## 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 semianalytical 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.

logs. The adjusted circulation time concept and a semianalytical 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 language | English |
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Title of host publication | Proceedings of the World Geothermal Congress 2005, Antalya-Turkey, 24-29 April 2005 |

Editors | Roland Horne, Ender Okandan |

Number of pages | 8 |

State | Published - 2005 |

Event | World Geothermal Congress 2005 - Antalya, Turkey Duration: 24 Apr 2005 → 29 Apr 2005 |

### Conference

Conference | World Geothermal Congress 2005 |
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Country/Territory | Turkey |

City | Antalya |

Period | 24/04/05 → 29/04/05 |