Objectively, the study collected eight (8) samples of groundwater from 8 different boreholes, as mix-water, from the study area, Kolo Creek. Hence, the mud sample that yield minimum rheological parameter values was recommended as optimum mud compositional concentration.Įxperimentally, the aim of this research paper is to investigate the thickening time (TT) of different ferrous cement slurry systems in high-pressure and high-temperature (HPHT) environment. Additionally, the results also showed that the mud sample with minimum rheological properties that is 15 cp of plastic viscosity and yield point up to 4.5 lb/100ft2 was recommended for achieving optimum pressure loss value of 1813.48 psi using jet impact factor criterion. About 42-45 % of used mud is required which will act as an additive into a newly designed drilling mud hence helps in meeting environmental regulations and minimizing frictional pressure losses. This study showed that reusing drilling mud can help meet environmental regulations. Mud balance was used for measuring the density of prepared samples and a rotational viscometer was used for measuring viscometer dial reading which helped in determining the rheological properties of prepared mud samples. For this purpose, two fluid samples of density 9.5 lb/gal were prepared in the laboratory. The objective of this experimental work is to compose a drilling mud system by utilizing an already used drilling mud which should be capable to minimize the pressure losses caused by mud friction in the mud circulatory system.
This study suggest a reuse of an already utilized mud under environmental friendly scenario. As the drilling operation is completed, drilling mud and produced cuttings (drilling wastes) are disposed of because they contain many harmful chemical substances that not only effect environment but also living life. Rate of penetration (ROP) and drill bit hydraulics should be optimized during drilling operation which could help in minimizing the operation cost. Drilling operation is necessary for extracting the hydrocarbons from sub-surface which indeed requires large investments.
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