气候变化领域集成服务门户(CCPortal): Experimental Study on Water-rock Reactions with CO2 Fluid in a Deep Sandstone Formation under High Temperature and Pressure

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DOI	10.1111/1755-6724.14631
	Experimental Study on Water-rock Reactions with CO2 Fluid in a Deep Sandstone Formation under High Temperature and Pressure
	Li Chengze; Chen Guojun; Li Chao; Tian Bing; Sun Rui; Su Long; Lu Yingxin; Wang Lijuan
通讯作者	Li, C (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China. ; Li, C (通讯作者)，Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	1000-9515
EISSN	1755-6724
起始页码	268
结束页码	279
卷号	95 期号:1
英文摘要	Qiongdongnan Basin has a tectonic geological background of high temperature and high pressure in a deep reservoir setting, with mantle-derived CO2. A water-rock reaction device was used under high temperature and high pressure conditions, in conjunction with scanning electron microscope (SEM) observations, to carry out an experimental study of the diagenetic reaction between sandstone at depth and CO2-rich fluid, which is of great significance for revealing the dissolution of deep clastic rock reservoirs and the developmental mechanism of secondary pores, promoting deep oil and gas exploration. In this study, the experimental scheme of the water-rock reaction system was designed according to the parameters of the diagenetic background of the deep sandstone reservoir in the Qiongdongnan Basin. Three groups of single mineral samples were prepared in this experiment, including K-feldspar samples, albite samples and calcite samples. Using CO2 as a reaction solution, a series of diagenetic reaction simulation experiments were carried out in a semi-closed high temperature and high pressure simulation system. A field emission scanning electron microscope (SEM) was used to observe the microscopic appearance of the mineral samples after the water-rock reaction, the characteristics of dissolution under high temperature and high pressure, as well as the development of secondary pores. The experimental results showed that the CO2-rich fluid has an obvious dissolution effect on K-feldspar, albite and calcite under high temperature and high pressure. For the three minerals, the main temperature and pressure window for dissolution ranged from 150 degrees C to 300 degrees C and 45 MPa to 60 MPa. Scanning electron microscope observations revealed that the dissolution effect of K-feldspar is most obvious under conditions of 150 degrees C and 45 MPa, in contrast to conditions of 200 degrees C and 50 MPa for albite and calcite. Through the comparative analysis of experimental conditions and procedures, a coupling effect occurred between the temperature and pressure change and the dissolution strength of K-feldspar, albite and calcite. Under high temperature and high pressure, pressure changed the solubility of CO2, furthermore, the dissolution effect and strength of the sandstone components were also affected. The experiment revealed that high temperature and high pressure conditions with CO2-rich fluid has a significant dissolution effect on aluminosilicate minerals and is conducive to the formation of secondary pores and effective reservoirs. Going forward with the above understanding has important implications for the promotion of deep oil and gas exploration.
英文关键词	deep reservoir; high temperature and pressure; CO2‐ rich fluid; dissolution; Qiongdongnan Basin
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000620197000022
来源期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253867
作者单位	[Li Chengze; Chen Guojun; Li Chao; Su Long] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Li Chengze; Chen Guojun; Li Chao; Su Long] Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China; [Li Chengze; Chen Guojun; Lu Yingxin; Wang Lijuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Tian Bing] Inner Mongolia Univ Sci & Technol, Baotou 014000, Inner Mongolia, Peoples R China; [Sun Rui] CNOOC Res Inst Co Ltd, Beijing 100028, Peoples R China
推荐引用方式 GB/T 7714	Li Chengze,Chen Guojun,Li Chao,et al. Experimental Study on Water-rock Reactions with CO2 Fluid in a Deep Sandstone Formation under High Temperature and Pressure[J]. 中国科学院西北生态环境资源研究院,2021,95(1).
APA	Li Chengze.,Chen Guojun.,Li Chao.,Tian Bing.,Sun Rui.,...&Wang Lijuan.(2021).Experimental Study on Water-rock Reactions with CO2 Fluid in a Deep Sandstone Formation under High Temperature and Pressure.ACTA GEOLOGICA SINICA-ENGLISH EDITION,95(1).
MLA	Li Chengze,et al."Experimental Study on Water-rock Reactions with CO2 Fluid in a Deep Sandstone Formation under High Temperature and Pressure".ACTA GEOLOGICA SINICA-ENGLISH EDITION 95.1(2021).