Abstract
Downhole oil/water separation and reinjection system (DOWS) is an important technical method to control the oil production cost and extend the oil well production period in the high water cut stage. The separator downhole can separate the oil and water by centrifugal force and replace the purified water into the specified formation to reduce the lifting water volume of produced fluids. A large number of experiments show that the sand content in well fluid has great influence on the separation efficiency of the separator. Based on the bidirectional coupling method of CFD-DEM, the force distribution of solid particles in a swirling flow field is numerically simulated in this paper. By studying the size and variation of the composite forces in the three directions of the X-axis, Y-axis, and Z-axis in the separation process of a cyclone separator, the force of the solid particles in the process of the spillway and the escape of the bottom flow during the process of cyclone separation are obtained. This research in this paper can provide technical support for the design of high-efficiency separator suitable for downhole sand containing conditions and provide guarantee for the popularization and application of reinjection production technology in the same well.
Copyright 2018, Shaanxi Petroleum Society.
This paper was prepared for presentation at the 2018 International Field Exploration and Development Conference in Xi’an, China, 18–20 September, 2018.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
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Acknowledgements
We would like to express our gratitude to the National High Technology Research and Development Program of China for financial support.
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Zhang, Y., Jiang, M., Zhang, Y., Xing, L., Chen, Y. (2020). Stress Analysis of Sand Particles in Separators in Downhole Oil/Water Separation and Reinjection System Based on Coupled CFD-DEM. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2018. IFEDC 2018. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-7127-1_124
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DOI: https://doi.org/10.1007/978-981-13-7127-1_124
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