准噶尔盆地W_X断裂带三维地震资料连片处理效果分析
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摘要
W_X断裂带主要探区已基本实现三维地震覆盖,但多为历年积累的小三维区块,不利于对探区的整体认识和评价,本次使用常规处理和叠前时间偏移等方法对小三维资料进行了连片处理。运用频谱分析、信噪比分析等技术对连片处理前后的地震资料进行了详细的对比分析,新三维资料消除了区块边界效应,提高了资料信噪比和分辨率,展示了完整的区域构造、断裂系统及上超、削截等地质现象,为地震资料的精细解释提供了高品质的数据体,并为下一阶段该区的老井复查、新圈闭落实以及探井部署提供了可靠的资料保障。
3D seismic data have been acquired in the main prospecting region at the W-X fault zone,but many of them were shot in small 3D blocks in previous years,which was not suitable for acreage assessment as a whole.Convention processing methods and prestack time migration was used to tie-processing for the small 3D blocks.Spectral analysis and signal-to-noise ratio analysis was employed and the boundary effect was eliminated.As a result of enhancement of signal-to-noise ratio and improvement of resolution of the data,the overall regional structure,fault system,onlap and pinch out etc were clearly revealed.It provided high quality of data for detail seismic interpretation,reexamination of old wells,recognition of new traps and design of new exploration wells in the future.
3D seismic data have been acquired in the main prospecting region at the W-X fault zone,but many of them were shot in small 3D blocks in previous years,which was not suitable for acreage assessment as a whole.Convention processing methods and prestack time migration was used to tie-processing for the small 3D blocks.Spectral analysis and signal-to-noise ratio analysis was employed and the boundary effect was eliminated.As a result of enhancement of signal-to-noise ratio and improvement of resolution of the data,the overall regional structure,fault system,onlap and pinch out etc were clearly revealed.It provided high quality of data for detail seismic interpretation,reexamination of old wells,recognition of new traps and design of new exploration wells in the future.
引文
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[2]严建国,程庆甫.潜北断裂带三维连片处理方法研究[J].江汉石油学院学报,2004,26(J):54～55
[3]王晓燕,马建波,姜忠良,等.桥口南—徐集地区三维地震资料连片处理技术[J].断块油气田,2003,10(3):19～22
[4]吴建云,常建华,王秀.全三维连片处理技术的应用研究[J].物探与化探,1999,23(6):435～442
[5]武恒志,孟闲龙,朱允辉,等.准噶尔盆地腹部侏罗系岩性油气藏勘探实践与探讨[J].中国西部油气地质,2005,1(1):26～28
[6]张颖,乐金,阎世信,等.三维地震资料处理处理技术及应用效果[J].石油勘探与开发,2002,29(6):58～60
[7]孟凡冰,计平,王建军,等.叠前时间偏移在三维地震资料连片处理中的应用实例[J].勘探地球物理进展,2003,26(3):211～215
[8]王西文,周立宏.三维地震资料拼接中的地震子波处理[J].石油物探,2002,41(4):448～451
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