Petroleum Science >2013,??Issue 1:??97-105 DOI: https://doi.org/10.1007/s12182-013-0255-8
A study of hydrate plug formation in a subsea natural gas pipeline using a novel highpressure flow loop Open?Access
文章信息
Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China;Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China;Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China;China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China;CNPC Tubular Goods Research Institute, Xi’an, Shaanxi 710065, China;Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China
文章摘要
onshore processing facility is a subsea wet gas pipeline exposed to high pressure and low temperature
for a long distance. Blockages in the pipeline occur occasionally. To maintain the natural gas flow in
the pipeline, we proposed a method for analyzing blockages and ascribed them to the hydrate formation
and agglomeration. A new high-pressure flow loop was developed to investigate hydrate plug formation
and hydrate particle size, using a mixture of diesel oil, water, and natural gas as experimental fluids. The
influences of pressure and initial flow rate were also studied. Experimental results indicated that when the
flow rate was below 850 kg/h, gas hydrates would form and then plug the pipeline, even at a low water
content (10%) of a water/oil emulsion. Furthermore, some practical suggestions were made for daily
management of the subsea pipeline.
关键词
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Natural gas hydrate, blockage, flow assurance, high-pressure loop, water cut, flow rate