Investigation in the Effect on Wave Velocity and Attenuation from the Water Saturation in Sand at Reservoir Conditions

Abstract

At reservoirs conditions, the supersonic wave is used to measure the P-wave velocity, S-wave velocity, and attenuation Q of the sand samples gathered from Changqing oil field with different water saturations. It is found that the fluid contained in the samples has little effect on S-wave velocity, but relatively more effects on P-wave velocity; the relationship between the fluid concentration and the S-wave and P-wave attenuation has different behaviors. The experiments results and the associated mechanism are analyzed and the real application is provided.