多次波信息偏移成像技术在火山机构精准刻画中的应用  

Application of multiple wave information migration imaging to the precising description of volcanic system

作　　者：周雪威 阎建国[1] 侯明才[1] ZHOU Xuewei;YAN Jianguo;HOU Mingcai(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059

出　　处：《成都理工大学学报（自然科学版）》2020年第2期222-226,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家科技重大专项(2016ZX05024003-010)。

摘　　要：为提高渤海M油田小尺度火成岩的成像质量,对基于单程波理论的多次波偏移方法进行研究。多次波偏移方法采用地震波场一次波与多次波的全波场信息,利用单程波理论对多次波进行互相关成像,能够提高火成岩的照明度及成像分辨率,同时提高了计算效率。由火成岩模型测试及实际数据应用证明,该方法能够改善火山通道的成像质量,提高小尺度火成岩的信噪比和分辨率,使火成岩同相轴刻画得更为清晰。利用该成像结果进行精细地震资料解释能够大幅度提高解释精度。Based on one-way wave theory,a new migration method of multiples reflections is proposed and studied in order to improve the imaging quality of the small-scale igneous rocks in Bohai M Oilfield.The migration method of multiples reflections uses the seismic wave field to carry out the cross-correlation imaging of multiples on the basis of one-way wave theory and seismic full-wave field information,including the primary and multiple waves.It proves that this method can improve the illumination and imaging resolution of the igneous rock and enhance the imaging efficiency and computing efficiency.Model testing and application to field data show that the migration of multiples reflections method can modify the imaging quality of volcanic channels,improve the signal-to-noise ratio and resolution of small-scale igneous rocks,and strength reflection events of the igneous rock.The application of imaging result to the fine seismic data analysis can greatly increase the interpretation accuracy.Therefore,this method provides a new way for oilfield exploration and development.

关 键 词：多次波偏移 单程波偏移 高速火成岩 火山通道 

分 类 号：P631.42[天文地球—地质矿产勘探]