沉积岩的速度、衰减与岩石物理性质间的关系  

Relationship between attenuation, velocity of sedimentary rocks and petrophysical property.

作　　者：安勇[1] 牟永光[2] 方朝亮 

机构地区：[1]中科院地质与地球物理研究所 [2]中国石油大学 [3]CNPC科技发展部

出　　处：《石油地球物理勘探》2006年第2期188-192,共5页Oil Geophysical Prospecting

摘　　要：本文用Toksoz等人提出的频谱振幅法对砂、泥岩样品的纵、横波速度(vP、vS)及其品质因子(QP、QS)进行了实验室测试,得到以下结论:对于干燥岩石,衰减与频率无关,且纵、横波速度之间存在着强相关性;纵波速度和纵波品质因子呈弱相关性,横波速度与横波品质因子呈强相关性;纵波品质因子与横波品质因子呈强相关性;孔隙率与纵、横波速度有线性关系;岩石的衰减受岩性的影响,泥岩的衰减大干砂岩的衰减,含砾砂岩衰减大干不含砾砂岩。The paper uses frequency-amplitude ratio method presented by Mr. Toksoz et al for laboratory test of velocities (VP, VS) and quality factors (QP, QS) of P- and S-waves in sandstone and mud-stone samples and obtained following conclusions: the attenuation is irrelative to frequency and there is strong correlation between P-wave velocity and S-wave velocity for dry rocks ; the P-wave velocity is weak correlative to P-wave quality factor and S-wave velocity is strong correlative to S-wave quality factor; P-wave quality factor is strong correlative to S-wave quality factor; porosity is linear with P- and S-waves velocities; the attenuation of rocks comes under the influence of lithology, the attenuation of mudstone is greater than that of sandstone and gravel-packing sand is greater than that without gravel pack.

关 键 词：岩石物理性质 频谱振幅法 速度 衰减 品质因子纵波 横波 

分 类 号：P584[天文地球—岩石学] P631.4[天文地球—地质学]