Open AccessThe non-Newtonian fluid mathematical model for strata static temperature forecast
Author(s) -
Yongcun Guo,
Yunbo Zeng,
LU De-tang
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.802
Subject(s) - temperature gradient , casing , drilling fluid , geology , mechanics , thermal , field (mathematics) , drilling , non newtonian fluid , thermodynamics , materials science , petroleum engineering , geotechnical engineering , physics , mathematics , meteorology , pure mathematics , metallurgy
Firstly,we choose a strata temperature gradient and start to compute.According to thermodynamic parameters,mud fluid parameters and well casing structure parameters etc.,the exit temperature of mud fluid can be obtained.By comparing the calculated value with the measured value of the exit temperature,we correct the chosen strata temperature gradient.Sequentially,we do above_mentioned works repeatedly until a proper strata temperature gradient is gained.Based on this,derived from the equations of thermodynamics and fluid mechanics,we can obtain the temperature variation along the depth of sidewall,and the mathematical model of distribution of strata temperature.Since mud fluid,rock and the temperature field are interactive and interfering during the process of drilling wells,the above technique provides a new method for investigating the theory and applications of the coupled thermal_hydrological_mechanical processes.