北部湾盆地乌石凹陷东区古近系流沙港组二段砂泥薄互层沉积相特征及演化<sup>&#x0002A;</sup>

doi:10.7605/gdlxb.2017.06.079

古地理学报 ›› 2017, Vol. 19 ›› Issue (6): 1023-1036. doi: 10.7605/gdlxb.2017.06.079

• 岩相古地理学及沉积学 • 上一篇下一篇

北部湾盆地乌石凹陷东区古近系流沙港组二段砂泥薄互层沉积相特征及演化^*

孙乐^{1, 2}, 于兴河^{1, 2}, 李胜利^{1, 2}, 张辉³, 何玉林⁴, 杨楷乐³, 乔亚蓉^{1, 2}, 张文淼^{1, 2}, 吴子瑾^{1, 2}, 高明轩^{1, 2}

1 中国地质大学(北京)能源学院,北京 100083;
2 海相储层演化与油气富集机理教育部重点实验室,北京 100083;
3 中海石油(中国)有限公司湛江分公司,广东湛江 524057;
4 国土资源部广州海洋地质调查局,广东广州 510760

收稿日期:2017-01-09 出版日期:2017-12-01 发布日期:2017-12-04
通讯作者: 于兴河,男,1958年生,教授,博士生导师,主要从事储层沉积学、海洋油气资源和含油气盆地分析。E-mail: billyu@cugb.edu.cn。
作者简介:孙乐,男,1988年生,中国地质大学(北京)博士研究生,研究方向为油气储层地质、油气田开发地质。E-mail: geology_sunle@163.com。
基金资助:
*国家科技重大专项(2016ZX05024-002-002)资助

Sedimentary characteristics and evolution of thin interbeds of the Member 2 of Paleogene Liushagang Formation in eastern Wushi sag,Beibu Wan Basin

Sun Le^{1, 2}, Yu Xinghe^{1, 2}, Li Shengli^{1, 2}, Zhang Hui³, He Yulin⁴, Yang Kaile³, Qiao Yarong^{1, 2}, Zhang Wenmiao^{1, 2}, Wu Zijin^{1, 2}, Gao Mingxuan^{1, 2}

1 School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083;
2 Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism,Ministry of Education,Beijing 100083;
3 Zhanjiang Branch,CNOOC Ltd.,Zhanjiang 524057,Guangdong;
4 Guangzhou Marine Geological Survey,Ministry of Land & Resources,Guangzhou 510760,Guangdong

Received:2017-01-09 Online:2017-12-01 Published:2017-12-04
Contact: 　Yu Xinghe,born in 1958,is a professor and doctoral supervisor. He is mainly engaged in researches of petroleum reservoir sedimentology,marine resources and petroleum-bearing basin analysis. E-mail: billyu@cugb.edu.cn.
About author:Sun Le,born in 1988,is a Ph.D. candidate of China University of Geoscience(Beijing). His research field is petroleum reservoir sedimentology,oil and gas reservoir development. E-mail: geology_sunle@163.com.
Supported by:
Financially supported by the National Science and Technology Major Project of China (No.2016ZX05024-002-002)

摘要/Abstract

摘要： 北部湾盆地乌石凹陷东区古近系流沙港组二段构造复杂,沉积差异大,横向变化快,对物源和沉积相的认识存在争议。为了查明研究区沉积相分布与演化规律,文中以岩心、测井、地震和分析化验资料为基础,结合区域构造背景,对研究区流沙港组二段沉积物源、沉积相特征及演化规律展开研究。分析认为,流沙港组二段物源来自于北部高地势地区,发育三角洲前缘—深水湖泊沉积序列,主要发育相对远物源的正常三角洲前缘沉积,砂体单层厚度小、多层交互式分布。井震结合由下到上将流沙港组二段划分为4个四级层序,其中MSC2和MSC3层序为短期快速水退到较长期水进过程,物源供给较为充足,砂体发育程度高,是主力砂体展布层段;流沙港组二段储集层物性主要受埋深及沉积相带约束,B油田物性好于A油田,三角洲前缘近源端发育的水下分流河道、河口坝为有利储集层分布区。

关键词: 北部湾盆地, 乌石凹陷东区, 流沙港组, 沉积物源, 沉积相, 沉积演化

Abstract: The structure and sedimentary characteristics of the Member 2 of Liushagang Formation in the eastern Wushi sag,Beibu Wan Basin are very complex. The sedimentation is of great variation with sharp lateral changes. The understanding of sediment provenance and sedimentary facies is controversial. Using core,logging,seismic,and laboratory data,the present study attempts to: (1)investigate sediment provenance,sedimentary facies and evolution of the Member 2 of the Liushagang Formation in the study area;(2)determine the distribution and evolution of sedimentary facies in the study area;(3)predict favorable reservoir distribution characteristics;and(4)to better serve the oil and gas exploration and development. Results from this study suggest that the northern high-lying area represents the sediment provenance of the Member 2 of the Liushagang Formation,which is characterized by the delta front-deep lake sedimentary sequence. The normal deltaic sediments were well developed,and the thickness of individual sand bodies is small,which manifests as multilayer interactive distribution. The Member 2 of the Liushagang Formation is divided into four 4th￣order sequences from bottom to top. MSC2 and MSC3 sequences formed during the short-term rapid water regression were involved into the process of longer-term water transgression. The sediment supply was sufficient,sand bodies were,thus,well developed. Observations from this work suggest that the buried depth and sedimentary facies play a pivotal role in the modulation of the reservoir properties of the Member 2 of the Liushagang Formation. Reservoir properties of B oil field are better than those of A oil filed. The subaqueous distributary channel and estuary dam developed near the source of the delta front are favorable reservoir distribution areas.

Key words: Beibu Wan Basin, eastern Wushi sag, Liushagang Formation, sediment provenance, sedimentary facies, sedimentary evolution

中图分类号:

P512.2

孙乐, 于兴河, 李胜利, 张辉, 何玉林, 杨楷乐, 乔亚蓉, 张文淼, 吴子瑾, 高明轩. 北部湾盆地乌石凹陷东区古近系流沙港组二段砂泥薄互层沉积相特征及演化^*[J]. 古地理学报, 2017, 19(6): 1023-1036.

Sun Le, Yu Xinghe, Li Shengli, Zhang Hui, He Yulin, Yang Kaile, Qiao Yarong, Zhang Wenmiao, Wu Zijin, Gao Mingxuan. Sedimentary characteristics and evolution of thin interbeds of the Member 2 of Paleogene Liushagang Formation in eastern Wushi sag,Beibu Wan Basin[J]. JOPC, 2017, 19(6): 1023-1036.

http://www.gdlxb.cn/CN/Y2017/V19/I6/1023

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北部湾盆地乌石凹陷东区古近系流沙港组二段砂泥薄互层沉积相特征及演化^*

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北部湾盆地乌石凹陷东区古近系流沙港组二段砂泥薄互层沉积相特征及演化*

Sedimentary characteristics and evolution of thin interbeds of the Member 2 of Paleogene Liushagang Formation in eastern Wushi sag,Beibu Wan Basin

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北部湾盆地乌石凹陷东区古近系流沙港组二段砂泥薄互层沉积相特征及演化^*