准噶尔盆地两种不同高密度地震方法对比  

Comparison of two different high-density seismic technologies in Junggar basin

作　　者：尚新民[1] 王延光[2] 王胜阁[1] 柳光华[1] 李强[1] 谷玉田[2] SHANG XinMin;WANG YanGuang;WANG ShengGe;LIU GuangHua;LI Qiang;GU YuTian(Geophysical Research Institute of Shengli Oilfield,Sinopec,Dongying 257022,China;Shengli Oilfield Branch,Sinopec,Dongying 257022,China)

机构地区：[1]中国石化胜利油田分公司物探研究院,东营257022 [2]中国石油化工股份有限公司胜利油田分公司,东营257022

出　　处：《地球物理学进展》2022年第4期1585-1592,共8页Progress in Geophysics

摘　　要：准噶尔盆地主体为沙漠覆盖,周缘分布有砾石、农田、黄土及砂土.近几年来,中国石油在准噶尔盆地大力推行“两宽一高”地震技术,其核心为利用自主研发的低频可控震源,采用滑动扫描等高效采集技术,实现了宽频带、宽方位、高密度地震;中国石化在准噶尔盆地采用了炸药激发的高密度地震技术.本文在对两种高密度地震方法采用的观测方式、激发方式、接收方式进行对比的基础上,对两种不同高密度地震技术得到的地震记录、针对性处理技术、叠加及成像效果进行了对比研究,研究发现:炸药震源激发高密度地震单炮信噪比高,12.5 m×12.5 m面元、覆盖次数400次就能达到最佳成像效果,可控震源单台单次高效激发资料信噪比低,同样面元下,覆盖次数1000次以上才能达到最佳成像效果,研究结论对准噶尔盆地高密度地震方法选择具有指导意义.Junggar basin is mainly covered by desert,with gravel,farmland,loess and sand distributed around.In recent years,China National Petroleum Corporation(CNPC)has implemented the Broadband,Wide-azimuth and High-density(BWH)seismic prospecting in Junggar basin.The technology of self-developed low-frequency vibroseis and the high-efficiency slide sweeping seismic acquisition are the keys of the BWH acquisition.The other high-density seismic prospecting way is explosive-based acquisition by Sinopec in this area.Based on the comparison of two high-density seismic technologies on geometry,shot and receiving,this paper makes a comparative study in field records,processing technique,stack and imaging sections.Benefit from high S/N on field record,a geometry of 12.5 m×12.5 m bin size,400-fold is sufficient for best imaging when explosive shot.While a geometry of 12.5 m×12.5 m bin size requires 1000-fold at least to obtain equivalent imaging due to decreased S/N on high-efficiency vibroseis shot.This comparison pointed out a guideline for high-density seismic acquisition in this area.

关 键 词：高密度地震 可控震源 观测方式 覆盖次数 处理方法 

分 类 号：P631[天文地球—地质矿产勘探]