浅层反射静校正法在准噶尔盆地巨厚沙漠区的应用  

APPLICATION OF THE SHALLOW LAYER REFRACTION STATICS METHOD IN THE THICK DESERT AREA IN JUNGGAR BASIN

作　　者：孔凡勇 苏卫民 张秀丽 王利业 李见 许文斌 

机构地区：[1]中国石油东方地球物理公司新疆物探处,新疆乌鲁木齐830016

出　　处：《新疆石油天然气》2015年第2期21-24,2,共4页Xinjiang Oil & Gas

基　　金：国家科技重大专项(2011ZX05019-004);东方地球物理公司"基于高密度地震数据浅层反射波的静校正方法研究"项目(11-05-2014)资助

摘　　要：在准噶尔盆地东部大沙漠区,折射波非常不稳定,导致常规基于初至的静校正方法效果不佳。在该区的生产单炮上可以采集到清晰的浅层反射波,为使用反射波进行静校正提供了较好的资料基础。浅层反射波静校正一般采用叠加法或拟合法,这两种方法不适合于准噶尔盆地腹部剧烈起伏的大沙漠区。为解决该区静校正问题,提出了一种直接将拾取的反射波旅行时分离为炮检点的单程旅行时的方法,再通过沙丘曲线将分离出的炮检点时间转换成低降速带厚度,即可计算出静校正量。通过在准噶尔盆地东部沙漠区进行试用,效果比较理想。The unstable refraction waves in the deep desert area in Eastern Junggar Basin lead to the poor effect of the conventional first-break based statics method;however,clear shall-layer refraction waves can be acquired through single-shot production in the area,which has provided a good data basis for performing statics using refraction waves.Shallow-layer refraction statics adopt two methods in general;Stacking method or fitting method,which are unsuitable for the large violently fluctuant desert area in deep Junggar Basin.In this paper,the author proposes a method to calculate statics.It separates the picked refraction wave travel time into the single-way travel time of source-receive points directly and then convents the separated source-receiver point time into the LVL thickness.Trials conducted in the desert area in Eastern Junggar Basin show an ideal effect.

关 键 词：静校正 浅层反射 旅行时分离 

分 类 号：P631[天文地球—地质矿产勘探]