Experiment Study of Wave Velocity and Elastic Modules Variation Characteristics for Carbonates
详细信息
- 责任者：Tang Jie (School of Geosciences ; China University of Petroleum ; Qingdao 266580 ; China) ; Guo Yuan
- 刊名：Journal of China University of Petroleum
- 出版年：2012
- 卷期：36(5)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 弹性常数 ; elastic constants ; 波群速度 ; group velocity
- 页码：p.62-66, 71
- 图表：2 illus., 2 tables, 18 refs.
- 分类号：1600
- issnNo：ISSN1673-5005
- isbnNo：CN37-1441/TE
摘要
The elastic parameters of dry and saturated carbonate samples from the same reservoir at quasi-static and ultrasonic frequencies were measured in the laboratory. The wave velocity and elastic modulus characteristics were studied. The results show that in addition to the differences in loading frequency,there are different strain differences in the static measurement and dynamic measurement range.The wave velocity of carbonate samples decreases with porosity increasing.The wave velocity ratio in saturated samples has more dispersion effect with the increase of porosity.Complete saturation of the pore space with water causes an increase and decrease in compressional and shear wave velocity as well as significant changes in the shear modulus.The observed shear weakening indicates that a rock-fluid interaction occurs with water saturation.
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