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

被引：45

作者：

Kutasov, IM

Eppelbaum, LV

机构：

[1] Pajarito Enterprises, Los Alamos, NM 87544 USA

[2] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Dept Geophys, IL-69978 Tel Aviv, Israel

来源：

JOURNAL OF GEOPHYSICS AND ENGINEERING | 2005年 / 2卷 / 02期

关键词：

borehole; formation temperature; Horner method; adjusted circulation time;

D O I：

10.1088/1742-2132/2/2/002

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页码：90 / 96

页数：7

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