摘要
根据我国的高分辨率地震勘探技术状况和经验总结，普遍认为提高分辨率的主要途径是以拓宽有效频率，丰富高频成分为原则。按照这个原则，在现有技术装备条件下，我们针对鄂尔多斯盆地北部沙漠区地震地质条件的特殊性，通过高分辨率野外采集技术攻关试验，取得了适合盆地北部沙漠区开展高分辨率野外采集的最有效方法——除采用“四小”（小药量、小道距、小排列、小组合距）之外，关键是“一高、二井下”（高频检波器，井下激发、井下接收）。攻关试验和生产实践表明“一高、二井下”所采集的资料经过“三高处理”，剖面质量得到进一步提高，整体反射面貌和目的层反射分辨率更加适合勘探需要，也是盆地北部沙漠区地震勘探高分辨率采集技术方法的新突破。
In accordance with the situation of high-resolution seismic exploration techniques in our country and the experiences summary, it is generally admitted that the main ways of improving the resolution are to broaden effective frequencies and enrich high-frequency components. Based on this principle we conducted an experiment on the high-resolution field acquisition techniques under the condition of existing technological equipments in view of the special seismogeological circumstances in the desert area of the northern Ordos basin. It is concluded that the most effective rnethod for high-resolution field acquisition in the area is to adopt downhole excitation and downhole receiving by using high-frequency geophones besides small charge size, short group interval, microspread, and small array distance. Experiments and productive practices demonstrate that the quality of data acquired by this way is further improved after high resolution,high signal-to-noise ratio and high fidelity processing. And the whole reflectlon appearance and resolution are more adapted to exploration demands. This is a new breakthrough in high-resolution seismic acquisition methods in the desert area of the northern Ordos basin.
出处
《石油物探》
EI
CSCD
北大核心
1998年第4期1-13,共13页
Geophysical Prospecting For Petroleum
关键词
沙漠区
高分辩率
采集技术
地震数据
地震勘探
desert area, high resolution, field acquisition technique, high frequency geophone
