多步分解法初步研究石英砂中甲烷水合物p-T稳定条件

现代地质 ›› 2010, Vol. 24 ›› Issue (3): 638-642.

• 天然气水合物专辑：实验研究 • 上一篇

多步分解法初步研究石英砂中甲烷水合物p-T稳定条件

孙始财^1,2,业渝光²,刘昌岭²,谭允祯¹,孟庆国²,马燕²,相凤奎^1,2

1.山东科技大学土木建筑学院山东省土木工程防灾减灾重点实验室，山东青岛266510;
2.青岛海洋地质研究所，山东青岛266071

出版日期:2010-06-21 发布日期:2010-08-17
作者简介:孙始财，男, 博士研究生, 1975年出生，安全技术及工程专业，主要从事天然气水合物研究。 Email: qdsunsc@163.com
基金资助:
科技部国家重点基础研究发展计划项目（2009CB219503）；国家“海域天然气水合物资源调查与评价”专项项目(GZH200200202)；山东省自然科学基金项目（ZR2009FQ017）。

Preliminary Experiment of Stable p-T Conditions of Methane Hydrate in Quartz Sand with Multistep Dissociation Method

SUN Shi-Cai^1,2, YE Yu-Guang², LIU Chang-Ling², TAN Yun-Zhen¹, MENG Qing-Guo²

1.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture,
Shandong University of Science and Technology, Qingdao, Shandong266510, China;
2.Qingdao Institute of Marine Geology, Qingdao, Shandong266071,China

Online:2010-06-21 Published:2010-08-17

摘要/Abstract

摘要：

设计加工了一套研究海底沉积物水合物稳定条件实验装置，采用多步加热分解的方法对不同孔隙度的石英砂沉积物甲烷水合物相态平衡点(p-T稳定条件)进行了初步研究。为校验实验装置和实验方法，首先对甲烷水合物在十二烷基硫酸钠(SDS)溶液中的生成和分解过程进行了研究，获得的实验数据与文献数据吻合得很好。在此基础上，以4种不同粒径(96～180 μm、180～380 μm、212～380 μm和380～830 μm)的石英砂为介质，分别研究了甲烷水合物的p-T稳定条件。结果表明，实验测得的数据与纯水溶液中的结果基本一致，说明在实验所用的不同粒径石英砂构成的孔隙尺度内，毛细管作用对水合物相态点的影响可以忽略。

关键词: 多步分解法, 石英砂, 甲烷水合物, p-T稳定条件

Abstract:

An experimental setup used to study the stability conditions of marine hydrate is established, and a preliminary investigation of methane hydrate phase equilibrium (p-T stability conditions) in quartz sand with different pore sizes is developed with multi-step dissociation method. Firstly, the formation and decomposition of methane hydrate in the sodium dodecyl sulfate (SDS) solution are performed to verify the reliability and efficiency of the setup and experimental methods. The obtained experimental data agree well with those from the literatures. Secondly，the stable p-T conditions of methane hydrate in quartz sand sediment and SDS solution are carried out. The particle sizes of quartz sand are 96-180 μm, 180-380 μm, 212-380 μm, and 380-830 μm, respectively. The measured stable p-T conditions of methane hydrate in quartz with various sizes are well consistent with those in pure water solution, suggesting that the pore capillary effect of quartz sand sediment can be ignored.

Key words: multi-step dissociation method, quartz sand, methane hydrate, stable p-T condition

中图分类号:

P736.3

孙始财, 业渝光, 刘昌岭, 谭允祯, 孟庆国. 多步分解法初步研究石英砂中甲烷水合物p-T稳定条件[J]. 现代地质, 2010, 24(3): 638-642.

SUN Shi-Cai, YE Yu-Guang, LIU Chang-Ling, TAN Yun-Zhen, MENG Qing-Guo. Preliminary Experiment of Stable p-T Conditions of Methane Hydrate in Quartz Sand with Multistep Dissociation Method[J]. Geoscience, 2010, 24(3): 638-642.

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多步分解法初步研究石英砂中甲烷水合物p-T稳定条件

Preliminary Experiment of Stable p-T Conditions of Methane Hydrate in Quartz Sand with Multistep Dissociation Method

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