用横波波速测定岩石的各向异性  

Determining Anisotropy of the Rock by Using Speed of the Shear Wave

作　　者：严蓬蓬[1] 陈宇[1] 沈建国[1] 刘凤英[1] 朱世和[2] 周武[2] 

机构地区：[1]清华大学物理系 [2]辽河石油勘探局测井公司

出　　处：《测井技术》2003年第5期356-359,共4页Well Logging Technology

摘　　要：测量了横波在各向异性岩石样品中以不同偏振角度传播时的波速。研究了井下岩石样品在干燥、含水饱和与煤油饱和状态下的各向异性情况。计算出这 3种情况下岩石样品的时差各向异性常数和横波平均速率。在干燥、含水饱和与含油饱和条件下 ,含水饱和的各向异性系数有最大值 ;干燥的各向异性系数有最小值。在含油饱和情况下的横波平均声速要大于含水饱和条件下的横波平均声速。含油饱和与含水饱和条件下的横波速度有明显差别 ,但各向异性的趋势却比较一致。Measured are the speeds of shear wave transmitting through the anisotropic rock samples with different polarization angles. Also measured are anisotropies of dried, water-saturated and kerosene-saturated rock samples, the samples time-difference constants and average speeds of the shear wave. In the three cases, the anisotropy coefficient of water-saturated sample is maximum, but the coefficient of dried sample is minimum. The average velocity of shear wave, when the smaple is oil-saturated, is faster than that when the sample is water-saturated. The velocity of shear wave of oil-saturated sample is obviously different from that of water-saturated sample,yet, their anisotropic trends are fairly consistent.

关 键 词：横波波速 测定 岩石 各向异性 声波测井 

分 类 号：P631.814[天文地球—地质矿产勘探]