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Acid-salt reaction speed reducer and preparation method thereof

A decelerating agent and reaction technology, which are applied in the field of acid salt reaction decelerating agent and its preparation, can solve the problem of high crude oil output, and achieve the effects of improving acid absorption performance, improving regularity and pressure resistance, and improving liquid diffusivity

Inactive Publication Date: 2019-08-06
NANTONG KEYI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Although the number of carbonatite reservoirs is small, the crude oil production is very high

Method used

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  • Acid-salt reaction speed reducer and preparation method thereof

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preparation example Construction

[0045] The preparation method of salt reaction decelerating agent, wherein, comprises the following steps:

[0046] A) preparation of the cationic polymer

[0047] (1) select dimethyl carbonate, acryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and cross-linking agent to carry out proportioning according to a certain ratio;

[0048] (2) Putting the above-mentioned proportioned monomers into distilled water to prepare the solution;

[0049] (3) adjust the pH value and temperature of the solution so that the pH value of the solution is 5.5 to 6.5, and the temperature is 15±1°C;

[0050] (4) generating free radicals with an aqueous catalyst method to polymerize the above-mentioned monomers to obtain cationic polymers;

[0051] B) Preparation of the anionic polymer

[0052] (1) Select 2-acrylamide-2-methylpropanesulfonic acid, sodium propylene sulfonate, sodium p-styrenesulfonate and cross-linking agent to carry out proportioning according to a ce...

Embodiment 1

[0066] A speed reducer for a salt reaction, the speed reducer includes an acid-absorbing polymer and a coating agent arranged on the surface of the acid-absorbing polymer; the acid-absorbing polymer includes 25wt% cationic polymer, 30wt% anionic polymer, 45wt% % zwitterionic polymers; cationic polymers include 25wt% dimethyl carbonate, 25wt% acryloyloxyethyltrimethylammonium chloride, 15wt% dimethyl diallyl ammonium chloride, 0.5wt% bis Acrylamide, 0.5 wt% diacrylate, and 34 wt% water; anionic polymers include 25 wt% 2-acrylamide-2-methylpropanesulfonic acid, 25 wt% sodium propylene sulfonate, 15 wt% sodium p-styrene sulfonate , 0.5wt% triacrylate, 0.5wt% tetraacrylate and 34wt% water; Zwitterionic polymers include 25wt% acrylamide, 25wt% 2-acrylamide-2-methylpropanesulfonic acid, 15wt% dicarbonate Methyl ester, 6wt% acryloyloxyethyltrimethylammonium chloride, 0.5wt% tetraacrylate, 0.5wt% dimethacrylate and 28wt% water; Parts of pentaerythritol tetraacrylate, 10 parts by weig...

Embodiment 2

[0086] A speed reducer for acid acid reaction, the speed reducer includes an acid-absorbing polymer and a coating agent arranged on the surface of the acid-absorbing polymer; the acid-absorbing polymer includes 30wt% cationic polymer, 40wt% anionic polymer, 30wt% % zwitterionic polymers; cationic polymers include 30 wt% dimethyl carbonate, 20 wt% acryloxyethyltrimethylammonium chloride, 20 wt% dimethyldiallylammonium chloride, 1 wt% triacrylic acid Ester, 1wt% tetraacrylate, 28wt% water; anionic polymers include 30wt% 2-acrylamide-2-methylpropanesulfonic acid, 20wt% propenesulfonate, 20wt% p-styrenesulfonate, 1wt% % diacrylate, 1wt% triacrylate, 28wt% water; zwitterionic polymers include 30wt% acrylamide, 20wt% 2-acrylamide-2-methylpropanesulfonic acid, 16wt% dimethyl carbonate, 8wt% % acryloyloxyethyltrimethylammonium chloride, 0.5wt% tetraacrylate, 0.5wt% dimethacrylate and 25wt% water; the coating agent includes 68 parts by weight of alkyd resin, 37 parts by weight of penta...

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Abstract

The invention discloses an acid-salt reaction speed reducer. The speed reducer includes an acid absorbing polymer and a coating agent arranged on the surface of the acid absorbing polymer; and the acid absorbing polymer includes 25-35 wt% of a cationic polymer, 30-40 wt% of an anionic polymer and 30-45 wt% of a zwitterionic polymer. The speed reducer includes the acid absorbing polymer and the coating agent arranged on the surface of the acid absorbing polymer, the cationic polymer, the anionic polymer and the zwitterionic polymer are cooperatively used as the acid absorbing polymer, so that the liquid diffusivity of the acid absorbing polymer can be enhanced, and acid absorbing performance and speed can be increased; and through the arrangement of the coating agent on the surface of the acid absorbing polymer, the acid absorbing performance of the speed reducer can be further enhanced, and the regularity and compression resistance of the speed reducer can be improved.

Description

technical field [0001] The invention relates to the field of oilfield control and flooding agents, in particular to a salt reaction speed reducer and a preparation method thereof. Background technique [0002] Although the number of carbonatite reservoirs is small, the crude oil production is very high. There are carbonatite oil reservoirs in Northwest China, but the temperature is high (above 100 degrees), and some even reach 180 degrees. [0003] The main measure to increase production of carbonatite reservoirs is acidification, that is, to communicate with oil storage areas and create fractures to produce oil. However, at high temperatures, hydrochloric acid reacts too quickly with formation marble. At 140 degrees, hydrochloric acid and marble react within 15 minutes. . This allows acidizing distances to be very short and the communicating reservoirs to be in close proximity. Contents of the invention [0004] In view of the above shortcomings, the object of the pres...

Claims

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Application Information

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IPC IPC(8): C09K8/74C08F220/34C08F220/58C08F220/56C08F226/02C08F222/38C08F228/02C08F212/14C08F222/10
CPCC08F220/34C08F220/56C08F220/58C09K8/725C09K8/74C08F220/585C08F226/02C08F222/385C08F222/1006C08F228/02C08F212/14
Inventor 唐菲利张雪梅柏清
Owner NANTONG KEYI CHEM
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