Drilling and downhole tools must be designed for maximum reliability. As downhole pressures and temperatures increase — along with drill lengths — tool performance must be optimized for precise positioning and control, designed to operate in more corrosive environments at high pressure and high temperature, and be able to withstand fatigue, vibration and thermal stresses.
During drilling activities, useful information can be extracted from the formation to help gather information about porosity, permeability and rock characteristics — leading to better characterization of the reservoir to support faster, more efficient drilling and better production. Measurement while drilling (MWD) and logging while drilling (LWD) tools have helped to increase yields and profitability.
A common difficulty in simulating complex fluid flow problems is that some geometries can not be well-represented using a single, contiguous mesh. In many cases, different geometrical features are best represented by different mesh types. Preparing this mesh can be time consuming and complicated. Additionally, the large, poorly structured meshes that result can take excessive time to solve and can result in reduced accuracy.