西南石油大学学报(自然科学版)

• 地质勘探 •    下一篇

文昌19-1 油田珠江组二段I 油组沉积相研究

雷霄1,胡余2,梁文锋1,廖纪佳2 *,廖明光2   

  1. 1. 中海石油(中国)有限公司湛江分公司,广东湛江524057;2. 西南石油大学地球科学与技术学院,四川成都610500
  • 出版日期:2015-08-01 发布日期:2015-08-01
  • 通讯作者: 廖纪佳,E-mail:liaojijia198433@163.com
  • 基金资助:

    国家重点基础研究发展计划(2014CB239005)。

A Study on Sedimentary Facies of Oil Group I in Member 2 of Zhujiang Formation in Wenchang 19-1 Oilfield

Lei Xiao1, Hu Yu2, Liang Wenfeng1, Liao Jijia2*, Liao Mingguang2   

  1. 1. Zhanjiang Branch,China National Offshore Oil Corporation(China),Zhanjiang,Guangdong 524057,China
    2. School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2015-08-01 Published:2015-08-01

摘要:

通过岩石学、测井相特征分析,结合区域构造沉积背景,对珠江口盆地西部文昌19 1 油田珠江组二段I 油
组沉积相进行了研究,认为该地层主要为滨岸相沉积,共识别出前滨、临滨两种亚相,前滨滩坝、临滨滩砂、临滨泥和
海泛泥4 种微相。前滨滩坝发育于潮间带,岩性主要为肉红色陆源碎屑质生屑灰岩、灰白色钙质砂岩,块状构造,层理
不明显,垂向上为下细上粗的反韵律,自然伽马呈低幅枣核状、锯齿形或箱形;临滨滩砂和临滨泥发育于潮下带,岩性
主要为细砂岩、泥质粉砂岩,夹少量泥质条带,波纹层理,常见生物扰动构造,在自然伽马曲线上,滩砂呈中幅漏斗型,
临滨泥呈高幅钟形;海泛泥发育于水体加深、水动力减弱的区域,为一套广泛分布的细粒沉积物,岩性主要为泥岩、粉
砂质泥岩,透镜状层理,常见生物扰动构造,自然伽马呈高幅锯齿形、钟形。

关键词: 珠江组二段I 油组, 海相地层, 碎屑岩, 沉积相, 沉积模式

Abstract:

The aim of this paper is to study the characteristics of sedimentary facies of oil group I in Member 2 of Zhujiang
Formation in Wenchang 19 1 Oilfield,west Pearl River Mouth Basin,according to the analysis of lithology and logging
facies as well as regional structural and sedimentary background. The research shows that this stratum is littoral facies. And the
littoral facies can be divided into foreshore and shoreface,which include foreshore beach bar microfacies,shoreface beach sand
microfacies,shoreface beach mud microfacies,and flooding mud microfacies. Foreshore beach bar microfacies developed in
the intertidal zone,the lithology of which is mainly flesh pink terrigenous clastic mass bioclast limestone and gray calcareous
sandstone,with massive structure,unobvious beddings,and reverses rhythm vertically. The low range gamma ray takes the
forms of date pit,zigzag or box curves. Shoreface beach sand microfacies and shoreface beach mud microfacies developed in
the subtidal zone. The lithology is mainly fine sand and politicsilt stone,and occasional pelitic strip. with ripple bedding,poor
cementation,good sorting,and bioturbation structure. The middle range gamma ray form of shoreface beach sand microfacies
are funnel curves. The high range gamma rays of shoreface beach mud microfacies are bell curves. Flooding mud microfacies
developed in the area where the water deepened,and the hydrodynamic force weakens. And it is a set of widely scattered
fine-grained sediments,the lithology of which is mainly mudstone and silty mudstone. With lentoid bedding,and bioturbation
structure. The high range gamma rays are zigzag or bell curves.

Key words: oil group I in Member 2 of Zhujiang Formation, marine strata, clastic rocks, sedimentary facies, depositional
model