新疆石油地质 ›› 1993, Vol. 14 ›› Issue (3): 228-234.

• 地球物理 • 上一篇    下一篇

准噶尔盆地沙漠区深层弱反射地震方法研究

刘治凡   

  1. 新疆石油管埋局地调处研究所 乌鲁木齐830016
  • 发布日期:2020-12-08

AN APPROACH OF DEEP WEAX SEISMIC REFLECTION FOR DESERT AREA IN JUNGGAR BASIN

Liu Zhifan   

  1. Reseurch Institute of Department of Geologic Survey, Xin jiangPelroleum Administration Bureau, Urumqi 830016
  • Published:2020-12-08

摘要: 新疆石油地调处近几年在准噶尔盆地沙漠区为获得5000m以下深层地震反射信息所进行的试验成果指出,浅井组合、可控震源激发、弯线排列、沙丘曲线、初至叠加和炮道静校正是获得深反射信息的基本手段;径向信号增强、多项式拟合去噪方法对于提高信噪比有明显作用;寬线叠加对于查清二叠糸与下伏地层的接触关系、压制层间多次波有明显作用。

关键词: 信噪比, 高次覆盖, 弯线选点激发, 静校正, 沙丘曲线, 初至叠加, 去噪

Abstract: To obtain deep seismic reflection data (> 5 000m),many test results in recent years from desert area in JunggarBasin show that shallow well paltern shooting, vibroseis shooting, tortuous spread,sand dune curves, first arrival stackand shotpoint-seismic channel statics are besic means 1o get deep reflection. These methods such as radia1 signal en-hancement, multinomial analogy t0 remove noises are of significant effects on signal-to-noise ratio improvement.while wide-Jine stack has obvious effects on finding out the contacts between the Permian and underlying strata and onsuppressing interbed multiples.

Key words: Signal-to-noise ratio, Supper-multipie stack, Tortuous selected shooting, Statics Sand dune curve, First arIival stack, Remove noise