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ASP (Alkali-Surfactant-Polymer) oil flooding produced water polymeric adsorbent as well as preparation method and using method

A ternary composite and produced water technology, which is applied in chemical instruments and methods, mining wastewater treatment, adsorption water/sewage treatment, etc., can solve the problems of non-compliance with site requirements, high cost, oil layer damage, etc., and achieve strong removal of polymers The ability of organic matter, the preparation process and the use method are simple, and the effect of reducing suspended solids in water

Active Publication Date: 2018-10-26
CHENGDU KEHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the complex water quality of the sewage produced by ASP flooding, it contains a large amount of residual alkali, surfactants and polymers (such as polyacrylamide PAM), resulting in increased viscosity of sewage and smaller particle size of sewage oil droplets, resulting in serious emulsification of sewage , increasing the difficulty of demulsification and purification of produced fluid
Oilfield produced water is mainly used for reinjection after treatment. The main treatment indicators are oil content and suspended solids. Accelerate the reproduction of microorganisms, cause damage to the oil layer, and reduce the recovery rate of oil
At the same time, the treatment method of "secondary sedimentation + secondary filtration" commonly used in oilfields can no longer meet the requirements of environmental protection, and problems such as reduced equipment processing capacity, long settling time, and unqualified effluent quality have appeared.
Outflow will cause greater environmental pollution
[0004] At present, the conventional method is often used, that is, the pH of the water is adjusted to neutral first, and then the conventional flocculant is added to carry out sedimentation filtration. The disadvantage of this method is that the amount of acid used to adjust the pH is too large, and conventional agents cannot be completely treated. , resulting in the final effluent not up to standard, and the conventional water treatment method uses a large dosage and high cost, which does not meet the site requirements

Method used

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  • ASP (Alkali-Surfactant-Polymer) oil flooding produced water polymeric adsorbent as well as preparation method and using method
  • ASP (Alkali-Surfactant-Polymer) oil flooding produced water polymeric adsorbent as well as preparation method and using method

Examples

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Effect test

Embodiment 1

[0032] The polymer adsorbent for the treatment of produced water by three-element composite oil flooding, the raw materials are prepared in parts by weight: 20 parts of light calcium carbonate, 2 parts of calcium chloride, 25 parts of muscovite, 30 parts of bentonite, 5 parts of sodium silicate, 8 parts Parts of composite aluminum iron.

[0033] Preparation method (1-1): Physically mix the above raw materials to obtain sample 1-1.

[0034] Preparation method (1-2): First, add bentonite to water and dissolve it into a 40% aqueous solution under high-speed stirring for 0.5 hours, then add calcium chloride for modification, the stirring time is 0.5 hours, and let stand after modification After 12 hours, put the solution into a high-speed stirrer for stirring, add sodium silicate at the same time, stir for 0.5 hours, finally filter the solution, dry and pulverize the solid, the particle size is between 100-200 mesh; The good solid can be mixed with light calcium carbonate, muscov...

Embodiment 2

[0042] The polymer adsorbent for the treatment of produced water by three-element composite oil flooding, the raw materials are prepared in parts by weight: 30 parts of light calcium carbonate, 4 parts of calcium chloride, 15 parts of muscovite, 30 parts of bentonite, 10 parts of sodium silicate, 11 parts Parts of composite aluminum iron.

[0043] Preparation method (2-1): Physically mix the above-mentioned raw materials to obtain sample 2-1.

[0044] Preparation method (2-2): First, add bentonite to water and dissolve it into a 50% aqueous solution under high-speed stirring for 0.5 hours, then add calcium chloride for modification, the stirring time is 0.5 hours, and let stand after the modification is completed After 12 hours, put the solution into a high-speed stirrer for stirring, add sodium silicate at the same time, stir for 0.5 hours, finally filter the solution, dry and pulverize the solid, the particle size is between 100-200 mesh; The good solid is mixed with light ...

Embodiment 3

[0051] The polymer adsorbent for the treatment of produced water by three-element composite oil flooding, the raw materials are prepared in parts by weight: 35 parts of light calcium carbonate, 5 parts of calcium chloride, 20 parts of muscovite, 40 parts of bentonite, 10 parts of sodium silicate, 20 parts Parts of composite aluminum iron.

[0052]Preparation method (3-1): Physically mix the above-mentioned raw materials to obtain sample 3-1.

[0053] Preparation method (3-2): First, add bentonite to water and dissolve it into a 55% aqueous solution under high-speed stirring for 0.5 hours, then add calcium chloride for modification, the stirring time is 0.5 hours, and let stand after modification After 12 hours, put the solution into a high-speed stirrer for stirring, add sodium silicate at the same time, stir for 0.5 hours, finally filter the solution, dry and pulverize the solid, the particle size is between 100-200 mesh; The good solid is mixed with light calcium carbonate,...

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Abstract

The invention relates to an ASP (Alkali-Surfactant-Polymer) oil flooding produced water polymeric adsorbent as well as a preparation method and a using method thereof. The ASP oil flooding produced water polymeric adsorbent is prepared from the following components: light calcium carbonate, calcium chloride, white mica, bentonite, sodium silicate and compound aluminum iron. Aiming at the characteristics of ASP oil flooding produced water, the ASP oil flooding produced water polymeric adsorbent has stronger capability of removing polymeric organic matters under a strong alkaline condition, theviscosity of produced water can be reduced to a large extent, water suspension can be effectively reduced, and the standard requirement of reinjection water can be achieved.

Description

technical field [0001] The invention relates to a method for synthesizing a polymer adsorbent used for the treatment of produced water in three-element compound oil flooding. The agent has a strong ability to remove polymers under strong alkaline conditions in view of the characteristics of produced water in three-element compound oil flooding. The ability of organic matter can greatly reduce the viscosity of produced water, and can effectively reduce suspended solids in water, which can meet the standard requirements of reinjection water. Background technique [0002] At present, most oil fields in my country have entered the middle and late stage of oil exploitation, and the water content of the crude oil produced has reached 70%-80%, and some oil fields even reach as high as 90%. The amount of water produced is also increasing. The ASP flooding recovery technology is a typical oil displacement technology among domestic tertiary oil recovery technologies. It uses the "ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F103/10
CPCB01J20/02B01J20/043B01J20/046B01J20/10B01J20/12C02F1/281C02F2103/10
Inventor 张克江马江平王颖吴树林
Owner CHENGDU KEHENG ENVIRONMENTAL PROTECTION TECH