Effects of temperature on foamy oil flow in solution gas-drive in cold lake field

Y. Zhang, A. Chakma, B. B. Maini

Research output: Chapter in Book/Conference paperConference paper

5 Citations (Scopus)

Abstract

The roles of foamy oil flow in cold production of heavy oils under solution gas-drive have been extensively studied in recent years. However, the mechanisms of foamy oil flow in porous media are still not fully understood. The viscosities of heavy oils and bitumen are often so high that the solution gas drive should yield very little oil production. However, several heavy oil reservoirs in Canada and Venezuela have displayed very high solution gas drive recovery factors and foamy oil flow is believed to be the cause. The recovery factor projected for steam stimulation operation in Cold Lake is also very high, up to 30% of OOIP. Since the primary drive energy in Cold Lake comes from solution gas drive, it has been suggested that foamy oil flow may be responsible for this high recovery factor. The objective of this work was to examine the effects of temperature on foamy oil flow in a clean sand with Cold Lake oil and methane gas. Solution gas drive experiments were carried out in a sand-pack at several different temperatures and depletion rates. The results show that in isothermal depletion tests, the highest recovery factor does not occur at the highest temperature used. Instead, a much lower optimum temperature exists which provides the highest recovery. The reasons for this appear to be the diminished gas solubility and reduced foamy behaviour at higher temperatures, which counteract the positive influence of reduced viscosity.

Original languageEnglish
Title of host publicationAnnual Technical Meeting 1999, ATM 1999
PublisherPetroleum Society of Canada (PETSOC)
ISBN (Print)9781613991046
Publication statusPublished - 1999
Externally publishedYes
EventPetroleum Society of Canada Annual Technical Meeting 1999, PETSOC ATM 1999 - Calgary, Canada
Duration: 14 Jun 199918 Jun 1999

Publication series

NameAnnual Technical Meeting 1999, ATM 1999

Conference

ConferencePetroleum Society of Canada Annual Technical Meeting 1999, PETSOC ATM 1999
CountryCanada
CityCalgary
Period14/06/9918/06/99

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    Zhang, Y., Chakma, A., & Maini, B. B. (1999). Effects of temperature on foamy oil flow in solution gas-drive in cold lake field. In Annual Technical Meeting 1999, ATM 1999 (Annual Technical Meeting 1999, ATM 1999). Petroleum Society of Canada (PETSOC).