基于颗粒堆积理论的管壁水合物沉积层力学特性研究

doi:10.16085/j.issn.1000-6613.2017-1952

化工进展 ›› 2018, Vol. 37 ›› Issue (09): 3370-3378.DOI: 10.16085/j.issn.1000-6613.2017-1952

基于颗粒堆积理论的管壁水合物沉积层力学特性研究

宋光春¹, 李玉星¹, 王武昌¹, 姜凯¹, 施政灼¹, 姚淑鹏¹, 魏丁², 史培玉³

1 山东省油气储运安全省级重点实验室, 中国石油大学(华东), 山东青岛 266580;
2 泰能天然气有限公司, 山东青岛 266580;
3 中国石油化工股份有限公司胜利油田分公司, 山东东营 257000

收稿日期:2017-09-18 修回日期:2017-11-13 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: 李玉星,博士,教授,主要从事油气储运工程方面的研究和教学工作。
作者简介:宋光春(1992-),男,博士研究生,主要从事深水流动安全保障方向研究。E-mail:UpcNGH_sgc@163.com。
基金资助:
山东省自然科学基金（ZR2017MEE057）、中央高校基本科研业务费专项（14CX02207A，17CX06017，17CX05006）及中国石油大学（华东）研究生创新工程（YCX2017062）项目。

Investigation on the mechanical properties of pipe wall hydrate deposits based on particle packing theory

SONG Guangchun¹, LI Yuxing¹, WANG Wuchang¹, JIANG Kai¹, SHI Zhengzhuo¹, YAO Shupeng¹, WEI Ding², SHI Peiyu³

1 Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, China;
2 Taineng Natural Gas Co. Ltd., Qingdao 266580, Shandong, China;
3 Shengli Oilfield Branch Company, Sinopec Group, Dongying 257000, Shandong, China

Received:2017-09-18 Revised:2017-11-13 Online:2018-09-05 Published:2018-09-05

摘要/Abstract

摘要： 管壁水合物沉积层的稳定性与管壁水合物沉积层的力学特性密切相关，研究管壁水合物沉积层的力学特性对深水流动安全保障具有重要意义。为研究管壁水合物沉积层的力学特性，假设沉积层内所有水合物均为大小相同的球形颗粒，且沉积层是由多层水合物颗粒相互堆积而成。根据水合物颗粒堆积方式的不同，将管壁水合物沉积层分为简单立方堆积型、六方堆积型、复六方堆积型、四面体堆积型、角锥堆积型和随意堆积型6类。不同类型的水合物沉积层对应有不同的空隙率和层间受力特性，以此为基础，分别计算分析了各类水合物沉积层的压缩波速、剪切波速、泊松比、弹性模量、抗拉强度，并依据摩尔——库仑强度准则给出了各类管壁水合物沉积层的抗剪强度。同时，计算分析了退火作用对管壁水合物沉积层抗拉强度和抗剪强度的影响。本文研究成果可为油气管道水合物防治技术的发展提供理论支持。

关键词: 管道, 水合物, 沉积层, 颗粒堆积, 力学特性

Abstract: The stability of pipe wall hydrate deposits is closely related to its mechanical properties. Investigation on the mechanical properties of pipe wall hydrate deposits is of great importance to deep water flow assurance. In order to study the mechanical properties of pipe wall hydrate deposits, it is assumed that the deposits consist of several layers of hydrate particles with a same particle diameter. According to the ways in which hydrate particles are acclimated, the pipe wall hydrate deposits can be divided into the following types, simple cubic packing deposit, orthorhombic packing deposit, rhombohedral packing deposit, tetrahedral packing deposit, pyramid packing deposit and random packing deposit. Different deposit types correspond to different porosities and interlayer mechanical behaviors. Based on this, compressional wave velocity, shear wave velocity, Poissons ratio, modulus of elasticity and tensile strength of different pipe wall hydrate deposits are calculated. In addition, the shear strength of pipe wall hydrate deposits is given according to Mohr-Coulumb failure criterion. The effect of annealing on tensile strength and shear strength is also analyzed. The results and conclusions in this paper can provide theoretical supports for the development of hydrate management strategies in oil and gas pipelines.

Key words: pipeline, hydrate, deposit, particle packing, mechanical property

中图分类号:

TE88

宋光春, 李玉星, 王武昌, 姜凯, 施政灼, 姚淑鹏, 魏丁, 史培玉. 基于颗粒堆积理论的管壁水合物沉积层力学特性研究[J]. 化工进展, 2018, 37(09): 3370-3378.

SONG Guangchun, LI Yuxing, WANG Wuchang, JIANG Kai, SHI Zhengzhuo, YAO Shupeng, WEI Ding, SHI Peiyu. Investigation on the mechanical properties of pipe wall hydrate deposits based on particle packing theory[J]. Chemical Industry and Engineering Progress, 2018, 37(09): 3370-3378.

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基于颗粒堆积理论的管壁水合物沉积层力学特性研究

Investigation on the mechanical properties of pipe wall hydrate deposits based on particle packing theory

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