塔中M工区低信噪比地震资料处理技术对策
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  • 英文篇名:Treatment technologies and countermeasure of low signal-to-noise ratio seismic data in M block of mid-Tarim area
  • 作者:张宇 ; 闫更平 ; 王林 ; 宋新利
  • 英文作者:Zhang Yu;Yan Gengping;Wang Lin;Song Xinli;Exploration and Development Research Institute of PetroChina Tarim Oilfield Company;Exploration and Development Research Institute of PetroChina Liaohe Oilfield;
  • 关键词:叠前迭代 ; 反褶积 ; 叠前偏移 ; 信噪比 ; 分辨率
  • 英文关键词:prestack iteration;;deconvolution;;prestack migration;;signal-to-noise ratio;;resolution
  • 中文刊名:KTDQ
  • 英文刊名:Reservoir Evaluation and Development
  • 机构:中国石油塔里木油田公司勘探开发研究院;中国石油辽河油田公司勘探开发研究院;
  • 出版日期:2017-02-26
  • 出版单位:油气藏评价与开发
  • 年:2017
  • 期:v.7
  • 语种:中文;
  • 页:KTDQ201701003
  • 页数:6
  • CN:01
  • ISSN:32-1825/TE
  • 分类号:17-22
摘要
针对塔中M工区石炭系低信噪比地震资料分辨率较低,资料成像较差,速度异常,时间域难以满足精细构造解释要求的问题,采取叠前迭代提高信噪比技术、井控串联反褶积提高分辨率技术和高精度井控各项异性叠前偏移速度建模技术对该区三维地震资料进行处理,资料品质得到有效改善。经过深度处理后的三维地震资料信噪比由小于1提高到大于1.5;新成果资料波组特征更加突出,分辨率提高,频带宽度由8~45 Hz拓宽为6~55 Hz,主频由18 Hz提高为28 Hz,井震标定能更好分辨目的层。新处理的资料层速度精度高,与井速度匹配好。新资料在振幅保持较好前提下,目的层分辨率大幅提高,为该区精细构造解释研究奠定了基础。
        In Carboniferous M block of mid-Tarim area, according to the problems of low resolution of low signal-to-noise ratio seismic data, the poor imaging, the abnormal speed, and the dissatisfied time domain of fine structure interpretation, this paper adopts the technologies to handle 3D seismic data, which involve the improvement of signal-to-noise ratio by prestack iterative technique, the resolution improved by well control series deconvolution technique, and the high accuracy well control anisotropic prestack migration velocity modeling technique. Accordingly, the quality of data is effectively improved. After improving 3D seismic data, signal-to-noise ratio increases from less than 1 to more than 1.5. In addition, wave group characters of new data are more prominent, the resolution is improved, the bandwidth is broadened from 8 ~ 45 Hz to 6 ~ 55 Hz, the dominant bandwidth is broadened from 18 Hz to 28 Hz, and the well-seismic calibration can better distinguish target stratum. The results show that the new data layer has high speed accuracy and better match with well velocity. On the premise of good amplitude, the resolution of target stratum improves drastically, which provides basis for fine structural interpretation in this area.
引文
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