1887

Abstract

Summary

Analysis of pressure falloff tests gives initial estimates of swept volume, essential for the evaluation of a thermal recovery process. The analysis is based on a two-zone composite reservoir model with highly contrasting fluid mobilities, where the swept zone is assumed to behave as a closed reservoir for a short period exhibiting pseudo steady state behavior.

The upward buckling of the pressure derivative curves at late times in some cases could not be explained using the conventional composite models. This issue and some of the errors associated with the estimation of swept volume may possibly be related to heat loss which could have significant effects on the pressure behavior and dominate the pseudo steady state flow.

A model for the analysis of falloff tests with significant heat loss was suggested by . However, there are limitations in the application of this approach to practical steam falloff tests. Moreover, permeability should be known in advance for further analysis.

In this paper, a modified method of analysis considering heat loss is discussed which makes the flow regime identification easier and removes some of the practical limitations. Results of the analysis show improvement over the estimates obtained by other methods.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20141806
2014-09-08
2020-05-30
Loading full text...

Full text loading...

References

  1. Duong, A.N.
    [2008] Thermal transient analysis applied to horizontal wells. SPE international thermal operations and heavy oil symposium, Calgary, Canada. Paper presentation SPE 117435.
    [Google Scholar]
  2. Eggenschwiler, M., RameyH. J., Jr., Satman, A. and Cinco-ley, H.
    [1980] Interpretation of injection well pressure transient data in thermal oil recovery. California Regional Meeting of SPE of AIME, Los Angeles, USA. Paper presentation SPE 8908.
    [Google Scholar]
  3. Grant, M.A. and Sorey, M.L.
    [1979] The Compressibility and hydraulic diffusivity of a water-steam flow. Water Resources Research, 15(3), 684–686.
    [Google Scholar]
  4. lssaka, M.B. and Ambastha, A.K.
    [1992] Thermal well testing for a horizontal well. CIM Annual Technical Meeting, Calgary, Alberta, Canada. Paper presentation CIM 92–24.
    [Google Scholar]
  5. Jahanbani, G.A., Jelmert, T.A. and Kleppe, J.
    [2011] Simulation study of thermal well test analysis in steam injection wells. SPE Heavy Oil Conference and Exhibition, Kuwait City, Kuwait. Paper presentation SPE 150295.
    [Google Scholar]
  6. JahanbaniG.A., Jelmert, T.A., Kleppe, J., Ashrafi, M., Souraki, Y. and Torsaeter, O.
    [2012a] Investigation of the applicability of thermal well test analysis in steam injection wells for Athabasca heavy oil. EAGE Annual Conference & Exhibition incorporating SPE Europec, Copenhagen, Denmark. Paper presentation SPE 154182.
    [Google Scholar]
  7. JahanbaniG.A., Jelmert, T.A. and Kleppe, J.
    [2012b] Investigation of thermal well test analysis for horizontal wells in SAGD process. SPE Annual Technical Conference and Exhibition (ATCE), San Antonio, USA. Paper presentation SPE 159680.
    [Google Scholar]
  8. JahanbaniG.A. and Kleppe, J.
    [2013] Study of thermal well test analysis for vertical and horizontal steam injection wells with application to Athabasca heavy oil. SPE Enhanced Oil Recovery Conference, Kuala Lumpur, Malaysia. Paper presentation SPE 165214.
    [Google Scholar]
  9. Kazemi, H.
    [1966] Locating a burning front by pressure transient measurements. Journal of Petroleum Technology, 18(2), 227–232.
    [Google Scholar]
  10. Messner, G.L. and Williams, R.L.
    [1982a] Further investigation of pressure transient testing in steamflood projects. 57th Annual Meeting of SPE of AIME, New Orleans, USA. Paper presentation SPE 11087.
    [Google Scholar]
  11. [1982b] Application of pressure transient analysis in steam injection wells. California Regional Meeting of SPE of AIME, San Francisco, USA. Paper presentation SPE 10781.
    [Google Scholar]
  12. Sheng, J.J. and Ambastha, A.K.
    [1995] A practical thermal well testing method including heat loss effects. SPE International Heavy Oil Symposium, Calgary, Canada. Paper presentation SPE 30306.
    [Google Scholar]
  13. Stanislav, J.F., Easwaran, C.V. and Kokal, S.L.
    [1989] Interpretation of thermal well falloff testing. SPE Formation Evaluation Journal, 4(2), 181–186.
    [Google Scholar]
  14. Walsh, J.W., RameyH.J.Jr., and Brigham, WE.
    [1981] Thermal injection well falloff testing. 56th Annual meeting of SPE of AIME, San Antonio, USA. Paper presentation SPE 10227.
    [Google Scholar]
  15. Yortsos, Y.C.
    [1984] Distribution of fluid phases within the steam zone in steam-injection processes. SPE Journal, 24(4), 458–466.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20141806
Loading
/content/papers/10.3997/2214-4609.20141806
Loading

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