Flow regime behavior in the vicinity of the wellhead flowline junctions in subsea completions
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Two sets of experiments were performed to study the flow regime behavior in horizontal, gas-liquid two-phase-flow pipelines near the junction with a vertical pipe. In one set of experiments fluids were directly conducted into a horizontal flow loop, which consists of two pipes. In the other set of experiments, fluids were conducted into a 153-meter deep well through two different casings, allowing the mixtures to flow through the vertical pipe and then into the horizontal flow loop. The flow regime behavior was studied for a wide range of air and water flow rates. It was found that the flow regime behavior associated with each set of experiments was quite different and the flows in the small horizontal pipe were quite different from the flows in the large horizontal pipe. From these results, the influence of vertical two-phase flow on subsequent horizontal flow regimes near simulated well head-pipeline junction was determined.
