Coating type crosslinker and preparation method and application thereof

A cross-linking agent and coated technology, which is applied in the field of coated cross-linking agent and its preparation, can solve the problems that the redox system does not have slow cross-linking, the injection capacity is reduced in the water flooding stage, and the delayed cross-linking time is limited. , to achieve the effects of controllable gelling strength, long gelling time, saving personnel and construction costs

Inactive Publication Date: 2009-12-30
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These cross-linking agents have the following shortcomings or deficiencies: 1. The redox system basically does not have the effect of slowing cross-linking, and the currently used organic acid chromium delays cross-linking time is limited, and there is a certain risk in field application; 2. In the field oil displacement t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Accurately weigh raw materials: 1 kg chromium lactate, 0.4 kg deionized water, 70 kg liquid paraffin, 80 kg cyclohexane, 0.3 kg ethylenediamine, 0.12 kg sorbitan monostearate, 0.15 kg octane Phenol polyoxyethylene (10) ether, 1.2 kilograms of toluene 2,4-diisocyanate.

[0023] Preparation method: add chromium lactate into deionized water at room temperature, stir well to prepare chromium lactate aqueous solution A; then add ethylenediamine to solution A, stir evenly at 20 rpm to obtain solution B; then in solution B First add liquid paraffin, then add sorbitan monostearate and octylphenol polyoxyethylene (10) ether, and stir at a stirring speed of 1000 rpm for 30 minutes to obtain emulsion C; Toluene 2,4-diisocyanate was added dropwise to the emulsion C, and the dropwise addition was completed within 5 minutes, and the stirring reaction was carried out at a stirring speed of 100 rpm for 50 minutes to obtain a semi-finished product; at a stirring speed of 50 rpm, the abo...

Embodiment 2

[0025] Accurately weigh raw materials: 2 kg of chromium lactate, 2.5 kg of deionized water, 80 kg of liquid paraffin, 90 kg of cyclohexane, 1 kg of ethylenediamine, 0.5 kg of sorbitan monostearate, 0.4 kg of octane Alkylphenol polyoxyethylene (10) ether, 2 kilograms of toluene 2,4-diisocyanate.

[0026] Preparation method: add chromium lactate into deionized water at room temperature, stir evenly, and prepare chromium lactate aqueous solution A; then add ethylenediamine into solution A, and stir evenly at 50 rpm to obtain solution B; then in solution B First add liquid paraffin, then add sorbitan monostearate and octylphenol polyoxyethylene (10) ether, and stir at a stirring speed of 1000 rpm for 30 minutes to obtain emulsion C; Toluene 2,4-diisocyanate was added dropwise to the emulsion C, and the dropwise addition was completed within 10 minutes, and the stirring reaction was carried out at a stirring speed of 100 rpm for 50 minutes to obtain a semi-finished product; at a st...

Embodiment 3

[0028] Accurately weigh raw materials: 3 kg of chromium lactate, 7 kg of deionized water, 100 kg of liquid paraffin, 100 kg of cyclohexane, 2 kg of ethylenediamine, 1 kg of sorbitan monostearate, 1 kg of octane Alkylphenol polyoxyethylene (10) ether, 4 kg of toluene 2,4-diisocyanate.

[0029] Preparation method: add chromium lactate into deionized water at room temperature, stir well to prepare chromium lactate aqueous solution A; then add ethylenediamine to solution A, stir evenly at 100 rpm to obtain solution B; then in solution B First add liquid paraffin, then add sorbitan monostearate and octylphenol polyoxyethylene (10) ether, and stir at a stirring speed of 1000 rpm for 30 minutes to obtain emulsion C; Toluene 2,4-diisocyanate was added dropwise to the emulsion C, and the dropwise addition was completed within 10 minutes, and the stirring reaction was carried out at a stirring speed of 100 rpm for 50 minutes to obtain a semi-finished product; at a stirring speed of 50 r...

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PUM

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Abstract

The invention discloses a coating type crosslinker and a preparation method and application thereof. The coating-type crosslinker is prepared by using toluene-2,4-diisocyanate as an oil-soluble monomer, whiteruss as an oil phase, ethanediamine as a water-soluble monomer, organic acid chrome aqueous solution as a core material and octyl phenol polyoxyethylene (10) ether and sorbitol anhydride monostearate as emulsifiers. A crosslinking polymer system formed by the crosslinker and a suitable polymer has long gelatinizing time and high and controllable gelatinizing strength and can enter the deep part of stratum to achieve the aim of deep profile control or profile modification.

Description

technical field [0001] The invention relates to an oil field chemical agent and its preparation method and application, in particular to a coated crosslinking agent and its preparation method and application. Background technique [0002] The cross-linking agents currently used in oil fields mainly include high-valent metal ions such as: Cr 3+ 、Al 3+ 、Ti 3+ , Aldehydes such as: formaldehyde and resins such as: phenolic resin, etc. Cr 3+ , the applied product is a redox system, mainly a mixture of dichromate and reducing agent and organic acid chromium; the organic acid chromium is mainly chromium lactate and chromium malonate. Publication number is that the Chinese patent of CN1560119A discloses a kind of " preparation method of slow cross-linking agent for polyacrylamide gel ", and the slow cross-linking agent of its preparation is sodium dichromate, concentrated sulfuric acid, sodium sulfite, humic acid, acetic acid, Citric acid, 40% sodium hydroxide solution, and wat...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/32C08K5/103C08K5/098C08K5/06C08L33/26C08L75/02C09K8/42C09K8/588
Inventor 汪庐山刘承杰罗跃靳彦欣贾庆升胡秋平徐鹏辛爱渊
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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