Análise experimental de escoamento líquido-sólido para o controle de fuga de fluido em canal fraturado

Abstract

The natural occurrence of faults in the rock formation or even those induced by the drilling process can cause drilling fluid migration towards the formation. To control the phenomenon of loss of fluid various techniques are used. One is the use of lost circulation materials. In this work, a study experimentally the liquid-solid flow in the fracturated channel and the formation of bed of particles within the fracture is proposed. To this end, an experimental apparatus is designed, built and instrumented at CERNN-UTFPR dependencies in order to investigate the proposed issue. To characterize the process of bed formation within the fracture, pressure gradient in the channel, flow rate through the channel and the bed formation (height, length and starting position) are investigated over time. The results show the effect of varying the Reynolds number, concentration of particles, particulate material and the initial fluid loss flow by the fracture over the formation of particle bed. With the analysis of the results it is sought to verify the importance of control methods in the event of loss of fluid through fractures in the set well-formation, and the injection of particulate matter as a possible alternative to control the problem. From the results, it is concluded that increasing the concentration of particles, decreasing the flow Reynolds number in the channel, increasing fluid loss flow through the fracture and the use of particles of higher specific gravity contribute to a bed formation with greater height and length.