川西前陆盆地侏罗纪层序地层格架、沉积体系配置及演化
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摘要
通过地表露头和钻井岩心的观察,以及测井曲线和地震剖面的综合分析,对分割川西前陆盆地侏罗系陆相碎屑岩充填实体的层序界面进行了识别和追踪,将该区层序界面划分为两种类型:不整合面及侵蚀沉积间断面和最大湖泛面,据此在全盆侏罗系地层中识别出13个层序界面,将川西前陆盆地侏罗系划分为13个三级层序。据盆地沉积特征,自西向东选择一些有代表性的层序剖面,进行盆地内不同相带间的层序对比,建立了研究区侏罗纪等时层序地层格架。并在川西前陆盆地侏罗系中识别出4种沉积体系:冲(洪)积、湖泊、扇三角洲、三角洲沉积体系。并在层序格架中讨论了各沉积体系的横向展布,大体是从盆地西缘到东缘为冲积扇—冲积平原、三角洲平原—三角洲前缘—湖底扇—滨浅湖—半深湖—三角洲—曲流河的展布方式。其中冲积扇和冲积平原分布范围相对较小,而三角洲—滨浅湖分布范围广阔,且三角洲与浅湖相在垂向上频繁交替。
Based on observing surface outcrops and drilling cores,comprehensive analysis well logs and seismic profiles,sequence interface was identified and tracked which break up Jurassic continental facies clastic rock filling entities in the western Sichuan foreland basin,and sequence interface was divided into two types in this area: unconformity and erosion sediment discontinuity and max flood surface(MFS),13 sequence boundaries identified in the whole basin of Jurassic strata,as well as the western Sichuan foreland basin Jurassic is divided into 13 sedimentary sequences.According to sedimentary characteristics of basin,from west to east,selecting of some representative sequence profiles,in order to sequence correlation between different facies tract in this basin,and set up Jurassic sequence stratigraphic framework.And then four kinds of depositional systems were identified in the western Sichuan foreland basin Jurassic: alluvion(diluvial),lakes,fan delta,delta depositional system,and so on.And it is discussed that the horizontal distribution of depositional system under sequence stratigraphic framework.Generally,from the west margin to the east margin of the basin,the distribution ways are the alluvial fan-the alluvial plain,delta plain-delta front-sublacustrine fan-shore and shallow lake semi deep lake-delta-meandering river.The range of the alluvial fan and alluvial plain is relatively small,and the distribution of delta-shore and shallow lake is wide-ranging,and the delta and shallow lake frequent at the turn in vertical.
Based on observing surface outcrops and drilling cores,comprehensive analysis well logs and seismic profiles,sequence interface was identified and tracked which break up Jurassic continental facies clastic rock filling entities in the western Sichuan foreland basin,and sequence interface was divided into two types in this area: unconformity and erosion sediment discontinuity and max flood surface(MFS),13 sequence boundaries identified in the whole basin of Jurassic strata,as well as the western Sichuan foreland basin Jurassic is divided into 13 sedimentary sequences.According to sedimentary characteristics of basin,from west to east,selecting of some representative sequence profiles,in order to sequence correlation between different facies tract in this basin,and set up Jurassic sequence stratigraphic framework.And then four kinds of depositional systems were identified in the western Sichuan foreland basin Jurassic: alluvion(diluvial),lakes,fan delta,delta depositional system,and so on.And it is discussed that the horizontal distribution of depositional system under sequence stratigraphic framework.Generally,from the west margin to the east margin of the basin,the distribution ways are the alluvial fan-the alluvial plain,delta plain-delta front-sublacustrine fan-shore and shallow lake semi deep lake-delta-meandering river.The range of the alluvial fan and alluvial plain is relatively small,and the distribution of delta-shore and shallow lake is wide-ranging,and the delta and shallow lake frequent at the turn in vertical.
