Presentation Title

Screening of Commercial Ion Exchange Resins for Oil-field Produced Water Softening

Start Date

November 2016

End Date

November 2016

Location

HUB 302-174

Type of Presentation

Poster

Abstract

Local oil industry injects large volumes of steam for recovering viscous and heavy oil from numerous oilfields located in the Kern County. For generating steam, industry mainly relies on oilfield-produced water, a byproduct of oil production process. The oilfield-produced water often contains calcium and magnesium ions which form salts that are not very soluble. However, prior to use of oilfield-produced water for steam generation; its hardness needs to be removed. Hardness is a term that is used to describe the amounts of calcium and magnesium present in water.

In this project, a simple ion exchange experimental setup was used to test three commercially available resins (A, B, C) for their efficacy in removal of water hardness and especially the removal of scale causing calcium ion. All three ion exchange resins tested so far were able to effectively remove calcium ion from a 500 part per million (ppm) calcium chloride solution that was used as feed water while representing the typical hardness in oil-field produced water. However, Resin A lasted longer compared to other resins. Resin A was spent after treating 15 bed volume of the feed water compared to Resin A and B that lost their efficiency after treating only 11 bed volumes of feed water.

The results show that Resin A is the most efficient option out of three tested commercially available ion exchange resins. It softened the maximum number of bed volumes of feed water and the least number of bed volumes of regenerant (5 wt% sodium chloride solution).

Future work includes to test Resin A for its efficacy in removing hardness from actual oil-field water sample supplied by local oil-field operators. The options for on-site production of regenerant using the oil-field produced water itself will also be researched.

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Nov 12th, 1:00 PM Nov 12th, 2:00 PM

Screening of Commercial Ion Exchange Resins for Oil-field Produced Water Softening

HUB 302-174

Local oil industry injects large volumes of steam for recovering viscous and heavy oil from numerous oilfields located in the Kern County. For generating steam, industry mainly relies on oilfield-produced water, a byproduct of oil production process. The oilfield-produced water often contains calcium and magnesium ions which form salts that are not very soluble. However, prior to use of oilfield-produced water for steam generation; its hardness needs to be removed. Hardness is a term that is used to describe the amounts of calcium and magnesium present in water.

In this project, a simple ion exchange experimental setup was used to test three commercially available resins (A, B, C) for their efficacy in removal of water hardness and especially the removal of scale causing calcium ion. All three ion exchange resins tested so far were able to effectively remove calcium ion from a 500 part per million (ppm) calcium chloride solution that was used as feed water while representing the typical hardness in oil-field produced water. However, Resin A lasted longer compared to other resins. Resin A was spent after treating 15 bed volume of the feed water compared to Resin A and B that lost their efficiency after treating only 11 bed volumes of feed water.

The results show that Resin A is the most efficient option out of three tested commercially available ion exchange resins. It softened the maximum number of bed volumes of feed water and the least number of bed volumes of regenerant (5 wt% sodium chloride solution).

Future work includes to test Resin A for its efficacy in removing hardness from actual oil-field water sample supplied by local oil-field operators. The options for on-site production of regenerant using the oil-field produced water itself will also be researched.