中深层地震采集方法研究——以东海盆地X海域为例
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摘要
东海盆地X海域由于地质条件复杂,原有地震资料有效波能量不足,层间多次干扰严重,长期得不到A地层以下深部有效反射信号,致使深部地层成像困难。在分析深层成像困难的机理基础上,通过对多套参数的实验效果进行对比分析,认为得到X海域深部有效波波反射并成像的主要途径是寻找频带范围集中在40Hz以下、能量足够大的枪阵,并对采集参数的传统研究提出了新的认识。
Due to complicated geological conditions and lacking of existed seismic data in X trough indicated insufficient energy of effective wave and serious interbedding multiple interference,the seismic data in the deep X trough have not been acquired for a long time,which caused deep reflection and imaging difficult below Stratum A.On the basis of analysis of difficult imaging mechanism in the deep formation,by comparing the experimental effects of many sets of parameters it is considered that the major way to acquire effective image in the deep formation is to seek the large-volume gun array with the energy concentration below 40Hz.It provides a new understanding for traditional way of data acquisition.
Due to complicated geological conditions and lacking of existed seismic data in X trough indicated insufficient energy of effective wave and serious interbedding multiple interference,the seismic data in the deep X trough have not been acquired for a long time,which caused deep reflection and imaging difficult below Stratum A.On the basis of analysis of difficult imaging mechanism in the deep formation,by comparing the experimental effects of many sets of parameters it is considered that the major way to acquire effective image in the deep formation is to seek the large-volume gun array with the energy concentration below 40Hz.It provides a new understanding for traditional way of data acquisition.
引文
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[2]杨红霞.地震数据采集技术进展[J].勘探地球物理进展,2003,26(5-6):463～468.
[3]刘振宽,刘俊峰,宋宗平,等.海拉尔盆地三维地震采集技术[J].石油物探,2004,43(4):395～400.
[4]刘百红,吴东国,郑四连,等.通-南-巴三维地震采集参数设计方法[J].物探与化探,2006,30(4):312～318.
[5]曾久岭,沈然清.东海西湖凹陷的基底性质[J].海洋石油,2000,(3):9～15.
[6]梁连喜,蒲庆南,梁若冰,等.东海西湖海域地质结构与局部构造特征[J].海洋石油,1997,(3):1～6.
[7]陈琳琳,王文强.东海陆架盆地西湖海域深层烃源岩探讨[J].海洋石油,1999,(2):1～8.
[8]赵文津,K.D.纳尔逊.印度板块俯冲到藏南之下的深反射证据[J].地球学报-中国地质科学院院报,1996,17(2):131～137.
[9]杨宝俊,唐建人,李勤学,等.松辽盆地深部反射地震探查[J].地球物理学进展,2001,16(4):11～17.
[10]徐明才,高景华.关于深反射地震剖面采集参数的讨论[J].物探与化探,1994,18(2):113～120.
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