松辽盆地北部深层火山岩地震成像技术
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摘要
松辽盆地北部营城组发育大范围巨厚火山岩,并且埋藏在4 000 m以下。由于火山岩储层埋藏深,地层速度横向变化大,造成地震剖面信噪比低,成像不清晰。这里分析了深层火山岩地震资料特点和原因,并在此基础上提出了深层火山岩处理的核心技术,是叠前去噪、信号增强和叠前成像。通过采用叠前组合去噪,高密度自动速度分析技术,优势偏移距叠加技术,共反射面元叠加技术和叠前时间偏移等处理方法,在松辽北部深层火山岩地震资料目标处理中效果明显,资料品质较老地震剖面有了显著提高,说明了该技术的可行性和实用性。
Yingcheng formation which buried mostly deeper than 4 000 m is abundant in volcanic rock in the north of Songliao Basin.Because the volcanic rock reservoir is deep and formation velocity varies greatly,the seismic section is low S/N and the imaging of the object is generally bad.The article analyses the characteristic of seismic and the reason for it,and summarizes the key problem and technology of deep volcanic rock seismic data processing which include pre-stack de-noising,signal enhancing and pre-stack migration.Then high-dense automatic velocity analysis,priority offset stack,CRS and PSTM are used in the north of Songliao basin.From a comparison with former seismic section,the quality of seismic data of deep volcanic rock is increased highly.The result demonstrated that the approaches applied is practical and valid.
Yingcheng formation which buried mostly deeper than 4 000 m is abundant in volcanic rock in the north of Songliao Basin.Because the volcanic rock reservoir is deep and formation velocity varies greatly,the seismic section is low S/N and the imaging of the object is generally bad.The article analyses the characteristic of seismic and the reason for it,and summarizes the key problem and technology of deep volcanic rock seismic data processing which include pre-stack de-noising,signal enhancing and pre-stack migration.Then high-dense automatic velocity analysis,priority offset stack,CRS and PSTM are used in the north of Songliao basin.From a comparison with former seismic section,the quality of seismic data of deep volcanic rock is increased highly.The result demonstrated that the approaches applied is practical and valid.
引文
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[2]操应长,姜在兴,邱隆伟.山东惠民凹陷741块火成岩油藏储集空间类型及形成机理探讨[J].岩石学报,1999,15(1):129.
[3]任作伟,金春爽.辽河坳陷洼609井区火山岩储集层的储集空间特征[J].石油勘探与开发,1994,26(4):54.
[4]贾承造.松辽盆地深层天然气勘探研讨会报告集[M].北京:石油工业出版社,2004.
[5]杨辉,张研,刘晓,等.松辽盆地北部徐家围子断陷航磁异常特征及油气地质意义[J].石油地球物理勘探,2006,41(1):97.
[6]谢晓安,周卓明.松辽盆地深层天然气勘探实践与勘探领域[J].石油与天然气地质,2008,29(1):113.
[7]罗静兰,林潼,杨知盛,等.松辽盆地升平气田营城组火山岩岩相及其储集性能控制因素分析[J].石油与天然气地质,2008,29(6):748.
[8]朱伟强,李卫忠,王成礼,等.济阳坳陷深层地震资料处理技术及应用[J].石油物探,2002,4(2):160.
[9]张颖,余云英,陈立康.东部油区深层勘探中的地震处理技术[J].勘探家,1999,4(2):50.
[10]韩革华,漆立新,李宗杰,等.塔河油田奥陶系碳酸盐岩缝洞型储层预测技术[J].石油与天然气地质,2006,27(6):860.
[11]廖刃,泌阳凹陷深层系地震资料处理方法探讨[J].河南石油,2000,14(2):7.
[12]刘俊峰,裴江云.利用扩大反射面元方法压制随机噪音[J].石油与天然气地质,2002,21(4):78.
[13]吴小羊,刘天佑,魏伟.二维菲涅耳带共反射面元叠加方法研究[J].地球物理学报,2008,51(6):1892.
[14]吴小羊,刘天佑,魏伟.共反射面元叠加在复杂地区地震成像中的应用[J].新疆石油地质,2006,27(5):604.
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