A Study on the Effect of Fluid Properties and Watercut on Liquid Carry-Over in Gas-Liquid Cylindrical Cyclone Compact Separators

Author:

Kolla Srinivas Swaroop1,Mohan Ram S.2,Shoham Ovadia3

Affiliation:

1. Mem. ASME Department of Mechanical Engineering, The University of Tulsa, Tulsa, OK 74104 e-mail:

2. Fellow ASME Department of Mechanical Engineering, The University of Tulsa, Tulsa, OK 74104 e-mail:

3. McDougall School of Petroleum Engineering, The University of Tulsa, Tulsa, OK 74104 e-mail:

Abstract

Prediction of the operational envelope (OE-limited range of gas and liquid velocities) for liquid carry-over is essential for the optimized performance of gas-liquid cylindrical cyclone (GLCC©) compact separators. This study presents for the first time the operational envelop for three-phase gas-oil-water flow incorporating pressure and level control configurations. A series of experiments were conducted to evaluate the performance of a 3 in. diameter GLCC in terms of OE for liquid carry-over. Experiments were carried out at different watercuts ranging from 0% to 100% utilizing water and two different types of mineral oils namely: light oil and heavy oil with specific gravities of 0.859 and 0.937, respectively. The liquid level was controlled at 6 in. below the GLCC inlet for all the experimental flow conditions. The experimental results indicate that OE for liquid carry-over for three-phase flow is very sensitive to watercut. As the watercut reduces, the OE for liquid carry-over reduces monotonically. Also, the OE for heavy oil (indicated by higher viscosity) reduces as compared to light oil. The superficial gas velocity required to create an annular mist flow in the upper part of the GLCC increases with the increase of watercut and viscosity.

Publisher

ASME International

Subject

Mechanical Engineering

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