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川东北TJ地区宽频宽方位三维地震采集技术 被引量:3

Wide frequency and wide azimuth 3D seismic acquisition in TJ area,Northeast Sichuan Basin
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摘要 川东北TJ地区油气资源丰富,地震地质条件复杂。其主要目的层小断裂发育,裂缝孔隙性储层各向异性严重;近地表疏松砂岩发育,激发频带窄;地表植被密集,高频噪声发育。针对该区地震地质条件,基于"两宽一高"地震勘探技术已取得的良好效果,采纳宽频、宽方位的技术思路,进行了针对小断裂和各向异性的观测系统设计及论证,以改善储层成像及预测效果;形成了适用于疏松砂岩的综合表层调查技术和激发因素设计方法,量化了压制高频噪声的小组合参数。最终显著拓展了地震资料有效频宽,改善了剖面成像效果。 The TJ area in the Northeast Sichuan Basin is rich in oil and gas resources,but the seismic and geological conditions are complex.The primary understand target has developed small fractures,making the fractured-porous reservoir very anisotropic.The near-surface interval is loose sandstone,so the seismic frequency band is narrow.The dense vegetation causes strong high-frequency noises.The matured"2W1H"seismic exploration technology(wide frequency and wide azimuth,high density)is used to design the recor-ding system to improve the image of the reservoir with small fractures and strong anisotropy.Finally,the comprehensive surface survey and shooting factor design technology is developed for loose sandstone,which can quantitatively analyze small array parameters for suppressing high-frequency noises.By expanding the effective bandwidth,the imaging effect of the seismic section is improved.
作者 潘家智 刘斌 何京国 卢湘鹏 张在武 PAN Jiazhi;LIU Bin;HE Jingguo;LU Xiangpeng;ZHANG Zaiwu(Shengli Branch Company,Sinopec Petroleum Engineering Geophysical Co.Ltd.,Dongying,Shandong 257100,China)
出处 《石油地球物理勘探》 EI CSCD 北大核心 2020年第S01期1-8,4,共9页 Oil Geophysical Prospecting
基金 国家科技重大专项“大型油气田及煤层气开发”子课题“海相碳酸盐岩地震勘探关键技术”(2017ZX05005004) 中石化石油工程公司先导试验项目“川东复杂山地条件下单点检波器适应性研究”(SG18-78X)联合资助
关键词 川东北山地 宽频宽方位 疏松砂岩 小组合 mountains in Northeast Sichuan Basin wide frequency and wide azimuth loose sandstone small array
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