature-resistant technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that the temperature resistance does not exceed 100°C, and achieve high temperature resistance, good thermal stability, and broad The effect of applying the foreground

Active Publication Date: 2017-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature resistance of microemulsion plugging removers,

Method used

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  • Microemulsion type high-temperature-resistant blockage remover for sulfur-containing gas well, and preparation method thereof
  • Microemulsion type high-temperature-resistant blockage remover for sulfur-containing gas well, and preparation method thereof
  • Microemulsion type high-temperature-resistant blockage remover for sulfur-containing gas well, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0044] The preparation method of the present invention comprises the following sequential steps:

[0045] Step 1. Prepare constant temperature water bath equipment and heat up to 63°C to 64°C;

[0046] Each raw material is taken by the formula quantity of embodiment 1;

[0047] Step 2. Put hydrochloric acid, clear water, and potassium hydrogen phthalate into an acid-resistant container (such as a glass container, etc.), then place the acid-resistant container in a water bath, and stir evenly after each raw material in the acid-resistant container is completely dissolved;

[0048] Step 3. Add cetyltrimethylammonium chloride in the acid-resistant container; stir evenly after dissolving at the temperature of the water bath;

[0049] Step 4. The acid-resistant container of step 3 is taken out from the water bath equipment;

[0050] Add trichlorethylene (or solvent naphtha) and mutual solvent into an acid-resistant container, and stir for 10 minutes with a stirrer at a speed of 900...

Embodiment 8

[0055] The preparation method of the present invention comprises the following sequential steps:

[0056] Step 1. Prepare constant temperature water bath equipment and heat up to 68°C to 70°C;

[0057] Each raw material is taken by the formula quantity of embodiment 3;

[0058] Step 2. Put hydrochloric acid, clear water, and potassium hydrogen phthalate into an acid-resistant container, then place the acid-resistant container in a water bath, and stir evenly after the raw materials in the acid-resistant container are completely dissolved;

[0059] Step 3. Add cetyltrimethylammonium chloride in the acid-resistant container; stir evenly after dissolving at the temperature of the water bath;

[0060] Step 4. The acid-resistant container of step 3 is taken out from the water bath equipment;

[0061] Add trichlorethylene (or solvent naphtha) and mutual solvent into an acid-resistant container, and stir for 10 minutes with a stirrer at a speed of 1000 rpm;

[0062] Step 5. Add n-...

Embodiment 9

[0066] The preparation method of the present invention comprises the following sequential steps:

[0067] Step 1. Prepare constant temperature water bath equipment and heat up to 60°C to 61°C;

[0068] Each raw material is taken by the formula quantity of embodiment 4;

[0069] Step 2. Put hydrochloric acid, clear water, and potassium hydrogen phthalate into an acid-resistant container, then place the acid-resistant container in a water bath, and stir evenly after the raw materials in the acid-resistant container are completely dissolved;

[0070] Step 3. Add cetyltrimethylammonium chloride in the acid-resistant container; stir evenly after dissolving at the temperature of the water bath;

[0071] Step 4. The acid-resistant container of step 3 is taken out from the water bath equipment;

[0072] Add trichlorethylene (or solvent naphtha) and mutual solvent in the acid-resistant container, and stir for 10 minutes with a stirrer at a speed of 1200 rpm;

[0073] Step 5. Add n-o...

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Abstract

The invention discloses a microemulsion type high-temperature-resistant blockage remover for a sulfur-containing gas well, and a preparation method thereof. The blockage remover can resist high temperature of 150 DEG C, and comprises the following raw materials in parts by weight: 30 to 50 parts of trichloro ethylene/solvent oil, 30 to 50 parts of hydrochloric acid, 5 to 10 parts of hexadecyl trimethyl ammonium chloride, 0.2 to 0.4 part of n-octyl alcohol, 3 to 5 parts of a mutual solvent, 5 to 8 parts of a sulfur dissolving agent, 0.1 to 0.3 part of potassium hydrogen phthalate, 0.1 to 0.3 part of potassium hydrogen phthalate microcapsules, 0.3 to 0.5 part of ninol, 0.5 to 1.0 part of ammonium bifluoride, 0.2 to 0.3 part of ammonium persulfate and 5 to 10 parts of clear water. The microemulsion type high-temperature-resistant blockage remover for the sulfur-containing gas well has the characteristics of high temperature resistance, high heat stability, sulfur dissolving property, rapid dissolving speed of a sulfur-containing composite blocking substance and the like, can be widely applied to blockage construction of the high-temperature sulfur-containing gas well, and has a wide application prospect.

Description

technical field [0001] The invention relates to a plug-removing agent used in the development of oil and gas wells, in particular to a microemulsion high-temperature-resistant plug-removing agent for sulfur-containing gas wells, and a preparation method of the plug-removing agent. Background technique [0002] In the production process of sulfur-containing gas wells, with the prolongation of production time, polymers in the well-entry working fluid, cracking residues of corrosion inhibitors, corrosion products of pipe strings, gas well condensate waxes and asphalt colloids, sulfur deposits, inorganic scales, etc. Under the combined action of substances such as sulphide, cuttings, and even metal tool residues, the wellbore of a sulfur-bearing gas well will be blocked organically or inorganically, which will cause the gas well to fail to produce normally, and even be forced to shut down the well. The sulfur gas field has been normally exploited for less than three years, and w...

Claims

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Application Information

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IPC IPC(8): C09K8/532C09K8/528C09K8/524
CPCC09K8/524C09K8/528C09K8/532
Inventor 潘宝风兰林李尚贵杨兵周建伟李洪波黄贵存刘多容王文耀
Owner CHINA PETROLEUM & CHEM CORP
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