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Process for recovering heavy oil utilizing one or more membranes

A technology for recovering oil and oil wells, applied in the direction of membrane, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high maintenance cost, expensive operation, and a large amount of chemical waste sludge

Inactive Publication Date: 2010-09-15
VEOLIA WATER SOLUTIONS & TECH NORTH AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this process has the following disadvantages: it requires a lot of chemicals and produces a lot of waste sludge
These systems thus tend to be more expensive to operate and maintain

Method used

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  • Process for recovering heavy oil utilizing one or more membranes
  • Process for recovering heavy oil utilizing one or more membranes
  • Process for recovering heavy oil utilizing one or more membranes

Examples

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Embodiment Construction

[0030] The present invention requires a process for cleaning produced water for use in steam generation in heavy oil recovery. Heavy oil recovery is generally accomplished by injecting water vapor into heavy oil-bearing subterranean formations. The water vapor heats the oil, which condenses. The resulting oil-water mixture is pumped to the surface, where the oil separates from the mixture, leaving what is known as produced water. The produced water is reused to generate water vapor that is fed back into the oil-bearing formation.

[0031] Produced water includes dissolved organic ions, dissolved organic acids and other dissolved organic compounds, suspended inorganic and organic solids, and dissolved gases. Typically, the total suspended solids in the produced water is less than about 1000 ppm. In addition to suspended solids, produced water from heavy oil recovery processes includes varying fractions of organic and inorganic solids. Dissolved and suspended solids in the p...

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Abstract

An oil recovery process utilizes one or more membranes to remove silica and / or oil from produced water. In one method, the process includes separating oil from produced water and precipitating silica. The produced water having the precipitated silica is directed to a membrane, such as a ceramic membrane, which removes the precipitated silica from the produced water. In some cases, residual oil ispresent and is also removed by the membrane.

Description

[0001] Cross References to Related Applications [0002] Pursuant to 35 U.S.C. §119(e), this application claims priority to the following US provisional application: Application No. 60 / 968,182 filed August 27,2007. This application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to heavy oil recovery processes, and more particularly to oil recovery processes utilizing membrane processes to remove silica and residual oil from produced water upstream of water treatment and steam generation processes. Background technique [0004] Conventional oil recovery involves drilling a well and extracting a mixture of oil and water from the well. The oil is separated from the water, and the water is typically injected into the subterranean formation. Routine recovery works well for low viscosity oils. But conventional oil recovery processes are not very effective for higher viscosity or heavy oils. [0005] Enhanced oil reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24
CPCB01D61/147C02F2101/32C02F1/281B01D2311/06C02F1/40E21B43/24B01D2311/04B01D61/58B01D61/14C02F1/42B01D61/025C02F1/5236B01D71/024C02F2101/10B01D9/0036C02F1/048E21B43/34C02F2103/10C02F1/44C02F9/00B01D9/005E21B43/35B01D2311/2642B01D2311/2623
Inventor K·明尼奇K·班纳吉
Owner VEOLIA WATER SOLUTIONS & TECH NORTH AMERICA
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