«Onshore and offshore oil and gas well construction»

Simulation of curved well flushing in "ANSYS Fluent" environment

UDC: 622.244
DOI: -

Authors:

¹ Ukhta State Technical University, Ukhta, Russia
² St. Petersburg State University of Architecture and Civil Engineering, St. Petersburg, Russia

Keywords: deviated wells, flushing fluid, numerical modeling, field testing, ANSYS Fluent

Annotation:

The authors of the article present the results of numerical modeling of the process of flushing curved wells using the "ANSYS Fluent" software package based on field testing data. The fields of distribution of static pressure, flow velocity and dynamic viscosity along the length and cross-section of the annular channel as well as changes of the solid phase concentration, were obtained. Taking into account the unsystematic maintenance of high mechanical speed in the drilling interval in the productive formation of wells with a complex spatial profile, there exist complications associated with the process of such wells flushing. An integrated approach, which consists in establishing the most appropriate rheological model of the flow of the flushing fluid, helps optimizing the flushing technology for directional and horizontal wells, designed to reduce the risks of excess sludge accumulation in them. The software package presented in the article can serve as an integral component of both design activities and operational adjustments of flushing technology and flushing fluids during wells construction.

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