塔里木盆地西南坳陷巨厚黄土区地震采集技术
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摘要
塔里木盆地西南坳陷厚黄土区一直以来都是地震勘探的难点。受地表巨厚黄土的影响,激发和接收条件较差,地震波吸收和衰减严重,地震资料信噪比低,严重影响该区油气勘探的发展。为落实非地震勘探发现的柯西2号构造,在该区进行了二维地震采集技术攻关。针对工区特殊的表层结构,通过综合试验选定了最优化的组合激发参数,同时采取了检波器大基距组合接收、宽线观测系统和精细表层调查等一系列技术措施,取得了较好的效果,所获得的地震剖面品质较以往有了质的改善,较好地完成了地质任务。
The thick loess area in southwest depression of Tarim basin is always one of the most complex regions for seismic survey.Being covered with thick loess,the shooting and receiving conditions are poor,resulting in severe absorption and attenuation of seismic waves as well as low signal-to-noise ratio.In order to find out Kexi-2 structure found by non-seismic prospecting,such 2D seismic acquisition techniques as array shooting,long geophone array receiving and wide-line acquisition ones are all applied in this area.The results show that the seismic profile acquired is of much higher quality than ever before,proving these techniques are effective and practicable.
The thick loess area in southwest depression of Tarim basin is always one of the most complex regions for seismic survey.Being covered with thick loess,the shooting and receiving conditions are poor,resulting in severe absorption and attenuation of seismic waves as well as low signal-to-noise ratio.In order to find out Kexi-2 structure found by non-seismic prospecting,such 2D seismic acquisition techniques as array shooting,long geophone array receiving and wide-line acquisition ones are all applied in this area.The results show that the seismic profile acquired is of much higher quality than ever before,proving these techniques are effective and practicable.
引文
1)吕景峰.塔西南坳陷柯西-甫沙地区二维地震勘探采集试验总结,2002.
[1]吕公河,张庆淮,段卫星,等.黄土塬地区地震勘探采集技术[J].石油物探,2001,40(2):84-91.
[2]程洪涛,黄用勤,胡仁东.黄土塬地区地震勘探激发技术研究[J].工程地球物理学报,2005,6(2):460-465.
[3]赵延江.黄土塬地区地震勘探激发技术探讨[J].石油物探,2006,45(6):646-650.
[4]梁传坤,韩军.提高地震分辨率的检波器组合设计[J].物探装备,2006,16(1):29-32.
[5]刘新文,严峰,施海峰,等.复杂山地提高信噪比地震采集方法探讨[J].天然气工业,2007,27(增刊A):61-62.
[6]任文军,孙景汪,钱汉林,等.黄土山地多线地震采集方法[J].石油地球物理勘探,2002,37(增刊):5-8.
[7]孙景旺,杜中东,任文军,等.鄂尔多斯盆地黄土塬区多线地震采集技术[J].石油物探,2003,42(4):505-507.
[1]吕公河,张庆淮,段卫星,等.黄土塬地区地震勘探采集技术[J].石油物探,2001,40(2):84-91.
[2]程洪涛,黄用勤,胡仁东.黄土塬地区地震勘探激发技术研究[J].工程地球物理学报,2005,6(2):460-465.
[3]赵延江.黄土塬地区地震勘探激发技术探讨[J].石油物探,2006,45(6):646-650.
[4]梁传坤,韩军.提高地震分辨率的检波器组合设计[J].物探装备,2006,16(1):29-32.
[5]刘新文,严峰,施海峰,等.复杂山地提高信噪比地震采集方法探讨[J].天然气工业,2007,27(增刊A):61-62.
[6]任文军,孙景汪,钱汉林,等.黄土山地多线地震采集方法[J].石油地球物理勘探,2002,37(增刊):5-8.
[7]孙景旺,杜中东,任文军,等.鄂尔多斯盆地黄土塬区多线地震采集技术[J].石油物探,2003,42(4):505-507.
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