岩性油气藏 ›› 2020, Vol. 32 ›› Issue (3): 115–121.doi: 10.12108/yxyqc.20200311

• 勘探技术 • 上一篇    下一篇

地震伪井速度点宏观校正方法与应用——以珠江口盆地M气田为例

罗泽, 谢明英, 梁杰, 涂志勇, 侯凯   

  1. 中海石油(中国)有限公司 深圳分公司, 广东 深圳 518000
  • 收稿日期:2019-09-16 修回日期:2019-11-13 出版日期:2020-05-21 发布日期:2020-04-30
  • 第一作者:罗泽(1985-),男,硕士,工程师,主要从事地震地质综合解释及储层预测等方面的研究工作。地址:(518000)广东省深圳市南山区后海滨路(深圳湾段)3168号中海油大厦。Email:luoze@cnooc.com.cn。
  • 基金资助:
    中海石油（中国）有限公司综合科研项目“恩平18区疏松砂岩稠油油藏有效开发技术”（编号：YXKY-2019-SZ-01）资助

Macro-correction method and application of seismic pseudo-well velocity point: a case study from M gas field in Pearl River Mouth Basin

LUO Ze, XIE Mingying, LIANG Jie, TU Zhiyong, HOU Kai   

  1. Shenzhen Branch of CNOOC Ltd., Shenzhen 518000, Guangdong, China
  • Received:2019-09-16 Revised:2019-11-13 Online:2020-05-21 Published:2020-04-30

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摘要： 地震勘探开发中速度研究方法的选取是时深转换的关键。鉴于珠江口盆地M气田断裂系统复杂，构造主体部位受断层影响导致横向速度变化明显，而以往时深转换方法诸如变速成图法或井时深关系拟合法得到的深度构造图误差偏大，很难满足开发阶段高精度构造研究的需求。由此在传统变速成图方法的基础上进行了改进，优化后的地震伪井速度点宏观校正方法是利用伪井速度时间函数与测井速度时间函数的差值对地震速度进行校正，将井纵向分辨率高和地震横向分辨率高的优势更好地结合在一起，从而提高了工作效率，同时也降低了构造的不确定性。新提出的地震伪井速度点宏观校正方法有效提高了该区时深转换的精度。

关键词: 时深转换, 变速成图, 伪井速度点, 宏观校正, 珠江口盆地

Abstract: In seismic exploration and development,the selection of velocity research method is the key to timedepth conversion. In view of the complexity of fault system in M gas field of Pearl River Mouth Basin,the transverse velocity variation is obvious due to the influence of faults on the main part of structure,while the error of depth structure map obtained by previous time-depth conversion methods,such as variable velocity mapping or well-time-depth relationship fitting,is obvious. It is too large to meet the needs of high-precision structural research in the development stage. The traditional variable speed mapping method was improved. The optimized pseudo-well velocity point macro-correction method is to use the difference between pseudo-well velocity time function and logging velocity time function to correct the seismic velocity,which combines the advantages of high vertical resolution of wells and high lateral resolution of earthquakes better. It can improve work efficiency and reduce structural uncertainty at the same time. The actual drilling results show that the macro-correction method of pseudo-well velocity points effectively improves the accuracy of time-depth conversion in this area.

Key words: time-depth conversion, variable speed mapping, macro-correction of pseudo-well velocity point, Pearl River Mouth Basin

中图分类号: 

  • TE122.2
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