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Study Correlates Hydrate Blockage Risk and Gas/Liquid Flow Pattern in Horizontal Pipelines

Current research into the risk of hydrate formation and blockage in pipelines is limited to prediction of hydrate formation. However, hydrate generation often does not lead to flow barriers. Hydrate growth and deposition rates are important to hydrate generation as a blockage risk. To help solve the problem of flow assurance in horizontal gas/liquid pipelines, this paper analyzes the risk of hydrate formation and blockage, aiming at various gas/liquid flow patterns and considering the phase distribution and interface distribution characteristics of different flow patterns.

Introduction

Hydrate blockage risk in transportation pipelines is one of the most important topics in the study of flow assurance. Large-scale natural gas development, for example, requires construction of large-scale gathering and transmission pipeline networks. Natural gas is often transported by horizontal or small inclined pipelines, and water generation and flow are often present in natural gas pipelines, which undoubtedly increases the risk of hydrate formation and blockage. When gas and water exist at the same time, there will often be a variety of gas/liquid flow patterns in pipelines, and different flow patterns will have different risk of hydrate formation and blockage. To avoid hydrate risk, it is necessary to study the correlation between hydrate generation blockage risk and gas/liquid flow pattern.

This article, written by JPT Technology Editor Judy Feder, contains highlights of paper Paper SPE 197534, “Study on the Correlation Between Hydrate Formation-Blockage Risk and Gas/Liquid Flow Pattern in Horizontal Pipelines,” by Wenyuan Liu, Jinqiu Hu, and Fengrui Sun, China University of Petroleum-Beijing, et al., prepared for the 2019 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 9–12 November. The paper has not been peer reviewed.
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Study Correlates Hydrate Blockage Risk and Gas/Liquid Flow Pattern in Horizontal Pipelines

01 April 2020

Volume: 72 | Issue: 4

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