南疆沙漠区单炮记录间品质差异的原因分析及解决方法  

Analysis and solution of quality difference of single shot record in desert area of South Xinjiang

作　　者：张伟[1] 宋智强[2] ZHANG Wei;SONG Zhiqiang(SINOPEC Geophysical Corp.,Beijing100010,China;Shengli Branch,SINOPEC Geophysical Corp.,Dongying,Shandong257100,China)

机构地区：[1]中国石化地球物理公司,北京100010 [2]中国石化地球物理公司胜利分公司,山东东营257100

出　　处：《石油地球物理勘探》2023年第3期558-566,共9页Oil Geophysical Prospecting

基　　金：中国石化集团公司科研项目“准中P-T地震勘探关键技术研究”(P22129)资助。

摘　　要：南疆沙漠区地层平缓,同相轴连续,从浅到深层位也较齐全,但常会遇到“不同位置的原始单炮记录间同相轴信息相差较大”的现象,包括同相轴的数量、清晰度、相对能量关系等,表现为同一条同相轴在某些炮记录中有,而在另一些炮记录中不可见,或者在有的单炮记录中非常清晰,而在另外单炮记录中非常微弱,给人感觉这些同相轴在单炮记录间“上蹿下跳”,而且人们在整个工区都难以挑选到品质相当的典型单炮记录做展示。究其原因,本文分析认为,各个排列上的沙丘鸣震不同,导致单炮资料品质差异大。将沙丘鸣震压制之后,单炮记录的品质趋于统一。同时,通过理论计算和实际资料对比分析,厘清了该区沙丘鸣震波场特征,并据此进一步完善了相应的压制沙丘呜震方法。In the desert area of South Xinjiang,the stratum is gentle with the continuous event and the depths from shallow to deep are relatively complete.However,there is often a phenomenon that the information of the events between the original single shots at different positions is quite different in many aspects including the number,definition,and relative energy relationship.It is shown that the same event exists in one shot but does not exist in another shot.Or,it is very clear in some single shots,but appears very weak in other single shots,seeming that these events“jump up and down”between single shots.In this case,the construction technicians are struggling to select the typical single shot of comparable quality and display it in the work area.It is inferred that the sand dune ringing in each arrangement is various,leading to the prominent difference in the quality of single shot data.The quality of single shot recording tends to be unified after suppressing the sand dune ringing.At the same time,the characteristics of sand dune ringing wave field are clarified through theoretical calculation and comparative analysis of actual data.On this basis,the corresponding suppression methods are further improved.

关 键 词：南疆沙漠区 单炮记录同相轴差异 不同地表位置 沙丘鸣震 共检波点道集 线性噪声压制 

分 类 号：P631[天文地球—地质矿产勘探]