宽线观测大组合接收技术在阜康断裂带的应用
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摘要
阜康断裂带是准噶尔盆地油气勘探的有利区带。该区带地表起伏剧烈,地层倾角大,表层破碎,激发和接收条件差;面波、折射波发育,次生线性干扰强;断层发育,地腹构造复杂;地层反射波组连续性及其成像效果差,三叠系及以下地震资料品质普遍很差,二叠系特别是石炭系反射的信噪比很低,难以准确成像。针对工区特点,采用宽线采集方法大幅度提高有效叠加次数和增强抗干扰能力,提高构造主体成像效果;利用检波器大组合压制多种干扰,提高单炮信噪比。应用效果表明,该采集方法能够提高深层反射资料的信噪比和主体构造部位的成像效果。
The Fukang Fault Zone is favorable to oil and gas accumulation in Zhunger Basin.Rugged topography and steep dip angle of formations result in adverse shooting and receiving conditions.Surface waves and refraction waves bring about strong secondary linear interference.Well-developed faults result in poor continuity of reflection events.The quality of seismic data is poor below the Triassic,and the Permian reflections are of low S/N,the Carboniferous is even worse.Wide-line acquisition method was adopted to enhance the coverage and diminish interferences.Large array was used to suppress noises.Desired results have been achieved by using the proposed methods.
The Fukang Fault Zone is favorable to oil and gas accumulation in Zhunger Basin.Rugged topography and steep dip angle of formations result in adverse shooting and receiving conditions.Surface waves and refraction waves bring about strong secondary linear interference.Well-developed faults result in poor continuity of reflection events.The quality of seismic data is poor below the Triassic,and the Permian reflections are of low S/N,the Carboniferous is even worse.Wide-line acquisition method was adopted to enhance the coverage and diminish interferences.Large array was used to suppress noises.Desired results have been achieved by using the proposed methods.
引文
1胡杰,张金岗,张立军,等.柴达木盆地复杂山地采集技术及效果[J].中国石油勘探,2006,11(6):51～58
2赵军国,宋玉龙,魏福吉,等.山前带地震采集技术研究——新疆和田桑株地区采集实例[J].石油物探,2003,42(2):224～226
3张晓斌,罗卫东,唐涛,等.西部地区复杂山地地震采集技术[J].天然气工业,2007,27(增刊A):67～69
4李庆忠.组合效应对反射波的改造与压制[J].石油地球物理勘探,1984,19(1):1～20
5李庆忠,魏继东.高密度地震采集中组合效应对高频截止频率的影响[J].石油地球物理勘探,2007,42(4):363～369
2赵军国,宋玉龙,魏福吉,等.山前带地震采集技术研究——新疆和田桑株地区采集实例[J].石油物探,2003,42(2):224～226
3张晓斌,罗卫东,唐涛,等.西部地区复杂山地地震采集技术[J].天然气工业,2007,27(增刊A):67～69
4李庆忠.组合效应对反射波的改造与压制[J].石油地球物理勘探,1984,19(1):1～20
5李庆忠,魏继东.高密度地震采集中组合效应对高频截止频率的影响[J].石油地球物理勘探,2007,42(4):363～369
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