大落差原油管道投产排水过程研究

doi:10.11885/j.issn.1674-5086.2018.04.18.01

西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (1): 156-164.DOI: 10.11885/j.issn.1674-5086.2018.04.18.01

大落差原油管道投产排水过程研究

刘恩斌¹, 马茜¹, 黎春², 向敏², 黄立宇³

1. 西南石油大学石油与天然气工程学院, 四川成都 610500;
2. 中国石油北京油气调控中心, 北京东城 100007;
3. 中国石油西南管道公司成都分控中心, 四川成都 610213

收稿日期:2018-04-18 出版日期:2019-02-10 发布日期:2019-02-10
通讯作者: 刘恩斌,E-mail:sunriselebpsb@163.com
作者简介:刘恩斌,1980年生,男,汉族,四川遂宁人,教授,主要从事油气管网仿真与优化技术、瞬变流、计算流体力学等方面的科研教学工作。E-mail:sunriselebpsb@163.com;马茜,1994年生,女,汉族,四川营山人,硕士研究生,主要从事大落差原油管道投产关键技术方面的研究工作。E-mail:maxi940826@126.com;黎春,1984年生,男,汉族,北京昌平人,工程师,主要从事油气管网调控方面的研究工作。E-mail:li_chun@Petrochina.com.cn;向敏,1982年生,女,汉族,湖北松滋人,工程师,主要从事油气管网调控方面的研究工作。E-mail:xiangmin2014@petrochina.com.cn;黄立宇,1973年生,男,汉族,辽宁北宁人,工程师,主要从事油气管网调控方面的研究。E-mail:lyhuang@petrochina.com.cn
基金资助:
国家安全生产监督管理总局项目（sichuan-0013-2016AQ）；四川省应用基础研究项目（19YYJC1078）

Analysis of Drainage Process for Crude Oil Production Using Pipeline with Large Drop-in-height

LIU Enbin¹, MA Xi¹, LI Chun², XIANG Min², HUANG Liyu³

1. School of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Beijing Oil and Gas Pipeline Control Center, PetroChina, Dongcheng, Beijing 100007, China;
3. Southwest Pipeline Company, PetroChina, Chengdu, Sichuan 610213, China

Received:2018-04-18 Online:2019-02-10 Published:2019-02-10

摘要/Abstract

摘要： 针对最大相对高差达1 432.64 m且含大落差“U”型管段的某原油管线在油顶水投产过程中，原油与水的密度差导致油头行进停滞的问题，提出了在油水界面点附近的阀室，利用压力泄放阀排水泄压的解决方式，基于OLGA多相流瞬态模拟方法，以实际情况为例，对大落差管段的气顶水排水过程进行仿真研究。以泄流孔径为变量，重点研究了流量、压力随时间的变化规律，得到一系列可选泄流孔径及其相应的排水量、流量、压力等随时间变化的关系曲线等。结果表明，选定管段（容量约为6 376.98 m³）最大排水量可达3 375 m³，并从经济、安全、有效3个方面分析选出最佳泄流孔径为90～110 mm，与实际情况基本吻合，为解决投产过程中出现类似的异常工况提供实施依据。

关键词: 大落差, 输油管道, U型管段, 排水量, 泄流孔径

Abstract: For oil-after-water commissioning that involves a maximum drop-in-height of 1 432.64 m and uses a crude oil pipeline containing a U-shaped section with a large drop-in-height, the density difference between crude oil and water leads to stagnation issues in the oil head. To resolve this problem, we proposed to drain the pipeline and release pressure using a pressure relief valve installed in the valve chamber near the oil-water interfacial point. Based on the OLGA multiphase flow transient simulation method and taking the actual situation as an example, we simulated the gas-driven water drainage process in the pipe section with a large drop-in-height. Specifically, the simulation focused on analyzing the change in flow rate and pressure over time with varying diameters of the leakage aperture. A series of available sizes of the leakage apertures and corresponding changes in the displacement, flow, and pressure over time were obtained from the simulation. The results demonstrate that the maximum displacement in the selected pipe section (capacity≈6 367.98 m³) can reach 3 375 m³. From the perspectives of economy, safety and effectiveness, the best leakage aperture range was found to be 90～110 mm. This number was consistent with that in the actual situation. This study provides a practical basis for alleviating similar abnormal conditions in real production processes.

Key words: large drop-in-height, oil pipeline, U-shaped pipe section, water displacement, diameter of leakage aperture

中图分类号:

TE832

刘恩斌, 马茜, 黎春, 向敏, 黄立宇. 大落差原油管道投产排水过程研究[J]. 西南石油大学学报(自然科学版), 2019, 41(1): 156-164.

LIU Enbin, MA Xi, LI Chun, XIANG Min, HUANG Liyu. Analysis of Drainage Process for Crude Oil Production Using Pipeline with Large Drop-in-height[J]. 西南石油大学学报(自然科学版), 2019, 41(1): 156-164.

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大落差原油管道投产排水过程研究

Analysis of Drainage Process for Crude Oil Production Using Pipeline with Large Drop-in-height

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