叠前时间偏移成像处理技术在古龙断陷应用研究

英文篇名：The Application of Pre-stack Time Migration Imaging Processing Technology in Gulong Faulted Depression
中文刊名：中国西部科技
英文刊名：Science and Technology of West China
作者：宋俭
英文作者：SONG Jian1 ; 2(1.College of Energy Resources ; Chengdu University of Technology ; Chengdu ; Sichuan 610059 ; China ; 2.Personnel department ; Daqing oil field company LTD ; Daqing ; Heilongjiang 163453 ; China)
中文关键词：叠前时间偏移 ; 偏移速度 ; 古龙断陷
英文关键词：Pre-stack time migration ; Migration velocity ; Gulong faulted depression
出版日期：2012-04-15
机构：成都理工大学能源学院;大庆油田有限责任公司人事部;
年：2012
期：04
出版单位：中国西部科技

摘要

古龙断陷位于松辽盆地西部断陷区,中浅层采集地震资料在深层反射能量弱、信噪比低,深层偏移距不够,造成深层成像困难,导致基底结构和地层分布特征认识不清,难以满足深层勘探。为此,我们开展了叠前时间偏移处理技术研究,本文在克希霍夫叠前时间偏移原理以及偏移速度模型精确建立方法的基础上,通过高密度自动速度分析、叠前时间偏移孔径试验及偏移距分组实验,讨论了影响叠前时间偏移成像效果的因素,选择合理的处理参数,对本区资料进行了处理。处理结果表明,与老剖面相比,新剖面深层的成像效果好。
Gulong faulted depression is located in the west faulted area of Songliao basin.The seismic data collected in the mid-shallow layer showed a weak signal-to-noise ratio,which caused the difficulty of deep imaging,leading to the failure of exploration of basement structure and strata distribution.Therefore,we conducted a research on the key technology in pre-stack time migration imaging under complicated deep geological conditions,based on Kirchhoff technology in pre-stack time migration and migration velocity model.We discussed the influencing factors of pre-stack time migration imaging,and selected reasonable processing parameters to analyze the data for this area by high density automatic speed analysis,pre-stack time migration aperture test,and the experiment of offset in groups.Results showed that the new deep profile imaging was better than old profile.

引文

[1]陈宝书.地震资料叠前偏移处理技术应用[J].中国海上油气,2001,15(5):361-364.
    [2]Wiggins W.Kirchhoff integral ext rapolation and migration of nonplanardata.Geophysics,1984,49(8):1239-1248.
    [3]马秀国.叠前时间偏移成像处理技术在焉耆盆地应用研究[J].石油地质与工程,2011,25(2):39-41.
    [4]辛可锋,王华忠,马在田.一种高精度的偏移速度分析方法[J].勘探地球物理进展,2002,25(3):20-26.
    [5]陆基孟.地震勘探原理(下册)[M].山东:石油大学出版社,2004:134-150.