论文详情
天然气水合物举升管气液分离过程数值模拟与方案优选
石油钻采工艺
2023年 45卷 第2期
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Title
Numerical simulation and optimization of gas-liquid separation process in gas hydrate lifting pipe
作者
王旱祥
任京文
于长录
车家琪
邓君宇
徐鸿志
刘延鑫
朱晓洋
Authors
WANG Hanxiang
REN Jingwen
YU Changlu
CHE Jiaqi
DENG Junyu
XU Hongzhi
LIU Yanxin
ZHU Xiaoyang
单位
中国石油大学(华东)
中国石油渤海钻探工程有限公司油气合作开发分公司
中国石油集团工程技术研究院有限公司
Organization
China University of Petroleum (East China), Qingdao 266500, Shandong, China
Oil & Gas Cooperation and Development Company, CNPC Bohai Drilling Engineering Co., Ltd., Tianjin 300300, China
CNPC Engineering Technology R&D Company Limited, Beijing 102206, China
摘要
为了提高天然气水合物气液分离效率,加快天然气水合物开采利用,以我国南海水合物开采工况为基础,结合天然气水合物开采工艺设计原则,采用流体力学数值模拟方法分别对轴流导叶式、管柱式、螺旋式3种气液分离装置进行数值模拟分析,重点研究了不同液相含量对3种气液分离装置气液分离效率的影响,并得到了3种气液分离装置的适用工况。研究结果表明,轴流导叶式、管柱式气液分离装置适用于液相流量较高、在分离空间内可形成液位的工况,螺旋式气液分离装置适用于液相含量较低且流量不大的工况。结合我国南海天然气水合物的含水状态,以液相含量10%、产气量30 000 m3/d为优选条件,以分离效率和压降为优化目标参数,确定螺旋式分离装置更适用于南海天然气水合物井下气液分离。该研究可为天然气水合物气液分离方案设计与优选提供指导。
Abstract
In order to improve the gas-liquid separation efficiency of natural gas hydrates and accelerate the recovery and utilization of natural gas hydrates, this research performed numerical simulation hydromechanics analysis of three types of gas-liquid separation devices, namely the axial guide vane, tubular and spiral separators. The numerical simulation was based on the working conditions of hydrate recovery in the South China Sea and the principles of gas hydrate recovery scheme design. The influences of liquid-phase content on the gas-liquid separation efficiency and the applicable working conditions of the three gas-liquid separators were clarified. The results showed that the axial guide vane and tubular gas-liquid separators are suitable for high liquid flow rates and liquid levels in the separation chamber, while the spiral gas-liquid separator is applicable to low liquid content and small flow rates. According to the water content of natural gas hydrates exploited in the South China Sea and the optimization conditions of liquid content of 10% and gas production of 30,000 m/d, the optimization was performed with the separation efficiency and pressure drop as the objective parameters. The spiral separator was found more suitable for downhole gas-liquid separation in natural gas hydrates wells. The findings of this research provide guidance for the design and optimization of gas-liquid separation schemes of natural gas hydrates recovery.
关键词:
天然气水合物;
开采;
气液比;
分离效率;
气液分离;
螺旋式分离装置;
Keywords:
natural gas hydrates;
recovery;
gas-liquid ratio;
separation efficiency;
gas-liquid separation;
spiral separator;
DOI
10.13639/j.odpt.2023.02.012