地震波形指示反演及特征参数模拟在薄储层预测中的应用  

The Application of Seismic Waveform Indicator Inversion and Characteristic Parameter Simulation to Thin Reservoir Prediction

作　　者：杜伟维[1] 金兆军 邸永香 

机构地区：[1]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830013 [2]西安交通大学数学与统计学院,陕西西安710049 [3]北京中恒利华石油技术研究所,北京100101

出　　处：《工程地球物理学报》2017年第1期56-61,共6页Chinese Journal of Engineering Geophysics

基　　金：中国石化油气勘探重大导向项目(编号:2015KT0812)

摘　　要：塔河油田卡拉沙依组钻井多、埋藏深、储层薄,传统的稀疏脉冲反演及地质统计学反演无法满足开发阶段的需求。为此,首先采用地震波形指示反演方法,在贝叶斯框架下利用地震约束测井参数进行高频模拟。然而该方法虽然有较高的分辨率和后验效果,但由于砂泥岩阻抗难以区分,不能很好地预测砂岩分布范围。因此,引入特征参数模拟。该方法利用波形指示反演的原理,优选能够反映岩性的敏感曲线参与模拟,提高了薄层预测精度。反演结果显示:后验井吻合率高,纵向上分辨率高,砂体叠置关系清晰;砂体横向展布自然,符合地质规律。The Kalashayi formation of the Tahe oilfield is characteristic of lots of drillings, deeply buried reservoir and thin reservoir,so the traditional sparse pulse inversion and geo-statistical inversion can＇t meet the needs of the development stage. This study, based on the inversion method of the seismic waveform indicator,carries out the high frequency simula-tion of seismic constrained logging parameters in the Bayesian framework.However,although this method has higher resolution and posterior effect, it can＇t well predict sandstone distribution range, because of the difficulty in distinguishing the impedances met in sandstone and mudstone. Therefore,this paper introduces the method of characteristic pa-rameter simulation method,which uses the inversion principle of seismic waveform indica-tor to reflect preferably the sensitive curve of lithology,and to improve the prediction accu-racy of thin reservoir. The results of inversion show that the well coincidence rate of the posterior is high,and the vertical resolution is high,the relationship of sand body is clear, and the lateral distribution of sand body is natural in accordance with geological rules.

关 键 词：波形指示反演 特征参数模拟 相控 储层预测 

分 类 号：P631.4[天文地球—地质矿产勘探]