October 2007
Features

Vertical-tube evaporator system provides SAGD-quality feed water

Water treatment and steam generation methods for heavy oil recovery processes have evolved rapidly. Traditionally, Once-Through Steam Generators (OTSGs), driven by natural gas, have been used to produce about 80% quality steam (80% vapor, 20% liquid) for injection into the well to fluidize the heavy oil, especially for cyclic steam operations. However, the more recent Steam-Assisted Gravity Drainage (SAGD) method requires 100% quality steam for injection. The use of OTSG for SAGD applications requires a series of vapor-liquid separators to produce the requisite steam quality. For both SAGD and non-SAGD applications, pre-treatment of the OTSG feed water has consisted of silica reduction in a hot or warm lime softener, filtration and hardness removal by Weak Acid Cation (WAC) ion exchange. In most cases, the OTSG blowdown is disposed by deep well injection. As the use of SAGD increased, the traditional produced water treatment and steam generation methods were re-evaluated...

Please Log IN view this article.

Not yet a subscriber? For just $149/year, you can claim unlimited access to World Oil's content.*

Each subscription includes: 

  • Unlimited access to all content on WorldOil.com
  • Exclusive drilling forecast data, by state, country and region
  • State-by-state results from the survey of U.S. operators
  • Updated producing oil and gas well figures, by state
  • Exclusive access to World Oil's conference presentations
  • Proprietary data tables covering casing, tubing, drill bits and fluids
  • Exclusive World Oil maps (published three times per year)
  • Daily coverage of industry news and developments\
  • Industry whitepapers, webcasts, videos and supplements.

Start your subscription today! 

 

 

*Access will be granted the next business day.
Connect with World Oil
Connect with World Oil, the upstream industry's most trusted source of forecast data, industry trends, and insights into operational and technological advances.