基于地震相分析的孔隙度预测

英文篇名：POROSITY PREDICTION BASED ON SEISMIC FACIES ANALYSIS
中文刊名：物探化探计算技术
英文刊名：Computing Techniques for Geophysical and Geochemical Exploration
作者：刘云 ; 贺振华 ; 汪瑞良 ; 文晓涛 ; 曾驿
英文作者：LIU Yun1 ; HE Zhen-hua1 ; WANG Rui-liang2 ; et al.(1.College of Information Engineering ; Chengdu University of Technology ; Chengdu 610059 ; China ; 2.CNOOC China Limited-Shenzhen ; Guangzhou 518067 ; China).
中文关键词：地震相分析 ; 孔隙度预测 ; 测井资料
英文关键词：seismic facies analysis ; porosity prediction ; logging
出版日期：2010-07-15
机构：成都理工大学;中海石油(中国)有限公司深圳分公司;
年：2010
期：04
出版单位：物探化探计算技术

摘要

这里主要讨论在地震相分析下的孔隙度预测。其基本原理是:首先对研究区块进行前期常规解释(合成记录、层位追踪、构造及断层解释),在此基础上利用地震相分析技术,并结合测井及岩芯资料对研究区进行沉积相带划分,将地震信息转化为地质信息;然后根据相带划分结果,对单一相带中的密度、声波速度与孔隙度井资料进行统计,拟合获得相关最好的波阻抗与孔隙度关系公式,这样多个相带就有不同的孔隙度计算公式;最后通过反演得到的波阻抗计算获得孔隙度。由于在横向上加入了地质解释,所以通过这种方法能够有效结合地质规律,提高三维孔隙度预测精度,还能更好地进行孔隙流体预测及储层评价。
This paper aims at discussing the porosity prediction based on seismic facies analysis.The basic principles are as follows: Firstly,this mothed can distinguish the different sedimentary facies and transform seismic information into geology information by utilizing the seismic facies analysis,and combining with the log and rock core data on the basis of general interpretation(synthetic seismogram,horizon tracing,structure and faule interpretation) in the research area,further more,based on the density and the acoustic velocity data of log in the single sedimentary facies,this mothed calculates best statistic correlation expression in impedance and porosity.There are several expressions for computing porosity in every different sedimentary facies.Finally,those expressions are used to calculate the porosity.Because of the geology interpretation in profile,this method strengthen the porosity prediction precision,pore fluid prediction and reservoir evaluation by combining geology disciplinarian effectively.

引文

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