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薄砂体—窄河道地震识别技术研究及其在吐哈盆地SN地区应用

魏立花1，杨占龙1，韩小锋2，黄云峰1，张丽萍1，黄小鹏1   

  1. 1.中国石油勘探开发研究院西北分院，甘肃 兰州 730020；2.中国地质调查局西安地质调查中心，陕西 西安 710054
  • 收稿日期:2014-05-30 修回日期:2014-09-17 出版日期:2014-12-10 发布日期:2014-12-10
  • 作者简介:魏立花(1974-)，女，甘肃榆中人，高级工程师，主要从事储层预测及目标评价研究. E-mail:wei_lh@petrochina.com.cn.
  • 基金资助:
    国家油气重大专项“岩性地层油气藏成藏规律、关键技术及目标评价”项目(编号:2011ZX05001)资助.

Research and Application of Thin Sand Body-Narrow Channel Seismic Identification Technology in the SN Area

WEI Li-hua1，YANG Zhan-long1，HAN Xiao-feng2，HUANG Yun-feng1，ZHANG Li-ping1，HUANG Xiao-peng1   

  1. 1.Research Institute of Petroleum Exploration & Development-Northwest,PetroChina,Lanzhou 730020,China;
    2.Xi′an Center of Geological Survey,CGS,Xi′an 710054,China
  • Received:2014-05-30 Revised:2014-09-17 Online:2014-12-10 Published:2014-12-10

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摘要： 吐哈盆地SN地区三间房组油层段储层沉积相为辫状河三角洲前缘水下分流河道沉积，含油砂体单层厚度薄，横向变化快，且分布在厚砂岩附近5~10m的砂体在地震剖面上响应不明显，造成地震预测困难。因此，通过在层序地层格架控制下，应用正演模型分析结果，对目的层段地震资料进行针对性的目标处理，在处理后的地震剖面上，应用从岩层到层段、由点到面的研究思路，确定运用地层切片、属性分析、地震相分析、频谱分析以及岩性反演技术，对该区薄层砂体进行了预测。预测结果与钻井对比，该方法可预测的单砂体符合程度高。通过该项研究，形成适合该区薄砂体—窄河道地震预测的方法系列，提高该区储层和油气预测精度，指导老油区勘探开发。

关键词: 薄砂体, 目标处理, 地层切片, 属性分析, 地震识别

Abstract: As for the reservoir of oil interval in the Sanjianfang Formation located in Shannan area of Turpan-Hami Basin,its sedimentary facies are underwater distributary′s channel sediment in the frontier of braided river delta.It is suggested that the oil-bearing sandbody is characterized by thin single sand layer and rapid lateral changes,and the sand distributed near the thick sandstone by 5-10m shows unobvious response on seismic section,which resulted in difficult seismic prediction.Therefore,by forward modeling analysis result,seismic data of interested interval have been processed by specific technique under control in the sequence stratigraphic framework.Various methods have been applied to the processed seismic data like stratal slice,attribute analysis,seismic facies analysis,spectral analysis,and seismic inversion,etc.to predict thin sand in the light of research designs such as from strata to monostratum and from roughness to fineness.Practical drilling proves the predictable high coincidence rate of sandbody by this method.This paper also indicates that the series of methods are worthy of favorable application and extension by aiming at improving prediction accuracy of reservoir and oil-gas in the area and guiding old oildom to promote exploration and development.

Key words: Thin sand body, Target process, Stratal Slice, Attribute analysis, Seismic recognition

中图分类号: 

  • TE132.1
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