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Sludge separator for heavy oil sagd produced fluid treatment

A technology for oil sludge separation and production fluid, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problem of low cementation degree, and achieve the effect of simple preparation process, good practicability, and broad market application prospects

Active Publication Date: 2016-08-24
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to shallow reservoirs and low cementation in some operating areas, the SAGD production fluid has the characteristics of high mud content, fine particles, high temperature, good stability, and high degree of oil-water-sand emulsification, which is difficult to separate by conventional demulsification. There is an urgent need for a new oil, mud, sand, and water separation technology and new process to solve this problem, so as to ensure that SAGD technology can play its due role in super heavy oil production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation: Add 3g of dimethyl diallyl ammonium chloride, 1.1g of maleic anhydride, and 10g of water into a four-neck flask, stir and heat to 60°C to fully dissolve the monomers, then heat up to 70°C Ammonium persulfate accounting for 5% of the total mass of the monomer was dissolved in 10 g of water, slowly dripped into the reaction monomer with a peristaltic pump at a rate of 350 μl / min, and stirred at a constant temperature for 4 hours. After cooling to room temperature, a macromolecular yellow solution with sludge separation effect was obtained. Industrial production can be scaled up with industrial-grade raw materials.

[0026] Application: The product of this embodiment is applied to the SAGD production fluid in the Fengcheng operation area. Put the oil sludge separating agent (the product in this example) and 200ml of the production fluid into a beaker in a constant temperature water bath at 70-80°C, stir for 10 minutes, then let it stand for a reaction at a co...

Embodiment 2

[0028] Preparation: Add 2g of dimethyl diallyl ammonium chloride, 1.5g of maleic anhydride, and 10g of water into a four-neck flask, stir and heat to 60°C to fully dissolve the monomers, then heat up to 85°C Ammonium persulfate accounting for 5% of the total mass of the monomer was dissolved in 10 g of water, slowly dripped into the reaction monomer with a peristaltic pump at a rate of 350 μl / min, and stirred at a constant temperature for 3 hours. After cooling to room temperature, a macromolecular yellow solution with sludge separation effect was obtained. Industrial production can be scaled up with industrial-grade raw materials.

[0029] Application: Apply the product of this example to the SAGD production fluid in the Fengcheng operation area, put the separating agent (the product of this example) and the production fluid into a beaker in a constant temperature water bath at 70-80°C, stir for 10 minutes, and then let it stand at constant temperature for reaction After coo...

Embodiment 3

[0031] Preparation: Add 1g of dimethyl diallyl ammonium chloride, 1g of maleic anhydride, and 10g of water into a four-neck flask, stir and heat to 60°C to fully dissolve the monomers, and then heat up to 80°C to account for Ammonium persulfate with 2% of the total mass of the monomer was dissolved in 10 g of water, slowly dripped into the reaction monomer with a peristaltic pump at a rate of 350 μl / min, and stirred at a constant temperature for 2 hours. After cooling to room temperature, a macromolecular light yellow solution with sludge separation effect was obtained. Industrial production can be scaled up with industrial-grade raw materials.

[0032] Application: Apply the product of this example to the SAGD production fluid in the Fengcheng operation area, put the separating agent (the product of this example) and the production fluid into a beaker in a constant temperature water bath at 70-80°C, stir for 10 minutes, and then let it stand at constant temperature for reacti...

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Abstract

The invention discloses an oil sludge separating agent for processing a thick oil SAGD produced liquid. The method is prepared by the following steps: dissolving the dialkene unsaturated quaternary ammonium salt and the unsaturated anhydride in the water, heating to the temperature of 70-95DEG C, taking the ammonium persulfate as an initiator, dissolving the initiator in the water in dipping mode, reacting for 2-5h at a constant temperature to obtain the yellow settled solution, namely the oil sludge separating agent, wherein the weight of the dialkene unsaturated quaternary ammonium salt is 1-3 parts, the weight of the unsaturated anhydride is 1-1.5 parts and the weight of the water is 10-20 parts; the dosage of the ammonium persulfate is 2-5wt% of the total weight of the dialkene unsaturated quaternary ammonium salt and the unsaturated anhydride. The oil sludge separating agent obtained from the invention contains a high-density positive charge for neutralizing the negative charge on the oil sludge surface; the original natural surface active substance on the oil sludge surface can be replaced by the branched chain structure, the water solubility of the polymer and the pH value of the solution can be increased by adopting the carboxyl functional group; a good oil sludge separation effect can be reached according to the synergistic effects of the three functions.

Description

technical field [0001] The invention belongs to the technical field of heavy oil recovery and treatment in oil fields, and in particular relates to an oil sludge separating agent for SAGD production fluid treatment and a preparation method thereof. Background technique [0002] As conventional oil resources that are easy to exploit and transport become less and less, the development and utilization of unconventional oil resources such as high pour point and high viscosity has become one of the important energy projects in the 21st century. [0003] Steam Assisted Gravity Drainage (SAGD) is a cutting-edge technology in the development of super heavy oil in the world. Its theory is initially based on the principle of water flooding salt mining, that is, injecting fresh water to dissolve the solid salt in the salt layer. The high-concentration salt solution flows downward due to its high density, while the relatively low-density aqueous solution floats on it. The upper part of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/00
Inventor 陈艳玲许顺磊刘勤博王澄滨王益军聂俊博张贵莲
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)