气候变化领域集成服务门户(CCPortal): Temperature Effect on the Velocity-Porosity Relationship in Rocks

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DOI	10.1029/2019JB019317
	Temperature Effect on the Velocity-Porosity Relationship in Rocks
	Qi H.; Ba J.; Müller T.M.
发表日期	2021
ISSN	21699313
卷号	126 期号:1
英文摘要	Understanding the effect of temperature on physical properties of rocks is important to develop deep oil, gas, and geothermal resources. Velocity-porosity relations are essential ingredients for a seismic rock physics model. However, relatively little effort has thus far been made to capture the temperature effect on velocity-porosity relations. To overcome this limitation, we develop a double-porosity model based on Biot's theory. This model is complemented with the Batzle-Wang empirical equations for the pressure and temperature dependence of the pore fluid, as well as the David-Zimmerman model to quantify temperature-dependent microcrack density. The combined model is tested on carbonate and hyaloclastite samples, for which the variation of ultrasonic P-wave velocity with temperature has been measured in the laboratory. Comparison of the predicted P-wave velocity with the measured velocity shows that the proposed model is capable of quantitatively describing the rock velocity-temperature and velocity-porosity relations. We found that, for our rock samples, the temperature-dependent change of microcrack porosity was not the dominant factor affecting the velocity-porosity relation and that the temperature-dependent fluid properties had a greater effect. The proposed model also predicts that the velocity dispersion and the attenuation peak of P-waves in carbonate rock samples become less pronounced with increasing temperature. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	attenuation; P-wave velocity; rock physics model; saturated rock; temperature; ultrasonic experiment
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187417
作者单位	School of Earth Sciences and Engineering, Hohai University, Nanjing, China; Department of Seismology, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, BC, Mexico
推荐引用方式 GB/T 7714	Qi H.,Ba J.,Müller T.M.. Temperature Effect on the Velocity-Porosity Relationship in Rocks[J],2021,126(1).
APA	Qi H.,Ba J.,&Müller T.M..(2021).Temperature Effect on the Velocity-Porosity Relationship in Rocks.Journal of Geophysical Research: Solid Earth,126(1).
MLA	Qi H.,et al."Temperature Effect on the Velocity-Porosity Relationship in Rocks".Journal of Geophysical Research: Solid Earth 126.1(2021).