ENHANCED OIL RECOVERY
Enhanced Oil Recovery through polymer flooding is a technology used for improving oil recovery - particularly in older and declining oil reservoirs containing viscous crude oil. The addition of polymers to the water enables a better displacement of oil and improves the recovery factor.
EOR increases the amount of crude oil that can be extracted from a field, over and above conventional primary depletion, or basic water flooding, which typically will recover 20-40% of the Stock Tank Oil Initially In Place (STOIIP). EOR is used for improving oil recovery, particularly in older and declining oil reservoirs.
• Successful full-field peak polymer injection (520 kbpd) achieved in the Mangala field; all five formations of Mangala being targeted
• World’s largest centralized polymer mixing facility with a capacity of 80,000 blpd of 15,000 ppm mother solution operational at the site
• Water cut decrease observed in multiple wells pointing to excellent reservoir response
• Mangala field has produced over 34% of its initial oil in place within 12 years of the start of production due to an aggressive EOR strategy
• The polymer EOR method is expanded to Bhagyam and Aishwariya fields. Improved oil production was observed in the initial phase