辽河青龙台地区高密度全数字三维地震采集技术及效果  

High-density digital 3D seismic acquisition technology and its application results in Qinglongtai area, Liaohe Oilfield

作　　者：李明生[1] 李雅楠[2] 董文波[1] 

机构地区：[1]中国石油辽河油田公司勘探开发研究院 [2]中国矿业大学(北京)地球科学与测绘工程学院

出　　处：《中国石油勘探》2017年第1期106-112,共7页China Petroleum Exploration

基　　金：国家自然科学基金项目"高煤级煤层气储层应力敏感性及控制机理"(41172145)

摘　　要：辽河油田逐步进入高成熟勘探开发阶段,常规地震勘探难以满足对微构造、小断层、小断块、薄储层等研究的需要,对地震资料的信噪比、分辨率和保真度等提出了更高的要求。为了满足老油田评价开发的需要,2014年辽河油田在青龙台地区进行高密度全数字三维地震采集攻关。经过试验攻关,形成了小面元、高覆盖、宽方位、炸药震源与可控震源结合激发、单点数字检波器接收、低噪声接收的高密度全数字三维地震采集技术。新获取地震资料较老资料品质有明显提高,单炮资料频带比老资料拓宽21~25Hz,现场叠加剖面频带比老资料拓宽12~14Hz。为青龙台地区提供了较好的地震资料,并取得较好的评价开发效果,为以后全数字三维地震采集工作积累了经验。As the Liaohe Oilfield gradually enters the high-maturity exploration and development stage, it is difficult to research the microstructures, minor faults, small fault blocks and thin reservoirs by means of conventional seismic exploration technologies, and the seismic data is highly required in terms of signal-to-noise ratio, resolution and fidelity. In 2014, high-density digital 3D seismic acquisition technology was tested in the Qinglongtai area, the Liaohe Oilfield, for the purpose of evaluation and development of old oilfields. Based on experimental research, the high-density digital 3D seismic acquisition technology was developed with the features of small surface element, high folds, wide azimuth, dynamite source-vibrator combined excitation, single-point digital geophone receiving and low-noise receiving. Compared with the old data, the newly acquired seismic data is much better in quality. The frequency band ratio of single shot data is 21-25 Hz wider and the frequency band ratio of stack section is 12-14 Hz wider. The proposed technology provides better seismic data of the Qinglongtai area, so good evaluation and development results are obtained. It can be used as the reference for the digital 3D seismic acquisition in the future.

关 键 词：辽河坳陷 数字检波器 高分辨率 高密度 覆盖次数 宽方位 

分 类 号：P631.4[天文地球—地质矿产勘探]