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Composition for preventing formation of water-oil emulsions using additives

a technology of additives and water-oil emulsions, applied in the direction of drilling composition, separation process, chemistry apparatus and process, etc., can solve the problems of oil portion challenging to extract, oil-water emulsions

Inactive Publication Date: 2019-04-04
SAUDI ARABIAN OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The use of 300-500 nanometer silica nanoparticles effectively separates water from oil, reducing emulsion formation and improving oil recovery by maintaining phase separation, even in high-salinity conditions, with a cost-effective and eco-friendly approach suitable for large-scale oil production facilities.

Problems solved by technology

A disadvantageous effect of adding water is the production of oil-water emulsions, from which the oil portion is challenging to extract.

Method used

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  • Composition for preventing formation of water-oil emulsions using additives
  • Composition for preventing formation of water-oil emulsions using additives

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Embodiment Construction

[0019]The disclosure herein pertains to a method of separating oil from the water in emulsions by addition of nanoparticles. In particular, the inventors have determined that water of low salt concentration can be separated from oil in emulsions by addition of nanoparticles of over 300 nanometers in size, at a concentration of approximately 0.2% (Wparticles / Wwater) or higher, and that salty water can be separated from oil in emulsions by addition of similarly-sized nanoparticles at a concentration of approximately 1.6% (Wpt / Wwt) or higher. The nanoparticles can be added with water injection to separate emulsions in downhole locations.

[0020]Nanoparticles are often functionalized to modify their properties such as by the introduction of functional groups. Functionalization is the chemical modification of the surface of nanoparticles, typically with organic or polymer molecules. The addition of such chemical groups to the surface of the nanoparticles is used to modify properties includ...

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Abstract

A method of preventing formation of a water and oil emulsion in a downhole formation containing oil, the method comprises preparing a dispersion of water and a plurality of non-functionalized nanoparticles, each nanoparticle in the plurality of nanoparticles having a size of at least 300 nanometers, and injecting the mixture downhole into contact with the oil downhole. Presence of the plurality of nanoparticles prevents formation of an emulsion between the injected water and the oil.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation-in-part of U.S. patent application Ser. No. 15 / 723,818, filed on Oct. 3, 2017, now allowed, entitled Method for Preventing Formation of Water-Oil Emulsions Using Additives.FIELD OF THE INVENTION[0002]The present invention relates to the problem of preventing formation of water-oil emulsions to enhance oil recovery in the oil and gas industry. In particular, the present invention relates to a method for separating water and oil emulsions using additives at various stages of the oil production process.BACKGROUND OF THE INVENTION[0003]During downhole oil extraction, water is injected to apply pressure and aid in the forcing of oil out of tight formations in reservoirs. A disadvantageous effect of adding water is the production of oil-water emulsions, from which the oil portion is challenging to extract. Water-oil emulsions can also be formed at other stages and locations including during drilling, pr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K8/58C09K8/536
CPCC09K8/536C09K8/58C09K2208/10B01D17/041B01D17/047B01D17/12
Inventor MAHFOUZ, REMIFIHRI, AZIZBOVERO, ENRICOSHAHRANI, ABDULLAH A.ALJAHANI, HAITHAMAL-GHAMDI, ABDULLAH S.TAIE, IHSAN
Owner SAUDI ARABIAN OIL CO