Magnesium Oxide Dosing Systems and Hydrated Lime Handling Systems for Thermal Enhanced Oil Recovery

Magnesium Oxide Dosing Systems and Hydrated Lime Handling Systems for Thermal Enhanced Oil Recovery

Producing oil from deep oil sands reservoirs through Thermal Enhanced Oil Recovery (SAGD or CSS) is a water intensive process. Typically steam requirements range from two to five barrels of water for every barrel of oil produced.

Due to large water requirements, recycling and reuse of produced water is mandatory. However, produced water has high levels of impurities including salts, metals, silica, and organic compounds; to recycle and reuse produced water it must be treated so it can be recycled through a steam generator.

In collaboration with industry, Alberta WaterSMART has created guidelines on Magnesium Oxide (MgO) Dosing Systems and Hydrated Lime Handling Systems for Thermal Enhanced Oil Recovery.

MgO dosing systems

MgO systems operate as a portion of the produced water treatment train. The system feeds MgO slurry to a hot or warm lime softener where silica is removed from the produced water. The operation and maintenance of MgO slurry systems pose numerous challenges to facility operators, making the systems unreliable and time consuming to operate.

Twelve Thermal Enhanced Oil Recovery facilities participated in our collaborative MgO guideline development. The data analysis and anecdotal evidence produced fifty design guidelines and fourteen operation and maintenance guidelines.

Two Magnesium Oxide Dosing System best practice documents were produced:

Hydrated lime handling systems

Hydrated lime (Ca(OH)2 handling systems operate as a portion of the produced water treatment train. The system feeds lime slurry to a hot or warm lime softener to neutralize acidic solutions and to reduce water hardness and associated alkalinity. Like MgO, many operators experience common challenges they tend to manage them on a plant-by-plant basis.

Ten Thermal Enhanced Oil Recovery facilities participated in our collaborative lime handling system guideline development. The data analysis and anecdotal evidence produced fifty-nine design guidelines and twenty-one operation and maintenance guidelines.

Two hydrated lime handing systems for thermal enhanced oil recovery best practice documents were produced:

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