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天然气地球科学

• 天然气勘探 • 上一篇    

古河道河床侵蚀深度自动识别技术

孙勤华，刘晓梅，张虎权，王宏斌，代冬冬，杨丽莎   

  1. (中国石油勘探开发研究院西北分院，甘肃 兰州 730020)
  • 收稿日期:2015-05-19 修回日期:2015-07-21 出版日期:2015-09-20 发布日期:2015-09-20
  • 作者简介:孙勤华（1980-），男，湖北潜江人，工程师，硕士，主要从事碳酸盐岩储层预测工作. E-mail:sun_qh@petrochina.com.cn.
  • 基金资助:

    中国石油天然气股份有限公司塔里木油田分公司科研项目(编号:041014090012);国家科技重大专项(编号:2011ZX05004-004)联合资助.

Automatic Estimation of Erosion Depth of Ancient River

SUN Qin-hua，LIU Xiao-mei，ZHANG Hu-quan，WANG Hong-bin，DAI Dong-dong，YANG Li-sha   

  1. (Research Institute of Petroleum Exploration and Development-Northwest,PetroChina,Lanzhou 730020,China)
  • Received:2015-05-19 Revised:2015-07-21 Online:2015-09-20 Published:2015-09-20

PDF (PC)

343

摘要：

古河道河床的侵蚀作用控制碳酸盐岩暗河岩溶储层发育和岩溶储层的油气成藏。因此，识别古河道河床的侵蚀深度有助于预测油藏发育位置。提出一种古河道河床深度及河道侧边界自动识别技术。在设置河床种子点的基础上，通过估算河床地震同相轴的相干和倾角驱动河床反射界面的自动追踪，同时结合多窗口旋转扫描识别河道边界，实现自动追踪古河道，进而识别河道发育期次及侵蚀深度。该技术在塔里木盆地哈拉哈塘地区碳酸盐岩领域实际应用中，识别出8条古水系及其河床的侵蚀深度。侵蚀深度控制岩溶强度，基于河床侵蚀深度，实现河床周边暗河岩溶系统刻画。

关键词: 古河道, 河床深度, 自动识别, 相干, 倾角, 多窗口扫描

Abstract:

Erosion of ancient rivers contributes to the development of underground karst river,and it also controls the accumulation of oil and gas.Auto-tracing of the depth of ancient riverbed is advantageous to drill profitable reservoir.A new algorithm can estimate the depth of ancient riverbed automatically.Firstly,seismic horizon of riverbed can be traced based on estimation of coherence and dip of interface,then the border of ancient riverbed can be realized by means of scanning of multi-windows.At last,the depth of ancient riverbed can be estimated automatically.According to the plot predicted by this algorithm applied in the carbonate reservoir in HLHT area in the Tarim Basin,there were eight ancient channels in this area,and scaled underground karst reservoir located in both sides of river where river eroded reservoir remarkably is developed.

Key words: Ancient river, Depth of riverbed, Automatical estimation, Coherency, Dip multi-windows scanning

中图分类号: 

  • TE19

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