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Preparation method of acid liquid system

An acid solution and system technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor acid fracturing effect, inability to meet deep penetration, poor temperature resistance, etc.

Inactive Publication Date: 2020-05-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The acid solution in the prior art either has short acid-etched fractures, limited access to the reservoir, and poor effect of acid fracturing; or has poor temperature resistance and high friction, which cannot meet the requirements of deep penetration under high-temperature deep well acid fracturing. transparent purpose

Method used

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  • Preparation method of acid liquid system
  • Preparation method of acid liquid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] 1) Preparation of emulsified acid-acid phase: get 97.0 parts by mass concentration of 15wt% hydrochloric acid aqueous solution, at a stirring speed of 500r / min, add 1.0 parts by mass of iron ion stabilizer ethylenediaminetetraacetic acid ( Commercially available) and 2.0 parts by mass of 1-aminoethyl-2-pentadecyl imidazoline quaternary ammonium corrosion inhibitor, then, stirred for 1 hour at a stirring speed of 500r / min;

[0116] 2) Preparation of emulsified acid oil phase: 2.0 parts by mass of dipolyhydroxystearate and 0.5 part by mass of hexadecylamine were heated to 50°C and dissolved in 97.5 parts by mass of diesel oil, and stirred evenly at a stirring speed of 500 r / min. Cool to natural ambient temperature;

[0117] 3) Preparation of emulsified acid: the volume ratio of the acid phase and the oil phase is 75:25, and the acid phase is slowly added dropwise to the oil phase at a rate of 80 drops / min at a stirring speed of 1500r / min, and the Continue to stir 20min u...

Embodiment 2

[0121] 1) Preparation of emulsified acid-acid phase: get 96.5 parts by mass concentration of 15wt% hydrochloric acid aqueous solution, add 1.2 parts by mass of iron ion stabilizer citric acid (commercially available) and 2.3 parts by mass of 2-methylquinoline benzyl quaternary ammonium salt corrosion inhibitor (commercially available), then stirred for 0.5 hour at a stirring speed of 1500r / min;

[0122] 2) Preparation of emulsified acid oil phase: 1.5 parts by mass of sorbitan sesquioleate and 0.5 parts by mass of polyoxyethylene octylphenol ether-10 were heated to 40°C and dissolved in 98 parts by mass of white oil. Stir evenly at a stirring speed of min, and cool to natural ambient temperature;

[0123] 3) Preparation of emulsified acid: the volume ratio of the acid phase and the oil phase is 65:35, and the acid phase is slowly added dropwise to the oil phase at a rate of 60 drops / min under the condition of a stirring speed of 2000 r / min, and the Continue stirring for 15min...

Embodiment 3

[0127] 1) Preparation of emulsified acid phase: get 96.0 parts by mass concentration of 20wt% hydrochloric acid aqueous solution, add 1.5 parts by mass of iron ion stabilizer (acetic acid and citric acid with 1 : 1 mass ratio mixed mixture) and 2.5 mass parts formaldehyde-p-phenylenediamine-acetophenone corrosion inhibitor (commercially available), then, stirred 2 hours at 1000r / min stirring speed;

[0128] 2) Preparation of emulsified acid oil phase: 2.0 parts by mass of sorbitan fatty acid ester and 2 parts by mass of polyoxyethylene octylphenol ether-10 were heated to 60°C and dissolved in 96 parts by mass of light crude oil, and Stir evenly at a stirring speed of 1000r / min, and cool to natural ambient temperature;

[0129] 3) Preparation of emulsified acid: the volume ratio of the acid phase and the oil phase is 60:40, under the condition of a stirring speed of 2500r / min, the acid phase is slowly added dropwise to the oil phase at a speed of 120 drops / min, dropwise Contin...

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Abstract

The invention provides a preparation method of an acid liquid system. The method comprises the following steps: adding 20-50 parts by mass of an emulsified acid into 50-80 parts by mass of gelled acidto obtain the acid liquid system, preferably adding 25 to 45 parts by mass of an emulsified acid to 55 to 75 parts by mass of gelled acid to obtain the acid liquor system.

Description

technical field [0001] The invention provides a preparation method of an acid liquid system. Background technique [0002] The acid solution in the prior art either has short acid-etched fractures, limited access to the reservoir, and poor effect of acid fracturing; or has poor temperature resistance and high friction, which cannot meet the requirements of deep penetration under high-temperature deep well acid fracturing. transparent purpose. With the continuous deepening of exploration and development of high-temperature carbonate reservoirs, higher requirements are put forward for the performance of high-temperature acid liquid systems in terms of slow speed and low friction. Contents of the invention [0003] The invention provides a method for preparing an acid liquid system, which comprises the following steps: taking 100 parts by volume of the acid liquid system, adding 20 to 50 parts by volume of emulsifying acid to 50 to 80 parts by volume of gelling acid In, the...

Claims

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Application Information

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IPC IPC(8): C09K8/74C08F220/56C08F220/58
CPCC09K8/725C09K8/74C09K8/602C08F220/56C08F220/58C09K2208/34
Inventor 贾文峰蒋廷学张旭东姚奕明刘建坤
Owner CHINA PETROLEUM & CHEM CORP
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