井筒注二氧化碳双重非稳态耦合模型

doi:10.7623/syxb201508008

石油学报 ›› 2015, Vol. 36 ›› Issue (8): 976-982.DOI: 10.7623/syxb201508008

井筒注二氧化碳双重非稳态耦合模型

郭建春¹, 曾冀², 张然³, 周长林²

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 中国石油西南油气田公司工程技术研究院四川广汉 618300;
3. 中国石油大学油气资源与探测国家重点实验室北京 102249

出版日期:2015-08-25 发布日期:2015-08-06
通讯作者: 曾冀,男,1988年5月生,2011年获西南石油大学学士学位,2014年获西南石油大学硕士学位,现为中国石油西南油气田公司工程技术研究院助理工程师,主要从事油气藏增产改造方面的研究。Email:zengjideha@126.com
作者简介:郭建春,男,1970年9月生,1992年获西南石油学院学士学位,1998年获西南石油学院博士学位,现为西南石油大学石油与天然气工程学院院长、教授、博士生导师,主要从事油气藏开采和增产技术方面的研究和教学。Email:guojianchun@vip.163.com
基金资助:
国家自然科学基金项目(No.51374178)和四川省青年科技创新研究团队资助计划项目(2011JTD0018)资助。

A dual transient coupling model for wellbore of carbon dioxide injection well

Guo Jianchun¹, Zeng Ji², Zhang Ran³, Zhou Changlin²

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. Research Institute of Engineering and Technology, PetroChina Southwest Oil and Gas Field Company, Sichuan Guanghan 618300, China;
3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

Online:2015-08-25 Published:2015-08-06

摘要/Abstract

摘要：

二氧化碳在石油工业中有着广阔的应用前景,但目前井筒注二氧化碳模型均未能表征注二氧化碳过程井筒内流动和传热双重非稳态问题。采用Span-Wagner模型和Vesovic模型对二氧化碳热物性参数进行计算,联立连续性方程、运动方程和能量守恒方程,建立了能模拟短期和长期注二氧化碳过程的井筒双重非稳态耦合模型。采用温度和流速双重迭代算法进行数值求解,并完成实例验证和相关理论分析。计算结果表明:新模型能较准确地计算注二氧化碳井筒温度、压力值;摩擦生热项在较大摩阻梯度下不能忽略,而焦耳-汤姆森效应和储层岩性的影响可以忽略。修正后的新模型还可用于预测水力压裂等工艺过程井筒温度分布。

关键词: 二氧化碳, 井筒温度, 井筒压力, 双重非稳态, 耦合

Abstract:

Carbon dioxide has a broad application prospect in oil field, but the dual transient phenomenon for wellbore flow and heat transfer of carbon dioxide injection process cannot be characterized by current models. Span-Wagner model and Vesovic model are used to calculate the thermophysical parameters. Based on continuity equation, motion equation and energy conservation equation, a dual transient coupling model for wellbore which can simulate both long-term and short-term carbon dioxide injection process has been established. The dual iterative algorithm of temperature and velocity is used for numerical calculation, besides verification and relevant theoretical analysis are completed. The results indicate that this model can calculate the wellbore temperature and pressure of carbon dioxide injection well accurately. The heat caused by friction cannot be ignored under a large friction gradient, and the temperature difference caused by Joule-Thomson effect and lithology can be ignore during the carbon dioxide injection process. Furthermore, the modified model can be applied to predict the wellbore temperature distribution for hydraulic fracturing and other treatment process.

Key words: carbon dioxide, wellbore temperature, wellbore pressure, dual transient, coupling

中图分类号:

TE319

郭建春, 曾冀, 张然, 周长林. 井筒注二氧化碳双重非稳态耦合模型[J]. 石油学报, 2015, 36(8): 976-982.

Guo Jianchun, Zeng Ji, Zhang Ran, Zhou Changlin. A dual transient coupling model for wellbore of carbon dioxide injection well[J]. Acta Petrolei Sinica, 2015, 36(8): 976-982.

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井筒注二氧化碳双重非稳态耦合模型

A dual transient coupling model for wellbore of carbon dioxide injection well

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