准中沙漠区地震资料提高分辨率处理技术及应用  

A case study of resolution enhancement of seismic data in the desert area of the Junggar Basin

作　　者：柳光华[1] 赵爱国[1] 王胜阁[1] LIU Guang-hua;ZHAO Ai-guo;WANG Sheng-ge(Geophysical Research Institute of Shengli Oilfield Branch Co., Dongying Shandong 257022, China)

机构地区：[1]胜利油田分公司物探研究院

出　　处：《油气地球物理》2019年第4期26-31,共6页Petroleum Geophysics

摘　　要：Z6井三维地区是准噶尔盆地中部区块下一步增储上产的主要阵地。地表以沙漠和农田为主,近地表低降速带的速度和厚度不均匀,目的层埋深大,导致原始单炮子波特性差异大,影响了地震资料最终的分辨率。以高密度宽方位三维地震数据为基础,利用层析静校正和稳健反褶积技术,较好地解决了地表及近地表问题,地震子波特征一致性更强,信号有效频带得到合理展宽,地震分辨率显著提高,为该区侏罗系及三叠系的储层描述提供了资料基础。The 3D area of the Z6 well is the main position for the increasing reserves and production in the central block of the Junggar Basin. The surface conditions mainly include desert and farmland. The velocity and thickness of the weathering near the surface are uneven. And the buried depth of the target is large. All these leads to a large difference in the wavelet characteristics of the original single shot, which affects the final resolution of the seismic data. Based on the high-density and wide-azimuth 3D seismic data, the problems caused by the surface and near-surface are solved by the tomographic static correction and robust deconvolution. The consistency of the seismic wavelet characteristics is stronger. The effective band of the signal is reasonably broaden. And the seismic data resolution is improved greatly. A base of data for the reservoir description of the Jurassic and Triassic in this area is provided.

关 键 词：分辨率 处理技术 层析静校正 稳健反褶积 准中沙漠区 

分 类 号：P631.443[天文地球—地质矿产勘探]