中古生界火成岩复杂构造波场特征分析与对策  

Characteristics Analysis and Countermeasures on Complex Wavefield of Mesozoic-Paleozoic Igneous Rocks

作　　者：张鹏[1] 焦叙明[1] 吴旭光[1] 刘兴达 张明强[1] 陈磅 刘旭明 Zhang Peng;Jiao Xuming;Wu Xuguang;Liu Xingda;Zhang Mingqiang;Chen Pang;Liu Xuming(Geophysical-China Oilfield Services Limited,Tianjin 300451,China)

机构地区：[1]中海油田服务股份有限公司,天津300451

出　　处：《工程地球物理学报》2021年第6期816-821,共6页Chinese Journal of Engineering Geophysics

基　　金：国家自然基金青年科学基金(编号:41704134)。

摘　　要：南黄海盆地是我国海相油气勘探重要区域,中部隆起发育巨厚中生界、古生界海相碳酸盐岩地层,油气勘探前景良好,地质条件复杂,新生界与中古生界地层速度差异大,发育了强烈多次波和绕射波等,严重影响地震资料品质,地震波能量难以穿透到中深层,导致残留盆地构造落实困难,长期制约南黄海勘探进程。本文结合南黄海中部隆起地质情况,开展地震地质条件机理研究,分析影响地震波场特征主要关键因素。在此基础上提出了富低频、高密度、宽方位、广角地震采集以及处理技术对策,提高下伏地层能量,提高地震资料品质,指导了南黄海下一步勘探。The South Yellow Sea Basin is an important area for marine hydrocarbon exploration in China.The central uplift which develops thick Mesozoic-Paleozoic marine carbonate strata has good prospects for oil and gas exploration.Due to its great difference in velocity between Cenozoic and Mesozoic-Paleozoic strata,the strong multiples and diffraction waves are developed and seriously affect the quality of seismic data.The energy of seismic wave is difficult to penetrate into the mid-depth strata,resulting in difficulties in the implementation of residual basin structures and restricting the exploration process of the South Yellow Sea for a long time.Based on the geological conditions of the middle uplift of the South Yellow Sea,this paper studies the mechanism of seismic geological conditions and analyzes the main key factors affecting the seismic wave field characteristics.On this basis,the technical counter measures of rich low frequency,high density,wide azimuth,wide-angle seismic acquisition and processing technology are proposed to improve the energy of underlying strata,improve the quality of seismic data,and guide the next exploration of the South Yellow Sea.

关 键 词：南黄海中古生界 高速屏蔽层 多次波 富低频 

分 类 号：P631.4[天文地球—地质矿产勘探]