摘要
本文使用OLGA瞬态多相流软件对深水回接天然气凝析液管线进行清管瞬态模拟，模拟过程中考虑了到达浅水平台压力、天然气输量、从浅水平台来的天然气反输量等因素对浅水平台分离器操作的影响。模拟结果表明：随着井流物输量的增大，清管后天然气重新达到稳定的时间就越短，清管周期就越短；随着井流物输量的降低，进入分离器中天然气和凝析液的“断流时间”越长，清管后天然气重新达到稳定的时间越长。在生产后期，采用反输干燥天然气和适当降低到达浅水平台的压力，有效降低管线的积液量和水下管汇压力，减少对浅水平台上天然气和乙二醇的补给量。无论采取何种措施，在清管期间，进入浅水平台分离器的液体流量都大于分离器的处理能力365m^3／h，需要考虑让超过分离器允许处理量的那部分液体进入闭排系统。
In this paper, OLGA transient multiphase software is used to the simulation of pigging transient flow. Characteristics of tieback flow lines for deepwater gas field in the South China Sea are described, with effects, such as arriving offshore pressure, well stream gas flow rate and recycle dry gas from offshore platform, on offshore platform separator operation considered. Stable time period of gas and pigging cycle is shorter, when stream gas flow rate in the well is larger. Starvation time period and stable time of gas is longer, when well stream and gas flow rate is little. In advanced stage of production, properly reducing transmission line pressure to shallow platform and keeping mixing gas flow rate of recycle gas and well stream can reduce the volume of total liquid, the length of max slug, starvation time period of gas and liquid, and reduce the supply of gas and additional MEG from other producers. During pigging, liquid flow into CEP separator is more than 365m^3/hr in all production periods, while measured liquid content is more than 365m^3/hr.
出处
《中国造船》
EI
CSCD
北大核心
2013年第A02期466-473,共8页
Shipbuilding of China
关键词
清管模拟
流动安全
清管周期
OLGA软件
分离器
积液量
pigging simulation
flow assurance
pigging cycle
OLGA software
separator
liquid inventory
作者简介
喻西崇男，1973年出生，博士。主要从事深水流动安全和天然气水合物方面的设计和研究工作。
萧巍女，1973年出生。主要从事油气储运方面的研究工作。
邬亚玲女，1974年出生。主要从事轻烃回收方面的设计和研究工作。
