基于波动方程正演模拟分析薄砂层含不同流体的AVO特征

英文篇名：Analysis of AVO Characterisitics on Thin Sand Reservoir with Various Fluid Based Seismic Modeling
中文刊名：地质科技情报
英文刊名：Geological Science and Technology Information
作者：周丽 ; 顾汉明 ; 马灵伟 ; 成景旺
英文作者：ZHOU Li ; GU Han-ming ; MA Ling-wei ; CHENG Jiang-wang(Insititute of Geophysics and Geomatics ; China University of Geosciences ; Wuhan 430074 ; China)
中文关键词：薄砂层 ; 孔隙流体 ; 正演模拟 ; AVO特征
英文关键词：thin sand reservoir ; pore-fluid ; seismic modeling ; AVO characters
出版日期：2013-03-15
机构：中国地质大学地球物理与空间信息学院;
年：2013
期：02
出版单位：地质科技情报

摘要

塔河油田碎屑岩储层厚度较小,薄层AVO特征受薄层内多次波反射以及薄层调谐效应和频率滤波效应影响,导致薄层AVO特征与厚层AVO特征差异较大。为此,笔者设计了不同含油气性薄层砂体模型来进行波动方程正演模拟,得到了CRP道集记录,提取了目的层反射振幅,基于入射波振幅计算了反射系数,从而获得了薄层地震正演AVO曲线,分析了塔河油田碎屑岩储层含不同流体时的AVO特征,找出了实际地质条件下的含油气性与AVO属性特征的对应关系,以指导地震剖面上的含流体预测工作。
The thickness of clastic rock reservoir in Tahe Oilfield is small.AVO characteristics in thin layer are affected by multiples,tuning effect and frequency filtering effect in thin interbeds.The AVO characteristics in thin interbeds are different from those in thick interbeds.Therefore,this paper designed different thin hydrocarbonic sandstone reservoir models for wave-equation modeling.We acquired the CRP gathering records,extracted the target layer reflection amplitude.We get the reflection factor based on the amplitude of incident wave,and obtain thin seismic forward AVO curves to analyse the AVO characteristics of reservoir rocks with different fluids in Tahe Oilfield.In the actual geological conditions,the relationship between hydrocarbon and AVO attributes was used to guide fluid forecast in the seismic profile.

引文

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