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A method of using produced water-loaded inverse demulsifier in ASP flooding

An inverse demulsifier and ternary composite technology, which is used in the separation of immiscible liquids and other directions to achieve the effect of good mixing and dispersion.

Active Publication Date: 2019-08-09
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of this invention is to provide a method for using the ASP flooding produced water-loaded reverse-phase demulsifier to solve the problem of throwing the loaded reverse-phase demulsifier granular solid powder into the high-viscosity ASP flooding produced water. plus question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of the supported inverse demulsifier: first synthesize the basic skeleton of the inverse demulsifier through the hydrosilylation reaction, and then carry out the epoxy ring-opening reaction of the polyquaternium salt and the co-modified silicone oil to synthesize the polyether polyquaternium demulsifier Phase demulsifier, and then use silane coupling agent KH-570 to hydrate silica (SiO 2 ·nH 2 O) The surface is hydrophobically modified, and finally the polyether polyquaternary ammonium salt inverse demulsifier molecules and the modified hydrated silica are subjected to surface graft polymerization to prepare a loaded inverse demulsifier.

[0025] Specific steps are as follows:

[0026] 1) Synthesis of the basic skeleton of the inverse demulsifier molecule

[0027] After mixing epoxy ether, methyl ether and hydrogen-containing silicone oil, add the catalyst chloroplatinic acid, stir for 20min~30min, place in a microwave reactor, and react for 10m...

Embodiment 1

[0042] Example 1: 1.5g / L load-type reverse-phase demulsifier solid powder was added to the ASP flooding sewage pipeline by nitrogen pressure injection, the demulsification time was 15min, and the demulsification temperature was 45°C , into the separation tank settling separation time is 30min. The deoiling rate of produced water after ASP flooding is 90.5% after being treated with loaded inverse demulsifier.

Embodiment 2

[0043] Example 2: Mix 2.0g / L load-type reverse phase demulsifier solid powder with ASP flooding produced water under pressure and then directly add to the separation tank. The demulsification time is 10min, the demulsification temperature is 40℃, and the sedimentation The separation time is 40min. The deoiling rate of ASP flooding produced water was 92.0% after being treated with load-type inverse demulsifier.

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Abstract

The invention discloses a use method of a ternary composite flooding produced water supported type reverse-phase demulsifying agent, and belongs to a use method of a reverse-phase demulsifying agent. The use method comprises the following steps: jetting and blowing supported type reverse-phase demulsifying agent solid powder into a ternary composite flooding produced water sewage pipeline through nitrogen under strong pressure according to the adding amount being 0.5 to 2.0 g / L, or adding a two-phase mixture formed by pressurizing and mixing solid powder-oil-containing sewage into ternary composite flooding produced water to enable the supported type reverse-phase demulsifying agent powder particles to be distributed into sewage uniformly; and replacing and neutralizing the charge action of an interfacial film by using the supported type reverse-phase demulsifying agent and through reverse-phase demulsifying agent molecules supported on carrier particles to complete the demulsifying process, wherein oil drops are adsorbed by the carrier particles rapidly after being demulsified and destabilized and are settled and separated, and the supported type reverse-phase demulsifying agent is particular solid powder and the particle size is 0 to 150 microns. The use method of the supported type reverse-phase demulsifying agent, provided by the invention, has the characteristics that mixing and dispersing uniform degree is good, the utilization rate of the powder medicine is increased, and the cost is reduced.

Description

technical field [0001] The invention relates to a method for using a reverse-phase demulsifier, in particular to a method for using a three-element compound flooding produced water-loaded reverse-phase demulsifier. Background technique [0002] Compared with ordinary water flooding, the oil recovery technology of ASP flooding has increased the recovery rate by about 20 percentage points, which has played an important role in the stable production of the oil field, and also produced a large amount of produced water of ASP flooding. The quality of produced water from ASP flooding is complex and difficult to treat, which is an important issue for oilfields to sustain high production and environmental protection. The viscosity of the produced water from ASP flooding is high, the viscosity of the produced water from water flooding is 0.8-0.9 mPa s, and the viscosity of the produced water from polymer flooding is 1-2 mPa s (when the polymer concentration is high, the viscosity of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/04
CPCB01D17/04
Inventor 李小兵
Owner CHINA UNIV OF MINING & TECH
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