“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

作　　者：于婕 王静怡 张芝铭 刘晓文[1] 穆伦 刘宗堡[1] YU Jie;WANG Jingyi;ZHANG Zhiming;LIU Xiaowen;MU Lun;LIU Zongbao(School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Research Institute of Ex-ploration and Development,Daqing Oilfield of CNPC,Daqing,Heilongjiang 163300,China;International Exploration and Development Company,Petro China Daqing Oilfield Company Limited,Daqing,Heilongjiang 163514,China;Petro China Daqing Oilfield Tamzag Company Limited,Daqing,Heilongjiang 163514,China)

机构地区：[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 [4]中国石油大庆油田塔木察格公司,黑龙江大庆163514

出　　处：《石油地球物理勘探》2024年第4期819-827,共9页Oil Geophysical Prospecting

基　　金：国家自然科学基金青年科学基金项目“伸展条件下不同走向断层生长连接模式及伴生圈闭形成机制研究”(42102173);国家自然科学基金面上项目“基于储层构型理论解析的三角洲相致密砂岩储集性多级次表征研究”(42172161)联合资助。

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。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 

分 类 号：P631[天文地球—地质矿产勘探]