引文
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13胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系层序地层[J].西南石油学院学报,2006,28(2):16-19[Hu Xiaoqiang,ChenHongde,Ji Xiangtian,et al.Jurassic sequence stratrgraphy in thewest Sichuan foreland basin,China[J].Journal of Southwest Petrole-um Institute,2006,28(2):16-19]
14钱奕中,陈洪德,刘文均.层序地层学理论和研究方法[M].成都:四川科学技术出版社,1994:96-107[Qian Yizhong,Chen Hongde,Liu Wenjun.Sequence Stratigraphy Study Theories and ResearchMethods[M].Chengdu:Press of Sichuan Science and Technology,1994:96-107]
15丘东洲,付清平.川西坳陷南区侏罗系层序地层与油气[J].天然气工业,2000,20(4):5-10[Qiu Dongzhou,Fu Qingping.Sequencestratigraphy and hydrocarbon potential of Jurassic in the south part ofwest Sichuan depression[J].Natural Gas Industry,2000,20(4):5-10]
16郑荣才.四川盆地下侏罗统大安寨段高分辨率层序地层学[J].沉积学报,1998,16(2):42-49[Zheng Rongcai.High resolution se-quence stratigraphy of Daanzhai formation,lower Jurassic in Sichuanbasin[J].Acta Sedimentologica Sinica,1998,16(2):42-49]
17魏力民,柳梅青.川西新场蓬莱镇组层序地层研究与储层横向预测[J].石油与天然气地质,2000,21(3):220-225[Wei Limin,LiuMeiqing.Study on sequence stratigraphy of Penglaizhen formation inXinchang,west Sichuan and reservoir lateral prediction[J].Oil&Gas Geology,2000,21(3):220-225]
18 Galloway WE.Genetic stratigraphic sequence in basin analysis1:ar-chitecture and genesis of flooding-surface bounded depositional units[J].AAPG Bulletin,1989,73:125-142
19王亮国,余福林,邓康龄,等.川西坳陷侏罗系沉积环境[J].油气地质与采收率,2001,8(1):13-16[Wang Liangguo,Yu Fuling,Deng Kangling,et al.The sedimentary environment of Jurassic de-pression in west Sichuan[J].Petroleum Geology and Recovery Effi-ciency,2000,2001,8(1):13-16]
20王亮国,曹烈,邓康龄,等.川西坳陷侏罗系沉积相与生烃关系研究[J].沉积与特提斯地质,2001,21(1):38-43[Wang Liangguo,Cao Lie,Deng Kangling,et al.Jurassic sedimentary facies and hydro-carbon generation in west Sichuan depression[J].Sedimentary Geolo-gy and Tethyan Geology,2000,2001,21(1):38-43]
21朱志军,陈洪德,林良彪,等.川西前陆盆地蓬莱镇期层序岩相古地理特征及演化[J].地层学杂志,2009,33(3):113-120[Zhu Zhi-jun,Chen Hongde,Lin Liangbiao,et al.Sequence-based lithofaciesand paleogeographic characteristics and evolution of Penglaizhen For-mation in Western Sichuan Foreland Basin[J].Journal of Stratigra-phy,2009,33(3):113-120
22刘鸿允.中国古地理图集[M].北京:地质出版社,1955[LiuHongyun.Atlas of the Palaeogeography of China[M].Beijing:Geo-logical Publishing House,1955]
23王鸿祯,等.中国古地理图集[M].北京:科学出版社,1985[WangHongzhen,et al.Atlas of the Palaeogeography of China[M].Bei-jing:Science Press,1985]
2叶茂才,易智强,李剑波.川西坳陷蓬莱镇组沉积体系时空配置规律[J].成都理工大学学报,2000,20(1):54-58[Ye Maocai,YiZhiqiang,Li Jianbo.Distribution rule of sedimentary system of the up-per Jurassic Penglazhen formation in west Sichuan sag[J].Journal ofChengdu University of Technology,2000,20(1):54-58]
3尹世明.川西坳陷蓬莱镇组构造—充填层序特征[J].矿物岩石,1999,19(4):40-46[Yin Shiming.The characteristics of tectontic-fill-ing sequences of Penlazhen in west Sichuan depression[J].Journal ofMineralogy and Petrology,1999,19(4):40-46]
4张闻林,张哨楠,陈洪德,等.川西北部地区侏罗系层序地层特征[J].天然气工业,2005,增刊A[Zhang Wenlin,Zhang Shaonan,Chen Hongde,et al.Sequence stratigraphical characteristics of Jurassicin the north part of west Sichuan[J].Natural Gas Industry,2005,(sup-pl.A)]
5赵永刚,陈景山,雷卞军,等.川西邛崃县白马庙气田上侏罗统蓬莱镇组高分辨率层序地层分析[J].中国地质,2005,32(4)674-681[Zhao Yonggang,Chen Jingshan,Lei Bianjun,et al.Analysis of high-resolution sequence stratigraphy of the Upper Jurassic Penglaizhen For-mation in the Baimamiao gas field,Qionglai County,Western Sichuan[J].Chinese Geology,2005,32(4)674-681]
6胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系三角洲沉积体系与沉积模式[J].石油实验地质,2005,27(3):226-231[Hu Xiao-qiang,Chen Hongde,Ji Xiangtian,et al.The Jurassic delta depositsystem tract and sedimentation model in the west Sichuan foreland basin[J].Petroleum Geology&Expeximent,2005,27(3):226-231]
