天然气水合物降压开采出砂定量预测新模型

doi:10.7623/syxb2019S2016

石油学报 ›› 2019, Vol. 40 ›› Issue (S2): 160-167.DOI: 10.7623/syxb2019S2016

天然气水合物降压开采出砂定量预测新模型

李占东^1,2, 刘建辉¹, 李中³, 李阳⁴, 张海翔^1,2, 王殿举^1,2, 庞鸿¹

1. 东北石油大学海洋油气工程学院黑龙江大庆 163318;
2. 黑龙江省天然气水合物高效开发重点实验室黑龙江大庆 163318;
3. 中海石油(中国)有限公司湛江分公司广东湛江 524057;
4. 大庆职业学院黑龙江大庆 163255

收稿日期:2019-10-08 修回日期:2019-12-09 出版日期:2019-12-25 发布日期:2020-04-24
通讯作者: 李中,男,1972年9月生,1994年毕业于江汉石油学院,2011年获中国石油大学(华东)硕士学位,现为中海石油(中国)有限公司湛江分公司教授级高级工程师,主要从事海洋油气钻井的研究和管理工作。Email:lizhong@cnooc.com.cn
作者简介:李占东,男,1979年2月生,2003年获大庆石油学院学士学位,2009年获大庆石油学院博士学位,现为东北石油大学副教授,主要从事水合物开采科研工作。Email:13644593771@163.com
基金资助:
国家重点研发计划项目"双梯度钻井系统关键技术研究及应用"（2018YFC0310200）和黑龙江省省属高校科技成果研发项目（TSTAU-R2018018）资助。

A new model for quantitative prediction of sand production during natural gas hydrate exploitation by depressurization recovery

Li Zhandong^1,2, Liu Jianhui¹, Li Zhong³, Li Yang⁴, Zhang Haixiang^1,2, Wang Dianju^1,2, Pang Hong¹

1. College of Offshore Oil and Gas Engineering, Northeast Petroleum University, Heilongjiang Daqing 163318, China;
2. Heilongjiang Key Laboratory of Gas Hydrate Efficient Development, Heilongjiang Daqing 163318, China;
3. Zhanjiang Branch, CNOOC China Limited, Guangdong Zhanjiang 524057, China;
4. Daqing Vocational College, Heilongjiang Daqing 163255, China

Received:2019-10-08 Revised:2019-12-09 Online:2019-12-25 Published:2020-04-24

摘要/Abstract

摘要：

国内外天然气水合物试采经验表明，出砂问题是制约水合物资源有效开发的关键因素。从地层流体渗流角度出发，结合岩石力学理论，通过在出砂半径内对出砂量与产气量关系的推导，建立了天然气水合物降压开采出砂定量预测新模型。模型在确定地层和流体等参数情况下，得出地层出砂量与产气量呈正相关关系，因此确定水合物降压开采产气量就可以定量预测对应的出砂量。结合岩石颗粒出砂模拟，描述了不同时期水合物分解过程颗粒出砂动态演化特征，并验证了模型预测的精度。从研究结果可以看出，水合物降压法开采过程中产气量、出砂量与地层压差关系密切。该研究成果对天然气水合物出砂预测具有一定启示作用，对后续水合物规模矿场试采也具有重要的意义。

关键词: 天然气水合物, 降压开采, 地层出砂, 采气量, 地层压差

Abstract:

. The domestic and abroad experience of production test of natural gas hydrate shows that the problem of sand production is a key factor restricting the effective development of hydrate resources. From the perspective of the flow in porous media of formation fluid, in combination with rock mechanics theory, this study establishes a new model for quantitatively predicting sand production during the natural gas hydrate exploitation by depressurization recovery through deriving gas production rate and sand production rate within the sand production radius. When formation, fluid and other parameters are determined in the model, the sand production rate of the formation has a positive correlation with gas production rate. Therefore, the corresponding sand production rate can be quantitatively predicted by determining gas production during the natural gas hydrate exploitation by depressurization recovery. Combined with the simulation of sand production of rock particles, this paper describes the dynamic evolution characteristics of sand production of particles of hydrate during the decomposition process at different stages, and verifies the accuracy of model prediction. The research results show that the gas production rate and sand production rate are closely related with differential pressure of formation during the natural gas hydrate exploitation by depressurization recovery. The research results have certain enlightening function on the prediction of sand production of natural gas hydrate, and are also of great significance for the subsequent large-scale production test of natural gas hydrate in the oil field..

Key words: natural gas hydrate, depressurization recovery, formation sand production, gas production, differential pressure of formation

中图分类号:

TE133

李占东, 刘建辉, 李中, 李阳, 张海翔, 王殿举, 庞鸿. 天然气水合物降压开采出砂定量预测新模型[J]. 石油学报, 2019, 40(S2): 160-167.

Li Zhandong, Liu Jianhui, Li Zhong, Li Yang, Zhang Haixiang, Wang Dianju, Pang Hong. A new model for quantitative prediction of sand production during natural gas hydrate exploitation by depressurization recovery[J]. Acta Petrolei Sinica, 2019, 40(S2): 160-167.

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天然气水合物降压开采出砂定量预测新模型

A new model for quantitative prediction of sand production during natural gas hydrate exploitation by depressurization recovery

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