Abstract：Limestone was used as rock sample in the experiment.P-wave andS-wave velocities at different water saturations in rock sample were de-termined using ultrasonic rock-parameter tester. The following relationsbetween P-wave velocity (S-wave velocity or ratio of P-wave velocityto S-wave velocity)and water saturation have been obtained:.P-wave velocity(vr)in pure limestonestone is directly proportional to water saturation.·S-wave velocity(νs)is inversely proportional to water saturation.·νp/νs is higher than 2 in the case of water-saturated limestone..νp/νs is less than 2 in the case of gas-saturated limestone.·νp/νs in pure water-saturated limestone with small porosity is higher than νp/νs in striped water-saturated argillaceous limestone with great porosity.Fluid content in formation can be determined using these relations.Furthermore,oil,gas and water-bearing beds in poorly-consolidated for-mation can be ascertained using the relation between νp/νs and watersaturation.
史謌, 沈联蒂. 灰岩含水饱和度对纵、横波速度变化影响的实验研究[J]. 石油地球物理勘探, 1990, 25(4): 469-479.
Shi Ge, Shen Liandi. Experimental study of how water saturation in limestone influences the velocities of P-wave and Swave. OGP, 1990, 25(4): 469-479.
