Numerical modeling of cuttings transport with foam in inclined wells.

摘要

In this study, a 1-D transient state mechanistic model of cuttings transport with foam in inclined wells has been developed. The model was solved numerically to predict the optimum foam flow rate (liquid and gas rate) and rheological properties that would maximize cuttings transport efficiency in inclined well.; The model predictions of total pressure drops were compared to the results from full scale low pressure ambient temperature flow loop experiments conducted by Tulsa University Drilling Research program. The model predictions of total pressure drop were 4 to 21% lower than the experimental result.; A detailed sensitivity analysis of the effect of gas and liquid flowing rates, drilling rate, foam rheological properties, borehole geometry, wellbore inclination, back pressure and the rate of gas and liquid influx from the reservoir on the cuttings transport efficiency in inclined wells was presented.