井间地震资料的频谱分析及其与地面地震资料的联合应用
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摘要
井间地震单一技术解决问题的局限性制约了其在油田开发中的应用。对井间地震资料频谱随偏移距变化、不同波场处理过程后频谱变化、反射波成像过程后频谱变化等进行了系统的分析,并与对应的地面地震剖面频谱及子波频谱进行了比较,研究了分辨率与频谱特征参数的关系。结果表明:井间地震资料的处理技术和处理成果是可靠的,与地面地震在同一尺度上的性质一致,且存在叠合频带;井间地震资料频谱的变化主要是由于地层对地震波的吸收作用及形成AVA道集时的空间转换和叠加作用;主频、高截频、频宽是实际地震资料分辨率的主要表征参数,高分辨率地震资料的低频信息比低分辨率的少。井间地震资料和地面地震资料的联合应用有其理论的可行性和实现基础,并有多种方式,对于提高对地质目标的分辨能力和分辨可靠性有重要的意义。
Limitation of single crosswell seismic technique restricts its application in oilfield development.The changes of frequency spectrum on crosswell seismic data with the shift of offset,different wave field treatment and reflected wave imaging were analyzed systematically.Then the frequency spectrum and the spectrum of wavelet were compared between crosswell seismic profile and surface seismic profile.The relation between resolution and characteristic parameters of the frequency spectrum was studied.The results show that;the processing technology and result on cross-well data is relatively reliable,it has the same property with the surface seism at the same scale and folding frequency band exists;the change of frequency spectrum of crosswell seismic data is caused by absorption of strata on seismic wave and space transfer and superimpose during the formation of AVA gather;the spectrum parameters,which means dominant frequency and high cut-off frequency,spectrum width,can effectively indicate the resolution of seismic data,and the high resolution seism has less information of low frequency than the low resolution seismic;the combined application of crosswell and surface seismic data is feasible,which is significant for the research of high resolution of seism.
Limitation of single crosswell seismic technique restricts its application in oilfield development.The changes of frequency spectrum on crosswell seismic data with the shift of offset,different wave field treatment and reflected wave imaging were analyzed systematically.Then the frequency spectrum and the spectrum of wavelet were compared between crosswell seismic profile and surface seismic profile.The relation between resolution and characteristic parameters of the frequency spectrum was studied.The results show that;the processing technology and result on cross-well data is relatively reliable,it has the same property with the surface seism at the same scale and folding frequency band exists;the change of frequency spectrum of crosswell seismic data is caused by absorption of strata on seismic wave and space transfer and superimpose during the formation of AVA gather;the spectrum parameters,which means dominant frequency and high cut-off frequency,spectrum width,can effectively indicate the resolution of seismic data,and the high resolution seism has less information of low frequency than the low resolution seismic;the combined application of crosswell and surface seismic data is feasible,which is significant for the research of high resolution of seism.
引文
[1]陈世军,刘洪,周建宇,等.井间地震技术的现状与展望[J].地球物理学进展,2003,18(3):524-529.
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[5]乔玉雷,王延光,李九生,等.对井间地震反射波成像资料的初步认识[J].石油物探,2006,45(3):272-276.
[6]何惺华.对井间地震反射波的分析[J].石油物探,2006,45(5):520-526.
[7]尤少燕,时应敏,乔玉雷.利用多尺度资料进行油藏地质建模——以樊124区块为例[J].油气地质与采收率,2005,12(3):15-17.
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[10]裴正林.井间地震层析成像的现状与进展[J].地球物理学进展,2001,16(3):91-97.
[11]孔庆丰,左建军,魏国华.井间地震下行反射波成像方法初探[J].天然气工业,2007,27(增刊A):107-108.
[12]汪兴旺,杨勤海,孙党生,等.岩溶探测中井间地震波层析成像的应用[J].物探与化探,2008,32(1):105-107.
[13]曹辉,郭全仕,唐金良,等.井间地震资料特点分析[J].勘探地球物理进展,2006,29(5):312-317.
[14]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993.
[15]许卫平.关于开发地震技术发展的几点思考[J].石油物探,2002,41(1):11-14.
[16]许丽,刘磊,吴长双.应用井间地震资料建立砂泥岩薄互层地质模型[J].石油地球物理勘探,2006,41(1):58-61.
[2]陈世军,周建宇,王延光,等.井间地震技术在樊124井区的应用[J].石油物探,2003,42(3):369-373.
[3]王秀玲,王延光,季玉新,等.胜利油田盐家地区井间地震资料应用研究[J].石油物探,2005,44(4):362-366.
[4]时应敏,乔玉雷,王慧.井间地震地质分辨能力浅析[J].油气地质与采收率,2005,12(5):33-35.
[5]乔玉雷,王延光,李九生,等.对井间地震反射波成像资料的初步认识[J].石油物探,2006,45(3):272-276.
[6]何惺华.对井间地震反射波的分析[J].石油物探,2006,45(5):520-526.
[7]尤少燕,时应敏,乔玉雷.利用多尺度资料进行油藏地质建模——以樊124区块为例[J].油气地质与采收率,2005,12(3):15-17.
[8]曹辉,郭全仕,唐金良,等.井间地震反射波资料处理[J].石油物探,2006,45(5):514-519.
[9]孔庆丰,左建军,魏国华,等.井间地震资料处理方法研究与应用[J].物探与化探,2006,30(6):533-537.
[10]裴正林.井间地震层析成像的现状与进展[J].地球物理学进展,2001,16(3):91-97.
[11]孔庆丰,左建军,魏国华.井间地震下行反射波成像方法初探[J].天然气工业,2007,27(增刊A):107-108.
[12]汪兴旺,杨勤海,孙党生,等.岩溶探测中井间地震波层析成像的应用[J].物探与化探,2008,32(1):105-107.
[13]曹辉,郭全仕,唐金良,等.井间地震资料特点分析[J].勘探地球物理进展,2006,29(5):312-317.
[14]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993.
[15]许卫平.关于开发地震技术发展的几点思考[J].石油物探,2002,41(1):11-14.
[16]许丽,刘磊,吴长双.应用井间地震资料建立砂泥岩薄互层地质模型[J].石油地球物理勘探,2006,41(1):58-61.
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