The global demands on oil and gas exploring deep wells are increasing quickly. Drilling at deep and ultra-deep faces a wide range of difficult challenges. One of the challenges is the negative impact on the rheological properties of the drilling fluids when exposed to high temperature high pressure conditions. To operate a drilling operation successfully, the drilling engineer must have a good estimate for the values of rheological properties of drilling fluids, such as viscosity, density, yield point, gel strength etc. In this work, an experiment was conducted on a special type of water-based mud which is called (Glydril), from ambient condition to high temperature and pressure. In this paper, we study the effects of constant pressure (500 psi) and high temperature up to (200°C).
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Ahmad et al. (2018) studied this question.
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