首页|"断层阴影"识别与校正方法——以松辽盆地升平构造为例

"断层阴影"识别与校正方法——以松辽盆地升平构造为例

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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.
Identification and correction methods of fault shadow zone:A case study of Shengping tectonics in Songliao Basin
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.

fault shadow zone identificationfault shadow zone correctionseismic forward modelinghigh-preci-sion velocity field correctiontime-domain horizon correctionShengping tectonics in Songliao basin

于婕、王静怡、张芝铭、刘晓文、穆伦、刘宗堡

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东北石油大学地球科学学院,黑龙江大庆 163318

中国石油大庆油田勘探开发研究院,黑龙江大庆 163300

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

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"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

国家自然科学基金青年科学基金国家自然科学基金面上项目

4210217342172161

2024

石油地球物理勘探
东方地球物理勘探有限责任公司

石油地球物理勘探

CSTPCD北大核心
影响因子:1.766
ISSN:1000-7210
年,卷(期):2024.59(4)