中国石油勘探 ›› 2007, Vol. 12 ›› Issue (3): 48-51,2.

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初至波表层模型层析反演静校正在吐哈盆地的应用

吴文熙,梁春燕   

  1. 中国石油吐哈油田分公司勘探事业部;中国石油吐哈石油勘探开发指挥部 新疆哈密市839009;新疆哈密市839009
  • 出版日期:2007-06-15 发布日期:2007-06-15
  • 基金资助:
    中国石油吐哈油田分公司研究项目“吐哈盆地复杂地表区静校正方法研究”。

Tomographic Inversion and Static Correction of First Break in Surface Model and Their Application in Tuha Basin

Wu Wenxi and and Liang Chunyan   

  1. Wu Wenxi1 and Liang Chunyan2 1 Exploration Department of Petro China Tuha Oilfield Company, Hami City, Xinjiang Uygur Autonomous Region 839009; 2 PetroChina Tuha Petroleum Exploration & Development Headquarters, Hami City, Xinjiang Uygur Autonomous Region 839009
  • Online:2007-06-15 Published:2007-06-15

摘要: 吐哈盆地地震勘探工作多是在山地、山前带、沙漠、沟壑纵深区等低降速带变化大的复杂地区进行,静校正问题成为制约勘探成效的瓶颈问题。在研究各种新技术、新方法在吐哈盆地的实际应用效果时发现,基于初至波表层模型的层析反演静校正方法在实际地震资料处理中能较好地解决这一问题。该方法主要通过拾取地震初至波的到达时,依据初至信息或其他约束信息,建立初始模型、正演与实际初至时间相匹配的静校正模型,提高了静校正计算的精度,具有良好的实际应用效果。

关键词: 层析反演, 表层模型, 静校正, 吐哈盆地

Abstract: Since seismic exploration of Tuha Basin is mainly carried out in mountainous region, foothill belt, desert, and gully region, where the variation of low velocity layer is rapid, static correction has become a bottleneck restricting the effect of exploration. By analyzing the effect of applying new techniques and methods to Tuha Basin, tomographic inversion and static correction of the first break in surface model are found to be more effective to solve the problem during processing real seismic data. By picking up arrival time of the first seismic break, the new approach establishes an initial model and a static correction model of which the forward initial time matches the practical initial time. Thus the precision of static correction calculation is high. The new approach is found to be of better application effect.

Key words: tomographic inversion, surface model, static correction, Tuha Basin

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