黄骅坳陷港中地区沙二段高分辨率层序地层格架与沉积体系分布
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摘要
应用T A.Cross高分辨率层序地层学理论,并综合运用地震、测井、岩心和分析化验资料,将港中地区古近系沙河街划分为5个长期基准面旋回、10个中期基准面旋回和41个短期基准面旋回。其中重点层位沙二段包括1个长期基准面旋回、3个中期基准面旋回和15个短期基准面旋回。长期旋回层序结构类型以向上变深再变浅的对称的C型结构为主,中短期旋回层序结构类型是以向上变深的A型或向上变浅的B型非对称型为主。识别出古近系沙二段主要发育3种沉积相类型:近岸水下扇、重力流水道和湖泊沉积,包括11种沉积微相;沙二段MSC3和MSC4时期,物源主要来自于西部的港西古凸起,至MSC5时期,物源方向由单一西部方向转为多方向物源供应。辫状重力流水道全都发育在近岸水下扇的前方,充足的物源供应是重力流水道发育的首要因素;辫状重力流水道的发育及分布与沉积期的古地貌有关,而断阶式断槽是港中地区古地貌的主要特征,因此,断阶式断槽是控制沙二段辫状重力流水道分布的主要因素。
Based on Cross T.A.genetic sequence stratigraphy theory and through a variety of data analysis,the Shahejie formation is divided into 5 long term cycles,10 middle term cycles and 41 short term cycles.The Second member of Shahejie formation includes 1 long term cycle,3 middle term cycles and 15 short term cycles.The main sequence structure of long term cycle is C-symmetrical structure which becomes darker up and then lighter,and the main sequence structure of middle and short term cycle is A-symmetrical structure which becomes lighter up or B-symmetrical structure which becomes darker up.Identified Shahejie Formation is developed into 3 types of sedimentary facies,i.e.subaqueous fan,gravity flow channel and lake sediments,including 11 microfacies.In MSC3 and MSC4 period,provenance is mainly from the Gangxi Ancient raised,MSC3 period,provenance direction is from the single West into an integrated provider of multi-source direction.The sufficient source supply is the primary factor of the development of gravity flow channel.The staged broken-off slots is the major control factor of the distribution of braided gravity flow channel.
Based on Cross T.A.genetic sequence stratigraphy theory and through a variety of data analysis,the Shahejie formation is divided into 5 long term cycles,10 middle term cycles and 41 short term cycles.The Second member of Shahejie formation includes 1 long term cycle,3 middle term cycles and 15 short term cycles.The main sequence structure of long term cycle is C-symmetrical structure which becomes darker up and then lighter,and the main sequence structure of middle and short term cycle is A-symmetrical structure which becomes lighter up or B-symmetrical structure which becomes darker up.Identified Shahejie Formation is developed into 3 types of sedimentary facies,i.e.subaqueous fan,gravity flow channel and lake sediments,including 11 microfacies.In MSC3 and MSC4 period,provenance is mainly from the Gangxi Ancient raised,MSC3 period,provenance direction is from the single West into an integrated provider of multi-source direction.The sufficient source supply is the primary factor of the development of gravity flow channel.The staged broken-off slots is the major control factor of the distribution of braided gravity flow channel.
引文
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[16]王春连,侯中健,刘丽红,等.板桥-北大港地区沙三段重力流沉积特征研究[J].岩性油气藏,2009,21(3):46-49.WANG Chun-lian,HOU Zhong-jian,LIU Li-hong,et al.Characteristics of gravity flow deposit of the third member of Shahejie Formation in Banqiao-Beidagang area[J].Lithologic Reservoirs.2009,21(3):46-49.
[17]严德天,王华,王家豪,等.黄骅坳陷沙河街组层序地层样式及隐蔽圈闭预测[J].中国矿业大学学报,2008,37(1):30-37.YAN De-tian,WANG Hua,WANG Jia-hao,et al.Sequence stratigraphic pattern and forecast of subtle reservoir of the Shahejie Formation in Huanghua depression[J].Journal of China University of Mining&Technology,2008,37(1):30-37.
[2]杨国安,邢卫东,刘广华,等.港中开发区沙河街组沉积微相与油气分布[J].西北大学学报:自然科学版,2004,34(1):93-96.YANG Guo-an,XING Wei-dong,LIU Guang-hua,et al.The lacustrine reservoir microface models and gas-oil distribution in Shahejie Formation of Gangzhong oilfield[J].Journal of Northwest University:Natural Science Edition,2004,34(1):93-96.
