Cementing of geothermal wells

This project is related to drilling of well. Once a specific depth of well is drilled, casing will be run into the well. The casing will be cemented for a better support and to seal the well. [6]
Drilling can only be continued after the cement slurries have reached an acceptable strength through hydration. Therefore, the drilling program can be done more efficiently if the time taken for the cement to hydrate and develop strength can be estimated. The main problem that brought up this project is, how long does it take for the cement slurry to achieve acceptable compressive strength and should temperature be considered? The aim is to determine the radius of thermal influence at cement hydration.. The objective will enable the understanding of the relationship between temperature or thermal influence and time taken for the cement hydration through the analysis of radius of thermal influence. The project mainly focuses on understanding the parameters involved in the research. The downhole temperature controls the pace of chemical reactions during hydration of cement. Besides that, the cement slurry hydrates and develops strength more rapidly with higher formation temperature. An analysis will be carried out using software to show how different formations have different waiting time for the cement to achieve strength based on radius of thermal influence. A semi-analytic formula which allows the estimation of the temperature increase versus setting time is used to describe the transient temperature at the cylinder’s wall, while at the surface of the cylinder the radial heat flow rate is quadratic function of time.