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Mitigation of asphaltene deposition by Re-injection of dead oil
Fluid Phase Equilibria ( IF 2.6 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.fluid.2020.112552
A.T. Khaleel , M.I.L. Abutaqiya , C.J. Sisco , F.M. Vargas

Abstract Asphaltene deposition is a common flow assurance problem in the oil and gas industry. During oil production, changes in pressure, temperature, and composition may induce precipitation as asphaltenes become unstable in the oil. Precipitated asphaltenes can then deposit on the inner walls of the production tubing and restrict or even completely block the flow of oil. In this work, we propose a novel chemical-free technique to mitigate asphaltene deposition, where dead oil collected at the surface is recycled to reduce asphaltene precipitation. The stabilization effect of the dead oil reinjection is investigated from a thermodynamic perspective using PC-SAFT EOS. Four crude oils from the literature are investigated, and it is found that the asphaltene unstable region and precipitated amounts reduce significantly upon reinjection of dead oil. The simulation results suggest that, depending on the amount of reinjection and the oil characteristics, asphaltene precipitation can be eliminated by simply reinjecting dead oil.

中文翻译:

回注死油减轻沥青质沉积

摘要 沥青质沉积是油气行业常见的流动保障问题。在石油生产过程中,压力、温度和成分的变化可能会导致沉淀,因为石油中的沥青质变得不稳定。然后,沉淀的沥青质会沉积在生产油管的内壁上,从而限制甚至完全阻止油的流动。在这项工作中,我们提出了一种新的无化学物质技术来减轻沥青质沉积,其中回收在地表收集的死油以减少沥青质沉淀。使用 PC-SAFT EOS 从热力学角度研究死油回注的稳定效果。研究了文献中的四种原油,发现回注死油后沥青质不稳定区和沉淀量显着减少。
更新日期:2020-06-01
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