辽河青龙台地区高密度全数字三维地震采集技术及效果

发布时间：2018-05-29 03:44

本文选题：辽河坳陷 + 数字检波器　；参考：《中国石油勘探》2017年01期

【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。
[Abstract]:Liaohe Oilfield has gradually entered the stage of high mature exploration and development. Conventional seismic exploration is difficult to meet the needs of research on microstructures, small faults, small fault blocks and thin reservoirs, and the signal-to-noise ratio of seismic data. Higher resolution and fidelity are required. In order to meet the needs of evaluation and development of old oil fields, Liaohe Oilfield carried out high-density full-digital 3D seismic acquisition in Azure Dragon station in 2014. Through the test, the high density digital 3D seismic acquisition technology is formed, which is small area, high coverage, wide azimuth, combined excitation of explosive source and vibroseis, single point digital geophone receiving and low noise receiving. The quality of the new seismic data is obviously improved, the frequency band of the single shot data is expanded by 21 ~ 25 Hz than the old data, and the frequency band of the field stacking profile is broadened by 12 ~ 14 Hz compared with the old data. It provides good seismic data for Azure Dragon station area, and obtains better evaluation and development effect. It also accumulates experience for the whole digital 3D seismic acquisition in the future.
【作者单位】：中国石油辽河油田公司勘探开发研究院;中国矿业大学(北京)地球科学与测绘工程学院;
【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)
【分类号】：P631.4

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