Main control factors of carbon dioxide on swelling effect of crude hydrocarbon components

doi:10.7623/syxb201603011

Acta Petrolei Sinica ›› 2016, Vol. 37 ›› Issue (3): 392-398.DOI: 10.7623/syxb201603011

• Oil Field Development • Previous Articles Next Articles

Main control factors of carbon dioxide on swelling effect of crude hydrocarbon components

Han Haishui^1,2,3, Li Shi^1,2,3, Chen Xinglong^1,2,3, Qin Jishun^1,2,3, Zeng Baoquan¹

1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
2. State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China;
3. National Energy CO₂ Flooding and Storage Technology R & D(Experiment) Center, Beijing 100083, China

Received:2015-08-07 Revised:2015-10-28 Online:2016-03-25 Published:2016-04-12

CO₂对原油烃组分膨胀效应的主控因素

韩海水^1,2,3, 李实^1,2,3, 陈兴隆^1,2,3, 秦积舜^1,2,3, 曾保全¹

1. 中国石油勘探开发研究院北京 100083;
2. 提高石油采收率国家重点实验室北京 100083;
3. 国家能源二氧化碳驱油与埋存技术研发(实验)中心北京 100083

通讯作者: 韩海水,男,1985年4月生,2009年获长江大学学士学位,2015年获中国石油勘探开发研究院油气田开发专业博士学位,现为中国石油勘探开发研究院石油采收率研究所工程师,主要从事CO₂驱提高石油采收率理论与技术研究。Email:hanhaishui@petrochina.com.cn
作者简介:韩海水,男,1985年4月生,2009年获长江大学学士学位,2015年获中国石油勘探开发研究院油气田开发专业博士学位,现为中国石油勘探开发研究院石油采收率研究所工程师,主要从事CO₂驱提高石油采收率理论与技术研究。Email:hanhaishui@petrochina.com.cn
基金资助:
国家重大科技专项(2011ZX05016-001)、中国石油天然气股份有限公司重大科技专项(2014E-3601)和中国石油天然气股份有限公司科学研究与技术开发项目(2014A-1009)资助。

Abstract

Abstract:

Through the composition analysis of crude component in different oil provinces of China, eleven representative hydrocarbon components were selected and respectively combined with CO₂ to form a binary system for PVT experiments. The crude hydrocarbon components have 6-16 carbon atoms, molecular structures of straight-chain alkane, cycloalkane with single or dual ring(s), and arene with single or dual ring(s). Based on the comparative analysis of experimental results, it is found that the CO₂ dissolved in crude hydrocarbon components may lead to a certain degree of volume swell in the binary system, and the swell degree is mainly affected by the properties of crude components, molar content of CO₂, temperature and other factors, but less influenced by pressure. It is further proposed that the influences of crude component properties can be characterized by molar density, and the swell coefficient has a strict linear relationship with the corresponding molar density of crude components. The swell coefficient is increased rapidly with increasing molar content of CO₂, presenting a concave increasing curve. The impact of temperature mainly occurs in the system with higher molar content of CO₂. The higher the temperature is, the greater the volume swell degree will be.

Key words: crude oil hydrocarbon components, carbon dioxide, volume swell, mainly control factors, molar density

摘要：

通过对中国不同油区原油进行组分组成分析,选取了11种具有代表性的烃组分,分别与CO₂组成二元体系进行PVT实验。所选取的原油烃组分碳原子数为C₆-C₁₆,分子结构为直链烷烃、单环/双环环烷烃和单环/双环芳烃。通过实验结果的对比分析发现,原油烃组分中溶解的CO₂可使体系发生一定程度的体积膨胀,且其膨胀幅度主要受原油组分自身性质、CO₂摩尔含量和温度等因素的影响,而压力的影响不大。进一步提出原油组分自身性质的影响可用摩尔密度来表征,膨胀系数与对应条件下原油组分的摩尔密度为严格递增直线关系;膨胀系数随CO₂摩尔含量的增加迅速增大,呈现凹型递增曲线;温度的影响主要体现在CO₂摩尔含量较高的体系,温度越高,体积膨胀幅度越大。

关键词: 原油烃组分, 二氧化碳, 体积膨胀, 主控因素, 摩尔密度

CLC Number:

TE357.4

Han Haishui, Li Shi, Chen Xinglong, Qin Jishun, Zeng Baoquan. Main control factors of carbon dioxide on swelling effect of crude hydrocarbon components[J]. Acta Petrolei Sinica, 2016, 37(3): 392-398.

韩海水, 李实, 陈兴隆, 秦积舜, 曾保全. CO₂对原油烃组分膨胀效应的主控因素[J]. 石油学报, 2016, 37(3): 392-398.

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Main control factors of carbon dioxide on swelling effect of crude hydrocarbon components

CO₂对原油烃组分膨胀效应的主控因素

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Main control factors of carbon dioxide on swelling effect of crude hydrocarbon components

CO2对原油烃组分膨胀效应的主控因素

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CO₂对原油烃组分膨胀效应的主控因素