[1]周 霞,王 威,杜红权,等.川东北地区须家河组四段物源及沉积体系特征[J].新疆石油地质,2015,36(04):443.[doi:10.7657/XJPG20150411]
 ZHOU Xia,WANG Wei,DU Hongquan,et al.Provenance Analysis and Sedimentary System Characteristics of the4th Member of Xujiahe Formation in Northeastern Sichuan Basin[J].Xinjiang Petroleum Geology,2015,36(04):443.[doi:10.7657/XJPG20150411]
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川东北地区须家河组四段物源及沉积体系特征()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
36
期数:
2015年04期
页码:
443
栏目:
出版日期:
2015-08-30

文章信息/Info

Title:
Provenance Analysis and Sedimentary System Characteristics of the4th Member of Xujiahe Formation in Northeastern Sichuan Basin
文章编号:
1001-3873(2015)04-0443-07
作者:
周 霞1 王 威1 杜红权1 王 涛2
(1.中国石化 勘探分公司 研究院,成都610041;2. 中国石油 新疆油田分公司 红山油田有限责任公司, 新疆 克拉玛依 834000)
Author(s):
ZHOU Xia1 WANG Wei1 DU Hongquan1 WANG Tao2
(1.Research Institute of Exploration Company, Sinopec, Chengdu, Sichuan610041, China;2.Hongshan Oilfield Co., Ltd, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang834000, China)
关键词:
四川盆地 川东北地区 须家河组四段 物源分析 辫状河三角洲
Keywords:
Sichuan basin northeastern Sichuan basin Xujiahe4th member provenance analysis braidedriver delta
分类号:
TE111.3
DOI:
10.7657/XJPG20150411
文献标志码:
A
摘要:
综合运用古水流法、岩矿分析法及重矿物法3类物源分析方法对川东北地区须四段沉积期的物源方向进行分析,恢复了各物源区母岩性质。通过对研究区及周缘露头须四段古水流方向、砂岩类型、岩屑类型及含量变化、重矿物组合和重矿物ZTR指数等资料的研究表明,须四段沉积期川东北地区各个区块具有不同的物源方向:元坝西部沉积物主要来自于龙门山造山带,母岩类型主要为碳酸盐岩、次为硅质岩,少量低级变质岩;通南巴地区沉积物主要来自于米仓山—北大巴山造山带,母岩类型主要为沉积岩,次为火山岩,少量的低-中高级变质岩;元坝东部沉积物可能来自大巴山东缘,母岩类型主要为沉积岩,次为低级变质岩,以富含长石为特征;元坝中部呈混合物源的特征。根据物源分析、沉积环境、野外露头、岩心观察、测井及地震资料分析,将须四段沉积期川东北地区划分为3大辫状河三角洲沉积体系,以三角洲平原辫状河道和前缘水下分流河道微相为主,河道砂体全区发育。
Abstract:
This paper analyzed the provenance directions of the4th member of Xujiahe formationinnortheastern Sichuan basin using paleocurrent, rock?mineral analysis and heavy mineral methods, and presented the parent rock types in the each provenance area. The study of the provenance directions, sandstone type, debris type and content variation, heavy mineral combination and ZTRindex indicate that the different provenance directions are as follows: in western Yuanba area the sediments are mainly from Longmenshan orogenic belt, the parent rock types are dominated by carbonate rock, followed by siliceous rock and a few low?grade metamorphic rocks; in Tongnanba area the sediments come from Micang-North Dabashan orogenic belt, the parent rock types are dominated by sedimentary rocks, followed by volcanic rock and a few low and mid?high grade metamorphic rocks; in eastern Yuanba area the sediments possibly come from eastern margin of Dabashan area, the parent rock types are mainly sedimentary rocks, secondarily low?grade etamorphic rocks, and characterized by rich feldspars; the middle part of Yuanba area is characterized by mixed provenance. According to the analyses of provenance directions, sedimentary environment, field outcrops, core observation, well logging and seismic data, the northeastern Sichuan basin of the4th member of Xujiahe formation can be divided into three braided?river delta depositional Systems where the microfacies are dominated by braided channels in delta plain and underwater distributary channels in delta front, and the channel sandbody is distributed in the whole area

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更新日期/Last Update: 2015-09-21