老油田城区极浅目的层三维地震勘探及效果
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摘要
在城区面积大、地表条件复杂、主要目的层埋藏极浅、地震资料信噪比低、障碍物遍布、人口密集等区域,野外采集资料的完整性难以保证,提高资料信噪比困难。通过特殊观测系统设计,利用高精度地理信息辅助选线选点,采取炸药震源与可控震源联合激发、电钻打眼埋置检波器等针对性的技术措施,取得了较好的勘探效果,填补了复杂城区地震资料空白,满足了油田公司开展综合调查研究和增储上产的需求。实践表明,该方法科学合理、可操作性强,为大面积城区极浅目的层地震勘探提供了借鉴。
It is difficult to acquire complete data in field and enhance the signal-to-noise (S/N) ratio of data in zones where urban area is large, near-surface conditions are complicated, main target layers are shallowly buried, S/N ratio of seismic data is low, obstacles are widely distributed, and the population are highly concentrated. Good results have been achieved in exploration, based on the design of special geometry, the selection of routes and points aided by high-precision aerophotos, the combined excitation of explosive source and vibroseis, and the embedment of geophones by using electric drill first. This fills the blank that there are no seismic data acquired in complicated city zones and meets the requirements of oilfield companies for conducting integrated research and increasing reserves and production. Practice shows that the approach is scientific and rational, and easy to operation, providing a good reference for seismic exploration in city zones with extra-shallow target layers.
It is difficult to acquire complete data in field and enhance the signal-to-noise (S/N) ratio of data in zones where urban area is large, near-surface conditions are complicated, main target layers are shallowly buried, S/N ratio of seismic data is low, obstacles are widely distributed, and the population are highly concentrated. Good results have been achieved in exploration, based on the design of special geometry, the selection of routes and points aided by high-precision aerophotos, the combined excitation of explosive source and vibroseis, and the embedment of geophones by using electric drill first. This fills the blank that there are no seismic data acquired in complicated city zones and meets the requirements of oilfield companies for conducting integrated research and increasing reserves and production. Practice shows that the approach is scientific and rational, and easy to operation, providing a good reference for seismic exploration in city zones with extra-shallow target layers.
引文
Andreas Cordsen,John W.Peirce,石油地球物理勘探局翻译,陆上三维地震勘探的设计与施工,1996。
[1]陆基孟.地震勘探原理[M].东营:石油大学出版社,1993
[1]陆基孟.地震勘探原理[M].东营:石油大学出版社,1993
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