层序地层学标准化理论在陆架坡折-陆坡区的应用——以珠江口盆地中中新世沉积层序为例

doi:10.11743/ogg20210615

石油与天然气地质 ›› 2021, Vol. 42 ›› Issue (6): 1414-1422.doi: 10.11743/ogg20210615

层序地层学标准化理论在陆架坡折-陆坡区的应用——以珠江口盆地中中新世沉积层序为例

陈维涛¹(), 徐少华^2,*(), 孙珍³, 何敏¹, 姚佳利¹, 王英民⁴, 卓海腾⁵

1. 中海石油(中国)有限公司深圳分公司, 广东深圳 518000
2. 重庆科技学院复杂油气田勘探开发重庆市重点实验室, 重庆 401331
3. 中国科学院南海海洋研究所边缘海与大洋地质重点实验室, 广东广州 510301
4. 浙江大学海洋学院, 浙江舟山 316021
5. 中山大学海洋科学学院, 广东珠海 519082

收稿日期:2020-04-20 出版日期:2021-12-28 发布日期:2021-12-16
通讯作者: 徐少华 E-mail:chenwt2@cnooc.com.cn;xsh_xu@163.com
作者简介:陈维涛(1983—), 男, 高级工程师, 石油地质勘探。E-mail: chenwt2@cnooc.com.cn
基金资助:
国家科技重大专项(2016ZX05024-004);中海石油（中国）有限公司综合科研项目(CNOOC-KJ135ZDXM37SZ02SZ)

Application of standardized sequence stratigraphy theory in the shelf break-to-slope area: A case study of the Middle Miocene sedimentary sequence in the PRMB

Weitao Chen¹(), Shaohua Xu^2,*(), Zhen Sun³, Min He¹, Jiali Yao¹, Yingmin Wang⁴, Haiteng Zhuo⁵

1. Shenzhen Branch of CNOOC Ltd., Shenzhen, Guangdong 518000, China
2. Chongqing Key Laboratory of Complex Oil and Gas Field Exploration and Development, Chongqing University of Science & Technology, Chongqing 401331, China
3. Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, Guangdong 510301, China
4. Ocean College, Zhejiang University, Zhoushan, Zhejiang 316021, China
5. School of Marine Sciences, Sun Yat-sen University, Zhuhai, Guangdong 519082, China

Received:2020-04-20 Online:2021-12-28 Published:2021-12-16
Contact: Shaohua Xu E-mail:chenwt2@cnooc.com.cn;xsh_xu@163.com

摘要/Abstract

摘要：

层序地层学标准化理论在陆架坡折-陆坡深水区的应用尚未成熟。截至目前，基于浅层高分辨率地震和露头资料对深水层序开展的研究大多聚焦于深水水道或盆底扇内部，而忽视了与上陆坡以及陆架体系的系统对比。将层序地层学标准化理论应用于珠江口盆地中中新世（13.8 Ma前后）的陆架坡折到陆坡区，通过三维地震资料的系统解释、属性提取、可视化和钻测井信息分析，建立了从陆架到陆坡区的统一层序地层格架。在此基础上，明确了珠江口盆地陆架坡折-陆坡深水区中中新世沉积层序具有海侵体系域和高位体系域厚度薄、强制海退体系域和低位体系域前积层厚度大，以及底积层（主要为深水扇）普遍发育于低位体系域的层序地层发育特征。深水区层序地层格架的建立应从陆架坡折区到深水区整体考虑，结合“源-汇”体系演化特征进行三维空间的系统对比，才能准确划分各个体系域，从而更好地认识陆架-陆坡-深水区的沉积耦合关系。

关键词: 陆架坡折-陆坡, 深水扇, 标准化, 层序地层, 中中新世, 珠江口盆地

Abstract:

The application of standardized sequence stratigraphy theory is yet to be improved in the shelf break-to-slope area in deep water. As of now, the researches on the sequence stratigraphic framework mostly focus on deep-water channels or interior basin floor fans (BFFs) based on the high-resolution seismic data of shallow layers and outcrop observation, while ignoring systematic correlation with the upper slope and shelf system. In this regard, the study sets up a uniform sequence stratigraphic framework running from continental shelf to slope on the basis of systematic interpretation, attribute extraction and visualization of 3D seismic data, as well as analysis of drilling and logging data, while applying the standardized sequence stratigraphy theory to the Middle Miocene (around 13.8 Ma) shelf break-to-slope area in deep water in the Pearl River Mouth Basin (PRMB). As shown by the newly established framework, deposit sedimentary sequences in both transgressive systems tract (TST) and highstand systems tract (HST) are extremely thin as a whole; foreset beds of the falling stage systems tract (FSST) and lowstand systems tract (LST), however, are much thicker, and bottomset beds (mainly of deep-water fan) are widely developed in the LST. In a nutshell, the establishment of deep-water sequence stratigraphic framework is supposed to have a holistic consideration from shelf break to deep-water areas at first; 3D systematic comparison of seismic events is to be followed while analyzing the evolutionary features of "Source-to-Sink" system, with a view to better dissecting the system tracts and understanding the coupling relationship of shelf, slope and deep-water sedimentary facies.

Key words: shelf break-to-slope area, deep-water fan, standardization, sequence stratigraphy, Middle Miocene, Pearl River Mouth Basin (PRMB)

中图分类号:

TE121.3

陈维涛,徐少华,孙珍,等. 层序地层学标准化理论在陆架坡折-陆坡区的应用——以珠江口盆地中中新世沉积层序为例[J]. 石油与天然气地质, 2021, 42(6): 1414-1422. doi: 10.11743/ogg20210615 Weitao Chen,Shaohua Xu,Zhen Sun,et al. Application of standardized sequence stratigraphy theory in the shelf break-to-slope area: A case study of the Middle Miocene sedimentary sequence in the PRMB[J]. Oil & Gas Geology, 2021, 42(6): 1414-1422. doi: 10.11743/ogg20210615

图/表 7

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层序地层学标准化理论在陆架坡折-陆坡区的应用——以珠江口盆地中中新世沉积层序为例

Application of standardized sequence stratigraphy theory in the shelf break-to-slope area: A case study of the Middle Miocene sedimentary sequence in the PRMB

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