[3]范乐元,朱筱敏,宋琨,等.黄骅坳陷北大港构造带古近系沙河街组高分辨率层序地层格架及其对储层非均质性的控制[J].地层学杂志,2005,29(4):355-361.FAN Le-yuan,ZHU Xiao-min,SONG Kun,et al.High-resolution sequence-stratigraphic framework and its control on the reservoir heterogeneities of Beidagang tectonic belt in Huanghua sag[J].Journal of Stratigraphy,2005,29(4):355-361.
[4]苗顺德,冯有良,李秋芬.黄骅坳陷歧口凹陷古近系层序地层格架及其特征分析[J].现代地质,2007,21(4):697-704.MIAO Shun-de,FENG You-liang,LI Qiu-fen.Sequence stratigraphic framework and characteristics of palaeogene in the Qikou Sag,Huanghua depression[J].Geoscience,2007,21(4):697-704.
[5]王战,孟任庆,解建民,等.黄骅坳陷地区地质构造演化与油气分布[M].北京:科学出版社,1999:10-25.WANG Zhan,MENG Ren-qing,XIE Jian-min,et al.Huanghua depression geological tectonic evolution and hydrocarbon distribution[M].Beijing:Science Press,1999:10-25.
[6]SU Ni-na,JIN Zhen-kui,SONG Fan.Distribution and genesis of secondary pores in Paleogene clastic reservoirs of Beidagang structural belt in the Huanghua depression[J].Mining Science and Technology,2010,20:115-120.
[7]朱筱敏.层序地层学[M].东营:石油大学出版社,2000:147-156.ZHU Xiao-min.Sequence Stratigraphy[M].Dongying:China university of petroleum press,2000:147-156.
[8]邓宏文.美国层序地层研究中的新学派:高分辨率层序地层学[J].石油与天然气地质,1995,16(2):89-97.DENG Hong-wen.A new school of thought in sequence stratigraphic studies in US:High-resolution sequence stratigraphy[J].Oil&Gas geology,1995,16(2):89-97.
[9]吴因业.陆相盆地层序地层学分析的方法和实践[J].石油勘探与开发,1997,4(5):7-10.WU Yin-ye.The method and practice of sequence stratigraphic analysis in the nonmarine basins[J].Petroleum Exploration&Development,1997,4(5):7-10.
[10]Cross T A.High-resolution stratigraphy correlation from the perception of base level cycles and sediment accommodation[C]//Proceeding of Northwestern Europe Sequence Stratigraphy Congress.Sweden,1994:105-123.
[11]Galloway W E,Hobday D K.Terrigenous Clastic Depositional Systems:applications to fossil fuel and groundwater resources[M].Springer Verlag,1996:50.
[12]Brown L F Jr,Loucks R G,Trevino R H,et al.Site-specific sequence-stratigraphic section benchmark charts are key to regional chronostratigraphic systems tracts analysis in growth-faulted basins[J].AAPG Bull,Methods in Exploration Series,2005,(6):715-724.
[13]高志勇,郑荣才,罗平,等.陆相高分辨率层序地层中洪泛面特征研究[J].成都理工大学学报:自然科学版,2007,34(1):47-54.GAO Zhi-yong,ZHEN Rong-cai,LUO Ping,et al.A study of the flooding surface in the high-resolution stratigraphic sequence of continental deposit[J].Journal of Chengdu University of Technology:Science&Technology Edition,2007,34(1):47-54.
[14]刘春慧,金振奎,张鑫,等.高分辨率层序地层学理论在准噶尔盆地勘探中的应用[J].沉积学报,2008,26(2):250-255.LIU Chun-hui,JIN Zhen-kui,ZHANG Xin et al.Application of the theory of high-resolution sequence stratigraphy to Junggar Basin[J].Acta Sedimentologica Sinica,2008,26(2):250-255.
[15]郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分和研究意义[J].沉积学报,2001,19(2):249-255.ZHEN Rong-cai,PENG Jun,WU Chao-rong.Grade division of base-level cycles of Terrigenous Basin and its implications[J].Acta Sedimentologica Sinica,2001,19(2):249-255.
[16]王春连,侯中健,刘丽红,等.板桥-北大港地区沙三段重力流沉积特征研究[J].岩性油气藏,2009,21(3):46-49.WANG Chun-lian,HOU Zhong-jian,LIU Li-hong,et al.Characteristics of gravity flow deposit of the third member of Shahejie Formation in Banqiao-Beidagang area[J].Lithologic Reservoirs.2009,21(3):46-49.
[17]严德天,王华,王家豪,等.黄骅坳陷沙河街组层序地层样式及隐蔽圈闭预测[J].中国矿业大学学报,2008,37(1):30-37.YAN De-tian,WANG Hua,WANG Jia-hao,et al.Sequence stratigraphic pattern and forecast of subtle reservoir of the Shahejie Formation in Huanghua depression[J].Journal of China University of Mining&Technology,2008,37(1):30-37.
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