分频反演技术在准东XIQ地区古沟谷薄砂层储层预测中的应用  

Application of Frequency-divided Inversion of Thin Sand Layer Prediction of Ancient Valley Reservoir in XIQ Area of Eastern Jungar Basin

作　　者：黄林军[1] 潘建国[1] 黄玉[1] 郭娟娟[1] 蔡刚[1] 王彦军[1] 张寒[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《石油天然气学报》2012年第11期52-55,168,共4页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2011ZX05003-003)

摘　　要：准噶尔盆地东部XIQ地区二叠系梧桐沟组(P3w)储层发育薄且横向变化快,砂体预测成为制约该区油藏评价的关键。鉴于来自薄砂层的反射在频率域具有指示时间地层厚度的特征性表现,在储层反演过程中引入分频思想,依靠测井和地震数据建立振幅与频率的关系,合理利用地震的低、中、高频带,以低截频10Hz、主频30Hz、高截频60Hz将地震资料分成多频段进行波阻抗反演。其结果较准确地反映了薄砂体的沟谷充填特征及平面展布规律,并且较真实地反映了地层的超覆接触关系,为该区滚动勘探提供了合理的依据。In the Eastern Junggar Basin,the reservoirs were developed in the Permian Wutonggou Formation with thin and quick lateral variation of reservoirs,the prediction of the sand bodies was the key of the reservoir evaluation.As for the reflection of the thin sand body have the characters of instruction the time strata thickness in the domain of frequency,the idea of frequency-division was introduced to establish the relation between amplitude and frequency,which reasonably used the low,medium,high frequency bands of seism,the seismic data were divided into three bands by low cut-off frequency of 10 Hz,middle frequency of 30 Hz,60 Hz high cut-off frequency for the wave impedance inversion.The inversion results truly reflect the rules of overlap contact relationship of the Permian Wutonggou Formation and the sedimentary model of valley filling,more accurately reflect the changes in sand thickness and plane distribution,it provides a reasonable basis for the rolling exploration of the area.

关 键 词：分频反演 古沟谷薄砂层 储层预测 梧桐沟组 准噶尔盆地 

分 类 号：P631.44[天文地球—地质矿产勘探]