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.
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页码：90 / 96
页数：7
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