珠江口盆地开平凹陷恩平组地震反射特征与沉积体系展布

王升兰; 刘晖

doi:10.3981/j.issn.1000-7857.2014.h2.008

科技导报 >

2014 , Vol. 32 >Issue 28/29: 64 - 69

DOI: https://doi.org/10.3981/j.issn.1000-7857.2014.h2.008

研究论文

珠江口盆地开平凹陷恩平组地震反射特征与沉积体系展布

王升兰 ,
刘晖

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1. 中海油研究总院, 北京 100027;
2. 中国地质调查局油气资源调查中心, 北京 100029

王升兰, 工程师, 研究方向为油气地质, 电子信箱: wangshl8@cnooc.com.cn

收稿日期: 2014-05-02

修回日期: 2014-08-06

网络出版日期: 2014-10-24

基金资助

国家科技重大专项(2011ZX05023,2011ZX05025)

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Seismic Reflection and Depositional System of the Enping Formation in the Kaiping Depression of the Zhujiangkou Basin

WANG Shenglan ,
LIU Hui

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1. CNOOC Research Institute, Beijing 100027, China;
2. Oil & Gas Survey, China Geological Survey, Beijing 100029, China

Received date: 2014-05-02

Revised date: 2014-08-06

Online published: 2014-10-24

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摘要

开平凹陷位于珠江口盆地西南部,在古近纪为一NE-ENE 向展布的断陷盆地。在地震反射特征识别恩平组沉积界面的基础上,依据地震反射结构和井-震标定在恩平组识别出5 种沉积相类型。浅湖亚相表现为中频率、强振幅、连续平行席状地震相,分布于凹陷中心;滨湖亚相表现为中高频、中连续、亚平行席状地震相和中频率、中弱振幅、中连续上超地震相和中高频、弱振幅、中连续微波状地震相,主要分布于凹陷南部;三角洲相表现为高频率、变振幅、中连续前积地震相和中高频、中弱振幅、中等连续、弱前积地震相,主要发育于凹陷东部和东北部;扇三角洲相表现为低频、弱振幅、断续杂乱楔形地震相,主要分布于凹陷西部控凹断层下降盘;冲积扇相表现为低频、弱振幅、断续杂乱充填地震相,局限于西部控凹断层的上升盘。

关键词： 沉积环境; 沉积相; 地震相; 恩平组; 开平凹陷

本文引用格式

王升兰 , 刘晖 . 珠江口盆地开平凹陷恩平组地震反射特征与沉积体系展布[J]. 科技导报, 2014 , 32(28/29) : 64 -69 . DOI: 10.3981/j.issn.1000-7857.2014.h2.008

Abstract

The Kaiping Depression is located on the western Zhujiangkou Basin. It is a Paleogene faulted basin in the NE-ENE direction. Based on results obtained from drills and seismic reflections, five sedimentary facies are identified in the Enping Formation. The shallow lake facies is seismic facies characterized by medium frequency, strong amplitude, continuity and parallel sheet, distributed in the center depression. Littoral lake facies includes seismic facies characterized by medium-high frequency, medium amplitude, continuity, and sub-parallel sheet, on-lap seismic facies characterized by medium frequency, medium-week amplitude and medium continuity, and micro-waved seismic facies characterized by medium-high frequency, week amplitude and medium continuity, deposited on the southwestern depression. Delta facies includes progradation seismic facies characterized by high frequency, varying amplitude and medium continuity and weak-progradation seismic facies characterized by medium-high frequency, medium-week amplitude and medium continuity, mainly developed on the east and northeast. Fan delta facies is tangle-some wedge seismic facies,,characterized by low frequency, week amplitude, and low continuity, distributed on the down-thrown sides of west depression-controlling faults. Alluvial fan facies is tangle-some filling seismic facies, characterized by low frequency, week amplitude, low continuity, limited on the up-thrown side of a west depression-controlling fault.

Key words： sedimentary environment; facies; seismic facies; Enping Formation; Kaiping Depression

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