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A demulsifier suitable for high-sulfur and high-salt production fluid crude oil emulsion

A technology for produced liquid and emulsion, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of high energy consumption, high consumption, unstable crude oil water content index, etc., to reduce energy consumption, reduce the dosage of chemicals, improve the The effect of demulsification and dehydration efficiency

Active Publication Date: 2015-11-25
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Applying existing demulsifiers to demulsification and dehydration of high-sulfur and high-salt production fluids still has problems such as high dosage, high energy consumption, and unstable water content of crude oil after treatment.

Method used

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  • A demulsifier suitable for high-sulfur and high-salt production fluid crude oil emulsion
  • A demulsifier suitable for high-sulfur and high-salt production fluid crude oil emulsion
  • A demulsifier suitable for high-sulfur and high-salt production fluid crude oil emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put hydrogen-containing polyoxysilane and KOH catalyst into the synthesis kettle, repeatedly fill with nitrogen and pump negative pressure, until the oxygen in the kettle is completely converted, slowly raise the temperature to 120 ° C ~ 150 ° C, and drop PO (propylene oxide) in proportion , keep the pressure at 0.2-0.5MPa, and the temperature does not exceed 150°C. After the dropwise addition was completed, the constant temperature was maintained for 30 min. Then add EO (ethylene oxide) dropwise in proportion. Similarly, keep the pressure at 0.2-0.5 MPa, and the temperature does not exceed 150°C. Control PO:EO=1:2.5~3. After the dropwise addition was completed, the constant temperature was maintained for 40 min. The temperature is lowered to below 30°C, and poly-12 alkyl α-olefin and ethylene glycol are sequentially added to obtain a finished demulsifier.

[0026] Among them, the synthesis of poly-12 alkyl α-olefin is an existing process, which will not be described...

Embodiment 2

[0029] Put hydrogen-containing polyoxysilane and KOH catalyst into the synthesis kettle, repeatedly fill with nitrogen and pump negative pressure, until the oxygen in the kettle is completely converted, slowly raise the temperature to 120 ° C ~ 150 ° C, and drop PO (propylene oxide) in proportion , keep the pressure at 0.2-0.5MPa, and the temperature does not exceed 150°C. After the dropwise addition was completed, the constant temperature was maintained for 30 min. Then add EO (ethylene oxide) dropwise in proportion. Similarly, keep the pressure at 0.2-0.5 MPa, and the temperature does not exceed 150°C. Control PO:EO=1:1.5~2. After the dropwise addition was completed, the constant temperature was maintained for 40 min. The temperature is lowered to below 30°C, and poly-18 alkyl α-olefin and glycerol are sequentially added to obtain a finished demulsifier.

[0030] Among them, the synthesis of poly-18 alkyl α-olefin is an existing process, which will not be described in det...

Embodiment 3

[0033] Put hydrogen-containing polyoxysilane and KOH catalyst into the synthesis kettle, repeatedly fill with nitrogen and pump negative pressure, until the oxygen in the kettle is completely converted, slowly raise the temperature to 120 ° C ~ 150 ° C, and drop PO (propylene oxide) in proportion , keep the pressure at 0.2-0.5MPa, and the temperature does not exceed 150°C. After the dropwise addition was completed, the constant temperature was maintained for 30 min. Then add EO (ethylene oxide) dropwise in proportion. Similarly, keep the pressure at 0.2-0.5 MPa, and the temperature does not exceed 150°C. Control PO:EO=1:3~3.5. After the dropwise addition was completed, the constant temperature was maintained for 40 min. The temperature is lowered to below 30°C, and the mixed polyalkylene α-olefin and propylene glycol are sequentially added to obtain a finished demulsifier.

[0034] Among them, the synthesis of polyalkyl α-olefins is an existing process, which will not be de...

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Abstract

The invention relates to a demulsifier for a high-sulfur high-salt crude-oil extracting emulsion. The demulsifer comprises the following raw materials in percentage by weight: 60-65% of a silicone containing surfactant, 1-5% of a vinyl copolymer and 25-30% of a polar solvent. The demulsifier is developed according to the composition characteristic of the high-sulfur high-salt crude-oil extracting emulsion. By using the demulsifier, the demulsifying and dehydrating efficiency can be improved effectively, the use amount of reagents can be reduced and the content of water in the dehydrated crude oil can meet the specified requirement, and specifically, the dehydrating efficiency can be improved by more than 30% under the condition that the use amount of reagents is reduced by 20% and the content of water in the dehydrated crude oil can be reduced to be below 0.2%. In addition, by using the demulsifier, the energy consumed in the treatment process can be decreased effectively.

Description

technical field [0001] The invention relates to a demulsifier suitable for high-sulfur and high-salt production fluid crude oil emulsion. Background technique [0002] There are many types of demulsifiers for oilfield production fluids. In terms of structure type, different initiators are mainly connected with polyethylene oxide and propylene oxide; in terms of molecular conformation, there are mainly straight chain, multi-branched, star and tree; in terms of scope of application, there are General type, low temperature type, water purification type, and special oil type. [0003] High-sulfur and high-salt production fluid is a type of production fluid with very special composition and properties. It is necessary to determine the appropriate demulsifier structure according to its characteristics in order to achieve better results. At present, there are also some demulsifiers for high-sulfur and high-salt production fluids, but due to market demand, the existing such demuls...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04
Inventor 李世洪孙岩张鹏徐福帅
Owner BC P INC CHINA NAT PETROLEUM CORP
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