Determination of formation temperature from bottom-hole temperature logs-a generalized Horner method

I. M. Kutasov*, L. V. Eppelbaum

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A new technique has been developed for the determination of the formation temperature from bottom-hole temperature logs. The adjusted circulation time concept, and a semi-analytical equation for the dimensionless temperature at the wall of an infinite long cylindrical source with a constant heat flow rate, is used to obtain the working formula. It is shown that the transient shut-in temperature is a function of the mud circulation and shut-in time, formation temperature, thermal diffusivity of formations and well radius. The sensitivity of the predicted values of formation temperature to the thermal diffusivity is shown. Two examples of calculations are presented.

Original languageEnglish
Pages (from-to)90-96
Number of pages7
JournalJournal of Geophysics and Engineering
Volume2
Issue number2
DOIs
StatePublished - 1 Jun 2005

Keywords

  • Adjusted circulation time
  • Borehole
  • Formation temperature
  • Horner method

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