Effects of Fluid Saturation Variations on the Acoustic Parameters of Reservoir Rocks Under Simulated Formation Conditions


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Abstract

Effects of fluid-saturation variations on the acoustic parameters of reservoir rocks under simulated formation conditions are studied. Experimental velocities of ultrasonic waves traversing cores saturated with CO2, formation water, and crude oil are measured at various temperatures and pressures and analyzed. Experimental results showed that the velocities of longitudinal and transverse waves in cores increased if the confining pressure and rock elasticity modulus increased. The transverse wave velocity did not depend on the saturating substance. The longitudinal wave velocity was greater for water saturation than for CO2 and oil saturation.

About the authors

Huohai Yang

School of Petroleum & Natural Gas Engineering, Southwest Petroleum University; College of Energy Resources, Chengdu University of Technology

Author for correspondence.
Email: yhh1986_swpw@163.com
China, Chengdu; Chengdu

Xiangyi Yi

College of Energy Resources, Chengdu University of Technology

Email: yhh1986_swpw@163.com
China, Chengdu

Qiang Fang

School of Petroleum & Natural Gas Engineering, Southwest Petroleum University

Email: yhh1986_swpw@163.com
China, Chengdu

Jun’an Lu

Natural Gas Department, Tarim Oil Field

Email: yhh1986_swpw@163.com
China, Korla

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