Demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields

A technology for offshore oilfields and oil-water separation, which is applied in the treatment of hydrocarbon oil, dehydration/demulsification by chemical methods, petroleum industry, etc., and can solve problems such as overloading of processing units

A technology for offshore oilfields and oil-water separation, which is applied in the treatment of hydrocarbon oil, dehydration/demulsification by chemical methods, petroleum industry, etc., and can solve problems such as overloading of processing units

CN104449813BActive Publication Date: 2016-01-20天津中油科远石油工程有限责任公司
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  • Demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields
  • Demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields
  • Demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of demulsifier for efficient treatment of oil-water separation of crude oil with high clay content in offshore oilfields, characterized in that: the weight percentage of each component of the demulsifier is composed of ethylenediamine polyoxypropylene polyoxyethylene ether (industrial product) 40%, ten Sodium hexaalkylsulfonate (industrial product) 0.4%, quaternary ammonium salt cationic fluorocarbon surfactant (industrial product) 0.7%, methanol (industrial product) 18%, 6-chlorobenzotriazole-1,1, 3,3-Tetramethyluronium hexafluorophosphate (industrial product) 10%, the rest is water.

[0023] Ethylenediamine polyoxypropylene polyoxyethylene ether, sodium hexadecylsulfonate and quaternary ammonium salt cationic fluorocarbon surfactant are copolymerized into polyether fluorocarbon copolymer. The structural formula of ether fluorocarbon copolymer is

[0024]

Embodiment 2

[0026] Application of a demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields.

[0027] The preparation method of the demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields in Example 1: according to the formula, it is made by cross-linking and copolymerization in a high-pressure reactor.

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Abstract

The invention relates to an emulsion breaker for oil-water separation by efficiently treating crude oil with high clay component content on the offshore oil field, belonging to the technical field of oil-water separation of oilfield exploitation. The emulsion breaker for oil-water separation by efficiently treating crude oil with high clay component content on the offshore oil field is characterized by consisting of the following components in percentage by weight: 35%-45% of ethanediamine polyoxypropylene polyoxyethylene ether, 0.2%-0.6% of hexadecyl sodium sulfonate, 0.3%-1.0% of a quaternary ammonium cation fluorocarbon surfactant, 15%-20% of methanol, 8.5%-12% of 6-chlorobenzotriazole-1,1,3,3-tetramethyluronium hexafluorophosphate and the balance of water. The emulsion breaker disclosed by the invention has the advantages of being simple in components, convenient in preparation, quick and efficient, low in cost, strong in pertinence, high in oil-water separation efficiency, small in usage amount, and the like.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation in oilfield exploitation, and in particular relates to a demulsifier for efficient oil-water separation of crude oil with high clay content in offshore oilfields. Background technique [0002] At present, when crude oil is exploited in offshore oilfields and enters the later stage of exploitation, as the water content continues to increase, it becomes turbid like mud, and the clay content reaches about 5%. Because the clay has a small particle size and a large surface area, the adsorption capacity is very high. Strong, in the formation crude oil reservoir, with the stirring of the oil production pump during the production process, a layer of crude oil will be wrapped on the surface of the particles, and then a new emulsification system will be formed, which is called "oil mineral aggregates" (oil mineral aggregates, OMA). When the emulsification system of this structure enters the cr...

Claims

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Application Information

Patent Timeline
20 Jan 2016
Publication
CN104449813B
IPC
C10G33/04
CPC
C10G33/04; C10G2300/1033; C10G2300/201
Inventors
万钢; 亓海燕