含孔隙液砂岩的波速和Q值  

WAVE VELOCITY AND QUALITY FACTOR Q OF SANDSTONE WITH POROSITY FLUID

作　　者：李爱兵[1] 马丽云[1] 赵永信[1] 

机构地区：[1]中国科学院地球物理研究所,地球动力学高温高压实验室

出　　处：《地球物理学报》1995年第A01期288-294,共7页Chinese Journal of Geophysics

基　　金：国家自然科学基金

摘　　要：利用谐振技术，测量了两类砂岩在饱水、饱油，以及水驱油条件下的声波波速和Ｑ值．实验结果表明：合少量水的砂岩，其Ｑ值大幅度下降，波速也有明显的减少；在半饱和状态，Ｑ值一直保持很低，而波速随含水饱和度的增加有微弱的降低．砂岩在半饱和油时，Ｑ值很小，拉伸波速度Ｖ_ｅ和扭转波速度Ｖ_ｓ都比砂岩不含孔隙液时的值要高，Ｖ_ｅ增高的幅度更大，而且Ｖｅ和Ｖｓ随含油饱和度的变化而改变．在水驱油的过程中，随着含水饱和度的增加，及含油饱和度的减少，Ｖ_ｅ和Ｖ_ｓ都有下降的趋势．而Ｑ值没有趋势性的变化．Wave velocity and quality factor Q for two kinds of sandstone were measured by use of the resonance method under different conditions (saturation water, saturation oil and oil expelled by water). The experiment results show: (1) in case of sandstone with a little water, the Q declines sharply. and wave velocity decrease obviously; (2) in case of partial water saturation,the Q keeps Very low, wave velocity comes down slightly along with water saturation increasing; (3) in case of oil saturation, the Q is very low and extensional wave velocity Ve and shear wave velocity Vs are bigger than that of sandstone without porosity fluid, Ve increases fast, but Ve and Vs change obviously along with variation in the oil saturation; (4) in the process of oil expelled by water, the tendency are for Ve and Vs to decline with water saturation increasing and oil saturation decreasing, but the Q does not change tendentiously.

关 键 词：孔隙液 砂岩 波速 Q值 油矿床 勘探 

分 类 号：P618.130.8[天文地球—矿床学]