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PP??AVO??????????????
引用本文:孙鹏远,孙建国,卢秀丽.PP??AVO??????????????[J].天然气工业,2004,24(2):44-46.
作者姓名:孙鹏远  孙建国  卢秀丽
作者单位:1.????????2????????????????????????????????????????????????????????????
基金项目:国家自然科学基金项目 (4 9874 0 2 9),高等学校博士学科点专项科研基金项目 (970 1870 5 ),教育部回国启动基金(98130 30 0 5 ),教育部骨干教师资助计划长江学者专项共同资助
摘    要:文章通过对Aki、Xu等给出的两个不同参数表示的PP波反射系数近似公式的重新整理和表述,给出了两组不同形式的AVO属性,并讨论了利用特殊角度道所反映的AVO属性及其组合特征来提取AVO属性的方法。在此基础上,详细地分析了各个属性之间的关系及其不同属性所反映的AVO背景趋势的变化特征;讨论了利用这些AVO属性组合来构建速度、密度、波阻抗、拟泊松比因子、流体因子及拉梅常数等地震属性剖面的原理和方法;选用不同地区的25个含油气砂岩模型进行了多属性AVO交绘图分析,讨论其不同岩性参数在不同AVO属性交绘图上的响应特征。通过分析和讨论可以得出:①利用文章给出的两组AVO属性不仅可以构建多种地震属性剖面,而且还可以构建多参数、多属性AVO交绘图;②不同属性的AVO交绘图体现了不同岩性参数对储层填充物及含油气性的敏感程度;③只有综合利用多种属性的AVO交绘图才能可靠地对岩性参数进行反演和准确地预测储层。

关 键 词:地震波  AVO    储集层  地层参数  地震解释
修稿时间:2003年9月24日

Multiple Attribute Cross-plot Analysis of PP-wave AVO
Sun Pengyuan,Sun Jianguo,Lu Xiuli.Multiple Attribute Cross-plot Analysis of PP-wave AVO[J].Natural Gas Industry,2004,24(2):44-46.
Authors:Sun Pengyuan  Sun Jianguo  Lu Xiuli
Affiliation:1. College of Geoexploration Science and Technology, Jilin University; 2. Laboratory of Wave Theory and Imaging Technology, Open Research Laboratory of Integrated Geophysical Interpretation Theory, the Ministry of Land and Resources
Abstract:In the paper, through rearranging and restating the PP wave reflection coefficient approximate formulas expressed by tow different parameters given out by Aki and Xu, etc., tow groups of different AVO attributes are presented and the methods of extracting the AVO Attributes by use of the AVO attributes reflected by special angular trace gathers and their combination properties are discussed; on the basis of this, the relation among various attributes and the characteristics of AVO background trend changes reflected by different attributes are analyzed in detail; the principles and methods of constructing various seismic attribute sections, such as velocity, density, impedance, pseudo Poisson ratio factor, fluid factor and Lame′s constant, etc., by applying these AVO attribute combinations are discussed; the multiple attribute crossplot analysis is carried out through selecting 25 hydrocarbon bearing sandstone models collected from different areas; and the response characteristics of variant lithologic parameters on various AVO attribute crossplots are talked out. From analyzing and discussing, it is concluded that not only multiple seismic attribute sections but also multiparameter and multiple attribute AVO crossplots may be constructed by use of the tow groups of AVO Attributes presented in the paper; various attribute AVO crossplots embody the sensitivities of variant lithologic parameters to the fillings and hydrocarbon potential of reservoirs; and, only by applying comprehensively the multiple attribute AVO Crossplots can the inversions of lithologic parameters be carried out reliably and the reservoirs be predicted accurately.
Keywords:Seismic wave    Amplitude versus offset    Chart    Reservoir    Formation parameter    Seismic interpretation
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