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Formula and preparation method of high temperature emulsified acid

A high-temperature emulsification and acid emulsification technology, applied in the field of emulsified acid, can solve the problems of uneven acid release, uneven demulsification, poor stability, etc., and achieve the effect of no pitting corrosion, easy monitoring of emulsion quality, and increased strength.

Inactive Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves an effective and costly type of oil well drilling fluid called OCA (Oleolic Acid Containing Anesthesia). It uses specific types of chemical substances that help break up greasy materials from rocks during exploration or production operations. These chemical agents have certain properties such as being able to increase their solubility when dissolved into water without affecting other important things like hydrocarbons. They also improve stability over time due to increased molecular weight and polar groups formed between them. By adding these ingredients together they create better stabilized solutions compared to traditional methods. Additionally, it suggests controlling the amount of acid added based upon factors like pressure and temperature to ensure consistently good results even after exposure to extreme conditions. Overall, this new method provides technical benefits including improved efficiency, economy, reliability, ease of handling, etc., making its applications across various industries very promising.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance of acid solutions when injected through subterranean layers underground without causing localization damage caused by water breakdown within porous rocks like carbonate deposits.

Method used

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  • Formula and preparation method of high temperature emulsified acid
  • Formula and preparation method of high temperature emulsified acid
  • Formula and preparation method of high temperature emulsified acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare 300mL of acid phase hydrochloric acid with a concentration of 15% and emulsified acid with a volume ratio of 55:45 to acid oil in the room.

[0019] Acid phase preparation: Measure 76mL of industrial hydrochloric acid with a mass percentage of 31%, add 1.65g of corrosion inhibitor and 0.33g of corrosion inhibitor synergist, stir evenly, then add 1.65g of iron ion stabilizer, stir evenly, and dilute to volume with tap water to 165mL.

[0020] Oil phase preparation: Measure 90mL of 0# diesel oil, add 1.5g of emulsifier and 0.9g of co-emulsifier, dissolve evenly, and dilute to 135mL with 0# diesel oil.

[0021] Preparation of emulsified acid: Pour the prepared oil phase into the volume cup of the agitator, adjust the stirring speed to 3000rpm, slowly pour the acid phase into the volume cup of the agitator under stirring conditions, continue stirring for 5min, and measure it with a conductivity tester Conductivity, the conductivity is 0S / m, indicating that the emul...

Embodiment 2

[0026] Prepare 300mL of acid phase hydrochloric acid with a concentration of 15% and an emulsified acid with a volume ratio of acid to oil of 65:35 in the room.

[0027] Acid phase preparation: Measure 88mL of industrial hydrochloric acid with a mass percentage of 31%, add 1.95g of corrosion inhibitor and 0.4g of corrosion inhibitor synergist, stir evenly, then add 1.95g of iron ion stabilizer, stir evenly, and dilute to volume with tap water to 195mL.

[0028] Oil phase preparation: Measure 90mL of 0# diesel oil, add 1.5g of emulsifier and 0.9g of co-emulsifier, dissolve evenly, and dilute to 105mL with 0# diesel oil.

[0029] Preparation of emulsified acid: Pour the prepared oil phase into the volume cup of the agitator, adjust the stirring speed to 3000rpm, slowly pour the acid phase into the volume cup of the agitator under stirring conditions, continue stirring for 5min, and measure it with a conductivity tester Conductivity, the conductivity is 0S / m, indicating that the...

Embodiment 3

[0034] Prepare 300mL of acid phase hydrochloric acid with a concentration of 15% and emulsified acid with an acid-oil volume ratio of 80:20 in the room.

[0035]Acid phase preparation: Measure 112mL of industrial hydrochloric acid with a mass percentage of 31%, add 2.4g of corrosion inhibitor and 0.5g of corrosion inhibitor synergist, stir evenly, then add 2.4g of iron ion stabilizer, stir evenly, and dilute to volume with tap water to 240mL.

[0036] Oil phase preparation: Measure 40mL of 0# diesel oil, add 1.5g of emulsifier and 0.9g of co-emulsifier, dissolve evenly, and dilute to 60mL with 0# diesel oil.

[0037] Preparation of emulsified acid: Pour the prepared oil phase into the volume cup of the agitator, adjust the stirring speed to 3000rpm, slowly pour the acid phase into the volume cup of the agitator under stirring conditions, continue stirring for 5min, and measure it with a conductivity tester Conductivity, the conductivity is 0S / m, indicating that the emulsified...

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Abstract

The invention relates to a formula and preparation method of high temperature stable emulsified acid. The formula of the high temperature stable emulsified acid comprises the following components in mass percent: 55.0-80.0 percent of 15-28% hydrochloric acid, 17.0-42.5 percent of diesel oil No. 0, 0.2-0.7 percent of an emulsifying agent, 0.2-0.5 percent of a co-emulsifier, 0.8-2.5 percent of a corrosion inhibitor, 0.2-0.5 percent of a corrosion inhibition synergistic agent and 1.0-2.0 percent of a ferric ion stabilizer, wherein the emulsifying agent is an ester with 12-18 carbon atoms and unsaturated double bonds or acetate of the ester; the co-emulsifier is sorbitan oleate; the corrosion inhibitor is a condensation compound of aldehyde, inorganic amines and cyclic ketones; the corrosion inhibition synergistic agent is cuprous chloride, potassium iodide, formamide or pyroantimonate; and the ferric ion stabilizer is nitrilotriacetic acid or sodium erythorbate. According to the formula disclosed by the invention, the corrosion inhibitor and the emulsifying agent have good compatibility, the preparation technology is simple, the operation is convenient, and the quality of the emulsified acid is easily controlled.

Description

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Claims

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Application Information

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Owner PETROCHINA CO LTD
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