水合物降压开采储层出砂与渗透率影响因素研究

加瑞; 郝岱恒; 乔小利

doi:10.20174/j.JUSE.2026.03.16

地下空间与工程学报 >

2026 , Vol. 22 >Issue 3: 910 - 919

DOI: https://doi.org/10.20174/j.JUSE.2026.03.16

理论与试验研究

水合物降压开采储层出砂与渗透率影响因素研究

加瑞 ,
郝岱恒 ,
乔小利

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1.天津大学建筑工程学院,天津 300350;
2.天津大学滨海土木工程结构与安全教育部重点实验室,天津 300350;
3.交通运输部天津水运工程科学研究院,天津 300456

加瑞(1982—),男,山西运城人,博士,副教授,主要从事岩土工程、地下工程等领域的教学与科研工作。E-mail:jiarui@tju.edu.cn

收稿日期: 2025-11-18

网络出版日期: 2026-06-23

基金资助

国家自然科学基金(52378362);天津市科技计划项目(21JCYBJC00380)

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Study on the Influencing Factors of Reservoir Sand Production and Permeability during Hydrate Depressurization Exploitation

Jia Rui ,
Hao Daiheng ,
Qiao Xiaoli

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1. School of Civil Engineering, Tianjin University, Tianjin 300350, P. R. China;
2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300350, P. R. China;
3. Tianjin Research Institute for Water Transport Engineering, Tianjin 300456, P. R. China

Received date: 2025-11-18

Online published: 2026-06-23

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摘要

储层出砂是制约天然气水合物安全开采的关键问题,而储层渗透率是影响水合物开采产能的关键参数。通过室内模型试验研究了储层颗粒级配、水合物饱和度、降压幅度和防砂层孔径对水合物降压开采储层出砂和渗透率的影响,并分析了储层出砂量与储层渗透率变化之间的相关性。结果表明:(1)黏粒含量越少、降压幅度越大、防砂层孔径越大,储层出砂量越多;(2)在防砂层孔径相同的情况下,储层出砂量与水的平均流量基本成线性关系;(3)储层渗透率均随时间逐渐增大,最后逐渐趋于稳定;水合物饱和度越大、黏粒含量越多,开始时的渗透率越小;(4)降压幅度越大、防砂层孔径越大,结束与开始时渗透率的比值越大;(5)在水合物饱和度相同的情况下,储层出砂量越多,储层渗透率的增大量相对越大;(6)在水合物饱和度和储层颗粒级配相同的情况下,储层出砂量越大,储层渗透率的增大率相对越大。

关键词： 储层出砂; 储层渗透率; 天然气水合物; 四氢呋喃; 降压开采

本文引用格式

加瑞 , 郝岱恒 , 乔小利 . 水合物降压开采储层出砂与渗透率影响因素研究[J]. 地下空间与工程学报, 2026 , 22(3) : 910 -919 . DOI: 10.20174/j.JUSE.2026.03.16

Abstract

Sand production in the reservoir is a key issue restricting the safe exploitation of natural gas hydrate, and reservoir permeability is a key parameter affecting the production capacity of hydrate exploitation. The effects of particle size distribution of reservoir, hydrate saturation, depressurization amplitude and pore size of sand prevention layer on reservoir sand production and permeability during hydrate depressurization exploitation were investigated by laboratory model tests. The correlation between the reservoir sand production and change in reservoir permeability was analyzed. The results show that: (1) Factors influencing reservoir sand production: the lower the clay content, the larger the depressurization amplitude, and the greater the pore size of sand prevention layer were, the larger the amount of reservoir sand production. With the same pore size of sand prevention layer, the amount of reservoir sand production has approximately a linear relationship with the average flow rate of water. (2) Factors influencing reservoir permeability: the reservoir permeability generally increased with time, and finally gradually tended to a stable value. The greater the hydrate saturation, and the greater the clay content were, the smaller the initial value of permeability. The greater the depressurization amplitude, and the larger the pore size of sand prevention layer were, the greater the ratio of final value to initial value of permeability. (3) The correlation between the sand production and variation in permeability: with the same hydrate saturation, the more the amount of reservoir sand production was, the relatively greater the increase amount of reservoir permeability. With the same hydrate saturation and particle size distribution of reservoir, the more the amount of reservoir sand production was, the relatively greater the increase rate of reservoir permeability.

Key words： reservoir sand production; reservoir permeability; gas hydrate; tetrahydrofuran; depressurization exploitation

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