分层流管道黏壁温度计算模型的建立与验证

doi:10.11885/j.issn.1674-5086.2022.11.03.02

摘要/Abstract

摘要： 高含水集输管道低温输送工艺可有效降低能源和经济损耗，但是随着气驱采油的推广，很多集输管道内的流体为油、气、水三相共存的状态。为了探究气体对凝油在壁面黏附现象的影响，利用自行研发的可承压搅拌釜装置对不同条件下凝油在壁面上的黏附质量进行了测量，发现溶解在原油中的气体可明显减小凝油的黏附量，但是质量突增时对应的温度点没有改变；随后在油田现场开展了高含水集输管道注气实验，发现随着管道内气油比的增加，最低进间温度从29 ℃降低至26 ℃，表明气体的存在改善了原油的流动性；最后，以“壁面剪切应力=屈服应力×系数”为理论依据，建立了可用于分层流集输管道的黏壁温度计算模型，经验证模型应用效果良好。

关键词: 溶气原油, 低温集输, 黏壁温度, 注气实验, 分层流

Abstract: Low temperature transportation technology can effectively reduce energy and economic loss for high-water-cut gathering and transportation pipelines. However, with the popularization of gas flooding, the fluids in many gathering pipelines are in the state of three-phase of oil, gas and water. In order to explore the effect of gas on the adhesion of gelled oil on the wall, a self-developed pressure-bearing stirring tank is used to measure the adhesion mass of gelled oil on the wall under different conditions. It is found that the gas dissolved in crude oil can significantly reduce the adhesion of gelled oil, while the temperature does not change with corresponding mass surge; subsequently, a gas injection test is carried out on the high water-cut gathering and transportation pipeline on site, and it shows that with the increase of the gas-oil ratio in the pipeline, the minimum inlet temperature decreases from 29 ℃ to 26 ℃, indicating that the presence of gas improves the fluidity of crude oil; finally, based on the theoretical basis of " wall shear stress=yield stress × coefficient", a stick-wall temperature calculation model that can be used in stratified flow gathering and transportation pipelines is established, and the verification shows that the model has a good calculation effect.

Key words: crude oil with dissolved gas, low temperature gathering and transportation, wall sticking occurrence temperature, gas injection test, stratified flow

中图分类号:

TE832

程显闻, 熊建华, 黄启玉, 田家兴, 于乐. 分层流管道黏壁温度计算模型的建立与验证[J]. 西南石油大学学报(自然科学版), 2025, 47(2): 137-150.

CHENG Xianwen, XIONG Jianhua, HUANG Qiyu, TIAN Jiaxing, YU Le. Establishment and Verification of the Wall Sticking Occurrence Temperature Calculation Model of Stratified Flow Pipeline[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(2): 137-150.

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