7徐强,朱同兴,牟传龙.川西晚三叠世—晚侏罗世层序岩相古地理编图[J].西南石油学院学报,2001,23(10):1-4[Xu Qiang,ZhuTongxing,Mu Chuanlong.Sequence-paleogeographic mapping of UpperTriassic Xujiahe formation and Upper Jurassic Penglazhen formation inwest Sichuan[J].Journal of Southwest Petroleum Institute,2001,23(10):1-4]
8童崇光.四川盆地构造演化与油气聚集[M].北京:地质出版社,1992:19-28[Tong Chongguang.Structural Evolution and HydrocarbonAccumulation in Sichuan Basin[M].Beijing:Geological PublishingHouse,1992:19-28]
9郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社,1996:72-88[Guo Zhengwu,Deng Kangling,Kang Yonghui,et al.Formation and Evolution of Sichuan Basin[M].Beijing:Geolog-ical Publishing House,1996:72-88]
10刘树根.龙门山冲断带与川西前陆盆地的形成演化[M].成都:成都科技大学出版社,1993:17-21[Liu Shugen.The Formation and E-volution of Longmenshan Thrust Zone and Western Sichuan ForelandBasin,Sichuan,China[M].Chengdu:Press of Chengdu Universityof Science and Technology,1993:17-21]
11李勇,曾允孚,伊海生.龙门山前陆盆地沉积与构造演化[M].成都:成都科技大学出版社,1995:8-10[Li Yong,Zeng Yunfu,YiHaisheng.Sedimentary and Tectonic Evolution of the LongmenshanForeland Basin,Western Sichuan,China[M].Chengdu:Press ofChengdu University of Science and Technology,1995:8-10]
12苟宗海,赵兵,吴山.四川大邑、崇州、汶川、都江堰毗邻地区的侏罗系[J].成都理工学院学报,2000,27(1):31-39[Gou Zonghai,Zhao Bing,Wu Shan.Jurassic system of Dayi,Chongzhou,Wen-chuan and Dujiangyan,Sichuan[J].Journal of Chengdu University ofTechnology,2000,27(1):31-39]
13胡晓强,陈洪德,纪相田,等.川西前陆盆地侏罗系层序地层[J].西南石油学院学报,2006,28(2):16-19[Hu Xiaoqiang,ChenHongde,Ji Xiangtian,et al.Jurassic sequence stratrgraphy in thewest Sichuan foreland basin,China[J].Journal of Southwest Petrole-um Institute,2006,28(2):16-19]
14钱奕中,陈洪德,刘文均.层序地层学理论和研究方法[M].成都:四川科学技术出版社,1994:96-107[Qian Yizhong,Chen Hongde,Liu Wenjun.Sequence Stratigraphy Study Theories and ResearchMethods[M].Chengdu:Press of Sichuan Science and Technology,1994:96-107]
15丘东洲,付清平.川西坳陷南区侏罗系层序地层与油气[J].天然气工业,2000,20(4):5-10[Qiu Dongzhou,Fu Qingping.Sequencestratigraphy and hydrocarbon potential of Jurassic in the south part ofwest Sichuan depression[J].Natural Gas Industry,2000,20(4):5-10]
16郑荣才.四川盆地下侏罗统大安寨段高分辨率层序地层学[J].沉积学报,1998,16(2):42-49[Zheng Rongcai.High resolution se-quence stratigraphy of Daanzhai formation,lower Jurassic in Sichuanbasin[J].Acta Sedimentologica Sinica,1998,16(2):42-49]
17魏力民,柳梅青.川西新场蓬莱镇组层序地层研究与储层横向预测[J].石油与天然气地质,2000,21(3):220-225[Wei Limin,LiuMeiqing.Study on sequence stratigraphy of Penglaizhen formation inXinchang,west Sichuan and reservoir lateral prediction[J].Oil&Gas Geology,2000,21(3):220-225]
18 Galloway WE.Genetic stratigraphic sequence in basin analysis1:ar-chitecture and genesis of flooding-surface bounded depositional units[J].AAPG Bulletin,1989,73:125-142
19王亮国,余福林,邓康龄,等.川西坳陷侏罗系沉积环境[J].油气地质与采收率,2001,8(1):13-16[Wang Liangguo,Yu Fuling,Deng Kangling,et al.The sedimentary environment of Jurassic de-pression in west Sichuan[J].Petroleum Geology and Recovery Effi-ciency,2000,2001,8(1):13-16]
20王亮国,曹烈,邓康龄,等.川西坳陷侏罗系沉积相与生烃关系研究[J].沉积与特提斯地质,2001,21(1):38-43[Wang Liangguo,Cao Lie,Deng Kangling,et al.Jurassic sedimentary facies and hydro-carbon generation in west Sichuan depression[J].Sedimentary Geolo-gy and Tethyan Geology,2000,2001,21(1):38-43]
21朱志军,陈洪德,林良彪,等.川西前陆盆地蓬莱镇期层序岩相古地理特征及演化[J].地层学杂志,2009,33(3):113-120[Zhu Zhi-jun,Chen Hongde,Lin Liangbiao,et al.Sequence-based lithofaciesand paleogeographic characteristics and evolution of Penglaizhen For-mation in Western Sichuan Foreland Basin[J].Journal of Stratigra-phy,2009,33(3):113-120
22刘鸿允.中国古地理图集[M].北京:地质出版社,1955[LiuHongyun.Atlas of the Palaeogeography of China[M].Beijing:Geo-logical Publishing House,1955]
23王鸿祯,等.中国古地理图集[M].北京:科学出版社,1985[WangHongzhen,et al.Atlas of the Palaeogeography of China[M].Bei-jing:Science Press,1985]
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