| Title | An Improved Horner Method for Determination of Formation Temperature |
|---|---|
| Authors | Izzy Kutasov and Lev Eppelbaum |
| Year | 2005 |
| Conference | World Geothermal Congress |
| Keywords | formation temperature, Horner method, adjusted circulation time |
| Abstract | A new technique has been developed for 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. |