Estudio de la sedimentación estática y dinámica de la barita en fluidos de perforación base agua de densidades intermedias

Abstract

Barite sedimentation is a phenomenon that generates some problems within the drilling such as well-control problems stuck pipe among others. In order to analyze this anomaly, a study was carried out on the sedimentation of barite in water-based drilling fluids of intermediate densities of Ecuadorian east, for this laboratory tests were carried out, with the purpose of assessing the settlement behavior by dynamic and static conditions. To evaluate the static sedimentation, a transparent tube was built to scale (100 cm) with 4 valves through which the fluid samples were collected for later analysis. On the other hand, the viscometer method (VST) was used for dynamic settlement. The results generated in the laboratory allowed us to conclude that the phenomenon of settlement of barite in water-based drilling muds of intermediate densities (9-11 lpg) was minimal since in dynamic conditions the fluids presented a sedimentation difference of less than 1 lpg, while in static conditions , the settlement factor remained within the acceptable range (≤ 0.53). The results of the drilling fluids studied are due to fluid properties and well geometry (0 °).