The common practice in production data analysis usually utilizes instantaneous injection and production when seeking a relationship between them, but field experience in heavy oil field indicates that the liquid production can lag the injection by several weeks. Thus, the production lag effect should be taken into account in the process of determining the causal relationship. In this research, we have considered the time-lag effect when analyzing the Kerrobert Toe-to-Heel air injection (THAI) project and have observed two distinct recovery mechanisms: (1) oil production peaks right after the air injection; and (2) peak production occurs at a later time after the air injection. Based on these observations, the well performance profiles at Kerrobert THAI facility is classified into four distinct types. In addition, a mathematical model has also been proposed to represent the production mechanisms. The oil production is then approximated by accumulating the time-lag effect from previous air injection, which yields a better match with the actual cumulative oil production compared with the estimation using the cumulative air-to-oil ratio (cAOR) method.


Article metrics loading...

Loading full text...

Full text loading...


  1. Greves. M; Turta. A.
    (1997). III US005626191A. Retrieved fromhttps://patentimages.storage.googleapis.com/d2/a4/8c/17c98c6c4419c0/US5626191.pdf
    [Google Scholar]
  2. Hajdo, L. E., Hallam, R. J., & Vorndran, L. D. L.
    (1985). Hydrogen Generation During In-Situ Combustion. In SPE California Regional Meeting.https://doi.org/10.2118/13661-MS
    [Google Scholar]
  3. Turta, A., & Greaves, M.
    (2018). Toe-to-Heel Air Injection (THAI). Retrieved April 8, 2018, fromhttp://www.insitucombustion.ca/docs/Advanced_THAI_Brochure.pdf
    [Google Scholar]
  4. Wei.W; Wang.J; Afshordi.S; Gates.I.
    (2018a). An Analysis of THAI at the Kerrobert Operation in Saskatchewan. In Global Petroleum Show. Calgary, Canada.
    [Google Scholar]
  5. Wei. W; Wang. J; Afshordi. S; Gates. I
    . (2018b). An Analysis of the Kerrobert THAI Project. In ThEOR International WorkshopIII. Chengdu, China.
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error