摘要
由于梨树断陷基底结构复杂,且地震深层资料品质常受影响,通过重磁震联合研究基底岩性分布对进一步评价该地区勘探潜力具有重要意义。在收集前人资料基础上,笔者等重新测定了部分样品的岩石物性。通过对研究区重磁资料进行重震结合剥皮及延拓等去浅部效应,利用小波分析和趋势分析等去深部影响,得到了基底剩余异常,并结合地震、钻井等资料联合解译了剩余异常,从而深化了对梨树断陷基底岩性的认识,预测了基底不同岩性的分布特征。梨树断陷基底岩性可分为如下几类:花岗岩、变余砂砾岩、板岩、千枚岩等浅变质岩,石英岩、石英片岩等中变质岩,片麻岩等深变质岩,灰岩以及火山岩。本次研究分类更加详细,与钻孔资料吻合较好。
Because the basement structure of the Lishu fault depression is complex and the quality of deep seismic data is often affected,it is of great significance to study the basement lithology distribution using the combination of gravity,magnetic,and seismic data to further evaluate the exploration potential of this area.Based on previous data collected,the author and others re-determined the petrophysical properties of some samples.Based on the gravity and magnetic data in the study area,basement anomalies were revealed through the removal of shallow seismic effects combined with methods of stripping and extension,and through the removal of deep effects by wavelet analysis and trend analysis.The remaining anomalies were interpreted by combining seismic and drilling data,thus deepening our understanding of basement lithology and predicting the distribution characteristics of different basement lithologies.The basement lithology of the Lishu fault depression can be divided into the following categories:granite,metamorphic conglomerate,slate,phyllite,and other shallow metamorphic rocks;quartzite,quartz schist,and other middle metamorphic rocks;gneiss and other deep metamorphic rocks;limestone;and volcanic rocks.The classification in this study is more detailed and is in good agreement with the borehole data.
作者
周卓明
陈军
杨昊
陆建林
ZHOU Zhuoming;CHEN Jun;YANG Hao;LU Jianlin(Wuxi Research Institute of Petroleum Geology,SINOPEC,Jiangsu Wuxi 214126,China;School of Ocean and Earth Science,Tongji University,Shanghai200092,China)
出处
《上海国土资源》
2023年第1期120-125,共6页
Shanghai Land & Resources
基金
中国石化科技部项目“梨树断陷基岩油气藏勘探潜力及区带评价”(P14041)。
关键词
梨树断陷
基底岩性
剥皮法
联合反演
Lishu fault depression
basement lithology
layer-striping method
joint inversion
作者简介
周卓明,1970年生,男,博士,高级工程师,主要从事石油地质研究。电子邮箱:zhouzm.syky@sinopec.com。
