Mathematical modelling of thermal profile of well drilling thermal profile in one of the Iran southern vertical wells to optimize the rheological characteristics of the digging fluid

Articles in Press

Document Type : Research Paper

Author

Petrolume, Mining And Materials Group, Faculty of Civil and Earth Resources Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

10.22078/jpst.2024.5056.1862

Abstract

Drilling fluid plays important roles in a well drilling process, therefore it is important to studies the effect of several of parameters on it.One of the main purposes of using fluid is to cool down the drill and the process.In this study the aim is to investigate the role of fluid as a heat exchanger from the bottom to the surface of the well and the surrounding area.On this base the heat can affect variation of the fluid characteristics such as rheology, density and pressure.Knowledge about thermal distribution of drilling fluid plays an important role in designing the fluid,estimating drop pressure, cementing and fencing and thermal energy in the well. This thermal profile is made by using mathematical modelling on the base of energy conservation and heat transfer auxiliary equations in the form of displacement, delivery and fluid movement in the well. The equations in the model are solved by coding in MATLAB and the results obtained are shown by thermal profiles for every part of the well. Temperature distribution of fluid in the digging pipe, lining pipe, mid lining and surface lining is specified. Thermal profile is obtained for both water base fluid and oil base fluid. In this research it is proved that thermal gradient of earth, well depth, rate of fluid flow in the well, density and thermal capacity of the fluid effect the thermal profile of the fluid and also there is a large difference between the thermal profile of the fluid in a digging well.

Keywords

Journal of Petroleum Science and Technology

Articles in Press, Accepted Manuscript
Available Online from 02 December 2024

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