LyrArc Article Gist
1. GEOGRAPHICAL LOCATIONS WHERE STEAM INJECTION IS BEING TRIED TO GET HEAVY OIL OUT. Chevron has a pilot project for heavy oil reserves in Wafra, in the neutral zone between Kuwait and Saudi Arabia. Saudis are considering the Manifa field which has a large heavy oil component. Occidental Petroleum is planning to spend $2 billion on a large scale steam injection project in the Mukhaizna field in Oman. Kuwait is planning a pilot project to exploit its northern heavy oil fields. Three years ago the Geological Survey estimated that the world has more than one trillion barrels of heavy oil, mostly in Canada, Venezuela, and elsewhere in the western hemisphere. The Middle East has large heavy oil reserves which have been underestimated. 2. STEAM INJECTION TECHNIQUES TO EXTRACT HEAVY OIL. Heavy oil can be sludge like or thick as molasses is tough to bring up to the surface. It also contains more contaminants like metals and sulfur than light oil, which means in addition to extraction costs for steam injection there are costs for special refineries that can process heavy oil. Without steam the recovery rates for heavy oil reserves run as low as 5% compared to 35% for conventional pumping of light oil deposits. At the Wafra field a Chevron oil recovery project with the Saudis only 3% could have been recovered of the heavy oil, with new steam techniques this figure goes up to 40%. Costs for similiar steam injection widely used by Chevron in its Bakersfield oil fields are about $14 per barrel which leaves a hefty profit margin at today's prices. The heavy oil in the Middle East is different from Bakersfield in that its locked inside carbonate formations of softer rock with fissures. If steam leaks through fissures in the rock then its harder to heat the heavy oil and would cost more in natural gas that makes the steam. At Bakersfield some reservoirs have seen recovery rates go upto as high as 80%. The Wafra project will move into its 2nd stage with 16 injection wells and 25 producing well as well as the installation of water treatment facilities and steam generation facilities. Once the molasses like heavy oil is heated it turns into watery syrup, the oil drains down with gravity and is pumped out from outlying producing wells.