"断层阴影"识别与校正方法——以松辽盆地升平构造为例
Identification and correction methods of fault shadow zone:A case study of Shengping tectonics in Songliao Basin
于婕 1王静怡 2张芝铭 2刘晓文 1穆伦 3刘宗堡1
作者信息
- 1. 东北石油大学地球科学学院,黑龙江大庆 163318
- 2. 中国石油大庆油田勘探开发研究院,黑龙江大庆 163300
- 3. 中国石油大庆油田国际勘探开发公司,黑龙江大庆 163514;中国石油大庆油田塔木察格公司,黑龙江大庆 163514
- 折叠
摘要
地层错断往往引起速度横向突变,导致在时间域地震资料中出现"断层阴影"现象,影响地质解释结果及圈闭评价等.为此,以松辽盆地升平构造为例,分析"断层阴影"现象,提出了正演模拟法、井震结合地层对比法和平均速度成图法三种识别方法;在此基础上,针对"断层阴影",提出了高精度速度场校正和时间域层位校正两种校正方法.结果表明,高精度速度场校正法可以实现数据体的校正,适应性更广;时间域层位校正法可以实现层位的校正,具有快速、简便的优势.该方法对类似地区具有借鉴意义.
Abstract
Stratigraphic dislocations often cause lateral variations of velocity,resulting in the phenomenon of fault shadow zone in time-domain seismic data,which affects geological interpretation and trap evaluation.To this end,taking the Shengping tectonics in the Songliao Basin as an example,the phenomenon of fault shadow zone is analyzed,and three identification methods are proposed:forward modeling,well-seismic combined stratigraphic correlation,and average velocity mapping.Based on these analyses,two correction methods,namely,high-precision velocity field correction and time-domain horizon correction,are proposed for the fault shadow zone.The results indicate that the high-precision velocity field correction method effectively corrects the data volume and has broader adaptability,while the time-domain horizon correction method allows for quick and straightforward horizon corrections and provides valuable insights for similar areas.
关键词
"断层阴影"识别/"断层阴影"校正/地震正演模拟/高精度速度场校正/时间域层位校正/松辽盆地升平构造Key words
fault shadow zone identification/fault shadow zone correction/seismic forward modeling/high-preci-sion velocity field correction/time-domain horizon correction/Shengping tectonics in Songliao basin引用本文复制引用
基金项目
国家自然科学基金青年科学基金(42102173)
国家自然科学基金面上项目(42172161)
出版年
2024
国家科技期刊平台
NSTL
万方数据