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Gelatinizing emulsified acid and preparation method thereof

A technology of emulsifying acid and gelling acid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of stability and viscosity that need to be improved

Active Publication Date: 2018-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its stability and viscosity at high temperature need to be improved

Method used

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  • Gelatinizing emulsified acid and preparation method thereof
  • Gelatinizing emulsified acid and preparation method thereof
  • Gelatinizing emulsified acid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Prepare low-viscosity gelling acid according to the following components by weight: take 96.8 parts of hydrochloric acid solution (concentration: 15% wt), slowly add 0.3 parts of polyacrylamide thickener SRAP for acid at a speed of 500r / min -1 (produced by Sinopec Petroleum Engineering Technology Research Institute, SRAP-1), stirred for half an hour to form a uniform solution, then added 1.2 parts of iron ion stabilizer (ethylenediaminetetraacetic acid, Tianjin Guangfu Chemical Reagent Factory) and 1.7 One part of corrosion inhibitor Miramine TO-I (Solvay Company), stirred evenly, sealed at room temperature and stood still for 1 hour;

[0033] 2) The oil phase was prepared according to the following components by weight: 3 parts of span80 and 0.5 part of dodecylamine were heated and dissolved in 96.5 parts of diesel oil, stirred evenly, cooled to room temperature, and set aside;

[0034] 3) Prepare the gelled emulsified acid according to the following components by v...

Embodiment 2

[0036] 1) Prepare low-viscosity gelling acid according to the following components by weight: take 96.7 parts of hydrochloric acid solution with a concentration of 15% wt, and slowly add 0.4 parts of polyacrylamide thickener SRAP- 1 (produced by Sinopec Petroleum Engineering Technology Research Institute, SRAP-1), stirred for half an hour to form a uniform solution, then added 1.2 parts of iron ion stabilizer (ethylenediaminetetraacetic acid, Tianjin Guangfu Chemical Reagent Factory) and 1.7 parts The corrosion inhibitor Miramine TO-I (Solvay Company), stir well, seal room temperature and stand still for 1 hour;

[0037] 2) The oil phase was prepared according to the following components by weight: 3 parts of span80 and 0.5 part of dodecylamine were heated and dissolved in 96.5 parts of diesel oil, stirred evenly, cooled to room temperature, and set aside;

[0038] 3) Prepare the gelled emulsified acid according to the following components by volume: Slowly add the prepared lo...

Embodiment 3

[0040] 1) Prepare low-viscosity gelling acid according to the following components by weight: Take 96.6 parts of hydrochloric acid solution with a concentration of 15% wt, slowly add 0.5 parts of polyacrylamide thickener SRAP- 1 (produced by Sinopec Petroleum Engineering Technology Research Institute, SRAP-1), stirred for half an hour to form a uniform solution, and then added 1.2 parts of iron ion stabilizer (ethylenediaminetetraacetic acid, produced by Tianjin Guangfu Chemical Reagent Factory) and 1.7 parts One part of corrosion inhibitor Miramine TO-I (Solvay Company), stirred evenly, sealed at room temperature and stood still for 1 hour;

[0041] 2) The oil phase was prepared according to the following components by weight: 3 parts of span80 and 0.5 part of dodecylamine were heated and dissolved in 96.5 parts of diesel oil, stirred evenly, cooled to room temperature, and set aside;

[0042]3) Prepare the gelled emulsified acid system according to the following components b...

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Abstract

The invention relates to gelatinizing emulsified acid and a preparation method thereof in the field of carbonate reservoir acid fracturing and production increment. The gelatinizing emulsified acid comprises the following components in parts by volume: low-viscosity gelatinizing acid: 60 to 80 parts, preferably 65 to 75 parts; oil phase: 40 to 20 parts, preferably 35 to 25 parts, wherein based on100 parts by weight of the use amount of the oil phase, the oil phase further comprises 3 to 5 parts by weight of efficient emulsifier, preferably 3.5 to 4.5 parts. The low-viscosity gelatinizing acidcomprises the following components in parts by weight: 96 to 97.2 parts of hydrochloric acid solution, 1.5 to 2 parts of corrosion inhibitor, 1 to 1.5 parts of iron ion stabilizer and 0.3 to 0.6 partof thickening agent for acid, wherein the hydrochloric acid concentration of the hydrochloric acid solution is 15 to 30 percent by weight. The gelatinizing emulsified acid provided by the invention is a novel acid liquid system which integrates the gelatinizing acid and emulsified acid into one; the preparation method is simple; high temperature resistance and viscosity stability are achieved.

Description

technical field [0001] The invention relates to the field of acid fracturing stimulation of carbonate rock reservoirs, and more particularly relates to a gelled emulsified acid and a preparation method thereof. Background technique [0002] With the continuous deepening of exploration and development of high-temperature carbonate reservoirs, higher requirements are put forward for the performance of the acid system, and it is urgent to develop a new type of high-temperature resistant retarded acid system. [0003] Gelling acid (also known as thickening acid) and emulsifying acid are two kinds of retarded acid systems commonly used in acid fracturing of low-permeability carbonate reservoirs. Gelling acid refers to adding a thickener (or gelling agent) to an acid (such as hydrochloric acid) to increase the viscosity of the acid to reduce the H + An acid system that transfers the diffusion rate, reduces fluid loss, prolongs the action distance of the acid, and improves the aci...

Claims

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Application Information

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IPC IPC(8): C09K8/74
CPCC09K8/74
Inventor 贾文峰王宝峰蒋廷学姚奕明陈作刘建坤魏娟明
Owner CHINA PETROLEUM & CHEM CORP
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