复杂断裂带高精度地震采集技术及效果  

High-precision Seismic Data Acquisition Technique and Effectiveness Analysis in Complex Fault Zones

作　　者：孙永强[1] 晁如佑[1] 宗晶晶[1] 李亚斌[1] 李金莲[1] 付英露[1] 

机构地区：[1]江苏石油勘探局地球物理勘探处,江苏扬州225007

出　　处：《石油天然气学报》2011年第7期88-91,3,共4页Journal of Oil and Gas Technology

摘　　要："十一五"期间,江苏油田相继在GY凹陷的HL、ZW和WB断裂带部署了YA、ZD、ZL和CB共4块高精度三维地震采集区域。3个断裂带断层发育,构造破碎,火成岩对下伏地层能量屏蔽严重,地震资料品质较差;地表条件复杂,激发、接收条件横向变化大。为此,从观测系统、激发和接收3方面入手开展方法研究,形成了面向目标的观测系统优化技术、以精细表层结构调查为重点的最佳激发参数优选技术、基于保护高频成分的接收等技术,寻找到了一套适合GY凹陷复杂断裂带的高精度地震采集技术系列,达到了落实小断层分布,提高地震资料品质的目的。High-precision seismic data acquisition was performed on Fault Blocks YA,ZD,ZL and CB at HL,ZW and WB Fault Zones of in Gaoypu Depression by JOECO in the period of 11th National Five Year Plan.Fault zones were developed and structures were breaking the underlying energy was shielded by volcanic rocks and there were big lateral changes of shooting and receiving on the surface etc,which resulted in poor quality of seismic data.Aiming at such problems,high-precision 3D seismic data acquisition techniques were studied from geometry,shooting and receiving parameters.A series of high-precision seismic data acquisition techniques were formed,including target geometry optimization technique,optimal shooting parameters selecting technique focusing on detail surface structure investigation,receiving parameter optimization technique based on protecting high frequency signal.In Gaoyou Depression,a series of high-precision seismic data acquisition techniques are applied and the purpose to obtain seismic profiles with high S/N ratio,abundant and high frequency information and to identify small fault distribution is achieved.

关 键 词：复杂断裂带 GY凹陷 高精度 地震采集方法 

分 类 号：P631[天文地球—地质矿产勘探]