A study of hydrate plug formation in a subsea natural gas pipeline using a novel highpressure flow loop |
| |
Authors: | Li Wenqing Gong Jing Lü Xiaofang Zhao Jiankui Feng Yaorong Yu Da |
| |
Affiliation: | 1. Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China 2. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China 3. CNPC Tubular Goods Research Institute, Xi'an, Shaanxi 710065, China |
| |
Abstract: | The natural gas pipeline from Platform QK18-1 in the southwest of Bohai Bay to the 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. |
| |
Keywords: | Natural gas hydrate blockage flow assurance high-pressure loop water cut flow rate |
本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录! |
| 点击此处可从《石油科学(英文版)》浏览原始摘要信息 |
|
点击此处可从《石油科学(英文版)》下载全文 |
|