Doctoral Dissertations

Keywords and Phrases

Formation temperature; Heat flow rate; Temperature well test; Thermal behavior


"The wellbore heat flow occurs during different well operations resulting from any temperature differences between the wellbore fluid and the adjacent formation. Understanding the direction and mechanism of heat flow whether it is conduction or convection help to represent this heat exchange mathematically. However, the only available factor used to understand the heat flow behavior is the measured wellbore temperature which can be obtained from the direct measurement while drilling or circulation operations, well logging, well test, or from the production operations. Also, the initial geothermal formation temperature resulting from the geothermal gradient will help to understand the undistributed formation temperature and the heat flow behavior.

In general, there are two type of models; the first type depends on the conservation of heat energy theory for both steady and unsteady satiations. And the second model type depend on the analogy between the pressure and temperature diffusivity equations.

In this study, and in addition to the old boundary conditions that used to solve the heat energy system we introduce two new boundary condition that can expanse the insight of the predictive temperature and then the heat flow rate. Another model was present to investigate a new factor that can be effect the wellbore temperature resulting from the Kinetic rotational energy of the drillstring in drilling operations. The thermal radius and the heat transfer behavior was also investigated for drilling, circulation, and production operations. Finally, a full derivation of the line-source solution of the temperature diffusivity equation, which provide a required recipe to studying the falloff and build-up temperature record of transient temperature test"--Abstract, page iv.


Flori, Ralph E.

Committee Member(s)

Dunn-Norman, Shari
Wei, Mingzhen
Rogers, J. David
Homan, Kelly


Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Petroleum Engineering


Missouri University of Science and Technology

Publication Date

Spring 2020

Journal article titles appearing in thesis/dissertation

  • New analytical solutions of wellbore fluid temperature profiles during drilling, circulating, and cementing operations
  • Influence of frictional or rotational kinetic energy on wellbore fluid-temperature profiles during drilling operations
  • Exploring alteration of near-wellbore geothermal gradient during fluid circulation and production
  • Estimating the initial-formation temperature and flowing-temperature gradient with transient-temperature analysis: Applications in gas reservoirs


xiv, 172 pages

Note about bibliography

Includes bibliographic references.


© 2020 Ahmed Qasim Atiyah Al Saedi, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 11664

Electronic OCLC #