Salt resistance and calcium resistant deep extra-heavy oil emulsifier and viscosity dropping agent

A technology for emulsification, viscosity reduction, salt resistance and calcium resistance, which is applied in the fields of organic chemistry, chemical instruments and methods, and sulfonic acid preparation to achieve the effects of strong emulsifying ability, mild reaction conditions and simple production process

Inactive Publication Date: 2013-06-05
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the exploitation of deep extra-heavy oil with high temperature, high salinity, and high calcium ion content, the existing conventional surfactants cannot meet the actual needs of the on-site environmental conditions.

Method used

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  • Salt resistance and calcium resistant deep extra-heavy oil emulsifier and viscosity dropping agent
  • Salt resistance and calcium resistant deep extra-heavy oil emulsifier and viscosity dropping agent
  • Salt resistance and calcium resistant deep extra-heavy oil emulsifier and viscosity dropping agent

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Embodiment Construction

[0023] 1. Synthesis of glycerol ether

[0024] In a clean and dry three-necked flask, add 1 mol of long-chain fatty alcohol, add 1 to 1.5 mol of base, 2 to 4 mol of distilled water, and 0.015 to 0.02 mol of phase transfer catalyst tetrabutylammonium bromide. Add ring at 40°C to 55°C. Oxychloropropane is 1 to 2.5 mol, heated and stirred for reaction for 2 to 6 hours, cooled, filtered with suction, dried with anhydrous magnesium sulfate, filtered with suction, separated, and then distilled under reduced pressure to remove impurities to obtain monoglycidyl ether.

[0025] 2. Synthesis of dialkyl alkoxy glycol

[0026] Weigh 1 mol of the monoglycidyl ether prepared, and then weigh the diol at a molar ratio of 1:1 to 4:1, while adding 3% to 6% of the total mass of the alkali metal hydroxide catalyst at 90°C The reaction is stirred for 18-24 hours. After cooling, the mixture is subjected to vacuum distillation to remove impurities by using the difference in boiling points to obtain dialky...

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Abstract

The invention relates to a salt resistance and calcium resistant deep extra-heavy oil emulsifier and viscosity dropping agent, belonging to the technical field of oil-field chemicals. The agent is characterized in that the preparation method comprises the following steps: using long-chain aliphatic alcohol as initiator and dropwise adding epichlorohydrin to perform a reaction under the actions ofphase transfer catalyst and alkali, filtrating the reacted mixture, drying, performing reduced pressure distillation to prepare glycidyl ether; mixing divalent alcohol with the prepared glycidyl ether in a molar ratio of 1-4:1, performing a reaction under the action of catalyst alkali metal hydroxide to generate dialkyl alkoxy glycol, performing reduced pressure distillation of the reaction mixedliquor to purify the product; using dialkyl alkoxy glycol and chlorosulfonic acid to react, and neutralizing with alkali to obtain anionic gemini surfactant. The invention can be dissolved in formation water with high mineralization and high calcium ion content and mixed with deep extra-heavy oil to reduce the oil-water interfacial tension, thus the viscosity of the deep extra-heavy oil in the shaft can be effectively reduced and the demands of the shaft conventional lifting exploitation can be satisfied.

Description

Technical field: [0001] The invention relates to a salt-resistant and calcium-resistant deep-seated super heavy oil emulsification viscosity reducer, belonging to the technical field of oil field chemical agent design. Background technique: [0002] Deep-seated heavy oil is usually buried below 3000 meters, and it has the characteristics that it can flow into the wellbore smoothly at the formation temperature, but the wellbore viscosity reduction must be implemented to lift it to the surface. If the formation temperature is 50℃, the deep heavy oil can be divided into ordinary deep heavy oil, extra heavy oil and super heavy oil according to the viscosity of the deep heavy oil. The mining of deep heavy oil has high formation water salinity, The characteristics of high calcium ion content and high formation temperature. The existing production technologies such as steam huff and puff, steam injection, and electric heating commonly used in the production of shallow heavy oil have po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/08C07C309/41C09K8/584
Inventor 唐善法岳泉伍锐东刘霜黄琨
Owner YANGTZE UNIVERSITY
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