地堑型盆地陆棚三角洲全息地层学  

Holographic Stratigraphy of the Continental-shelf Deltas in Graben Basins

作　　者：邹志友 罗顺社[1,3] 张生 陶中一 方攀 丁翠娇 ZOU Zhi-you;LUO Shun-she;ZHANG Sheng;TAO Zhong-yi;FANG Pan;DING Cui-jiao(School of Geosciences,Yangtze University,Jingzhou 430100,China;Guilin University of Technology at Nanning,Guilin 541000,China;Cooperative Innovation Center of Unconventional Oil and Gas,Yangtze University,Jingzhou 430100,China;Remote Sensing Center of Guangxi,Guilin 541000,China;Shengli Geological Logging Company,Sinopec Matrix Co.,Ltd.,Dongying 257064,China;Geophysical Research Institute,Shengli Oilfield Branch Co.,Sinopec,Dongying 257062,China)

机构地区：[1]长江大学地球科学学院,荆州430100 [2]桂林理工大学南宁分校,桂林541000 [3]长江大学非常规油气省部共建协同创新中心,荆州430100 [4]广西壮族自治区遥感中心,桂林541000 [5]中石化经纬有限公司胜利地质录井公司,东营257064 [6]中石化胜利油田分公司物探研究院,东营257062

出　　处：《科学技术与工程》2024年第1期125-133,共9页Science Technology and Engineering

基　　金：国家自然科学基金(41562018)。

摘　　要：地堑型盆地陆棚三角洲全息地层学研究需要进一步深入,以国外典型陆棚三角洲为例,基于经典层序地层学理论,结合地震反射终止关系识别和划分三级层序和体系域,建立层序地层格架;基于旋回地层学理论,利用小波变换、频谱分析和反傅里叶变换滤波等方法识别钻井自然伽马曲线蕴含的米兰科维奇旋回,结合地质年代基准点,建立绝对天文年代标尺;综合年代地层、岩石地层、磁性地层、层序地层、旋回地层和地震地层共同建立全息地层格架,提出地堑型盆地陆棚三角洲层序界面定年方法和建议。结果表明:新近系可以划分为5个三级层序和15个体系域。以23.03 Ma为基准点,CS1、CS2和CS3层序的顶界面绝对地质年龄分别为13.93、9.13和2.13 Ma,其最大海泛面对应的绝对地质年龄分别为20.03、12.13和6.13 Ma。针对地堑型盆地热坳陷期陆棚三角洲向海进积并横向生长的特点,全息地层学研究建议结合磁性地层定年和全球海平面曲线,在层序格架的约束下利用钻井的旋回地层计算削截顶面的地质年龄,如果与磁性地层年龄基本相符,则与钻井削截顶面最近的斜交层序界面便代表着真实的等时界面。Holostratigraphic research of continental-shelf deltas in graben basins needs to be further studied.Taking a typical foreign continental-shelf delta as an example,based on the classic sequence stratigraphic theory,combined with the seismic reflection termination relationship,the third-order sequence and system tract were identified and divided,and the sequence stratigraphic framework was established.Based on cyclostratigraphy,the Milankovitch cycles within the gamma-ray curve of the drilling were identified by wavelet transformation,spectral analysis and inverse Fourier transformation filtering,and the absolute astronomical time scale was established by combining the geological-time reference point.The holographic stratigraphic framework was established by integrating chronostratigraphy,lithostratigraphy,magnetic stratigraphy,sequence stratigraphy,cyclostratigraphy and seismic stratigraphy,and the methodology and suggestion for dating the sequence boundary of continental-shelf deltas in graben basins were proposed.The results show that Neogene strata can be divided into 5 third-order sequences and 15 individual system tracts.Taking 23.03 Ma as the reference point,the absolute geological ages of the top boundary of CS1,CS2 and CS3 sequences are 13.93,9.13 and 2.13 Ma,respectively,and the absolute geological ages of their corresponding maximum flooding surface are 20.03,12.13 and 6.13 Ma,respectively.Aiming at the characteristics of progradation and lateral growth of continental-shelf deltas during the thermal depression period of graben basins,holographic stratigraphic research suggests that the geological age of the truncated top surface can be calculated by using the cyclostratigraphy of the drilling under the constraint of sequence framework in combination with magnetic stratigraphic dating and global sea level curve.If the outcome is basically consistent with the age of magnetic stratigraphy,the oblique sequence interface closest to the truncated top surface of the drilling may represent the true isochronous s

关 键 词：大西洋 中新世 陆架 层序地层学 旋回地层学 

分 类 号：P534[天文地球—古生物学与地层学]