松辽盆地泉四段扶余油层地层层序新认识
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摘要
松辽盆地泉四段扶余油层发育浅水湖泊三角洲相和浅水湖泊相,沉积构造环境属于闭塞浅水坳陷湖盆,其层序特征类似于稳定克拉通盆地层序,也类似于缓坡被动大陆边缘型盆地层序,气候是控制陆相坳陷盆地层序形成的主要因素,三级层序内总体应表现为水进体系域-高位体系域构成1个完整的层序,而低位体系域不发育。通过岩心、录井、地震等资料研究分析,认为泉四段扶余油层是1个三级层序,发育水进体系域和顶部薄层强制水退边缘体系域;泉四段与泉三段地层分界是其层序的底界;泉四段顶界地震反射层T2也是层序边界,是泉四段三级层序的顶界。精确识别和建立地层层序格架对石油勘探开发具有重要的指导意义。
Quan 4th member of the Fuyang oil layer of the Songliao basin belongs to shallow lacustrine-delta facies and shallow lacustrine facies.The sedimentary tectonic sets belong to closed depression shallow lacustrine basin,and the stratigraphic sequence is similar to that of a craton basin and a gentle slope divergent continental margin.Climatic change controlled the formation of stratigraphic sequence of depression lacustrine basins.A typical integrated third-grade climate sequence should be composed of both a trangressive systems tract(TST) and a highstand systems tract(HST),with no lowstand systems tract(LST) is developing.Through cores,well logs,seismic comprehensive studies,the Quan 4th member of the Fuyu oil layer was determined as a third-grade climate sequence,with includes both a trangressive systems tract(TST) and a forced regressive margin systems tract(FRMST) at the top.The boundary between Quan 4th member and Quan 3rd members is a sequence boundary and the top interface of the sequence is the seismic reflection horizon(T2) of the Quan 4th member.Accurate identification and development of the framework of sequence stratigraphy is of guiding significance to the exploration and development of oilfields.
Quan 4th member of the Fuyang oil layer of the Songliao basin belongs to shallow lacustrine-delta facies and shallow lacustrine facies.The sedimentary tectonic sets belong to closed depression shallow lacustrine basin,and the stratigraphic sequence is similar to that of a craton basin and a gentle slope divergent continental margin.Climatic change controlled the formation of stratigraphic sequence of depression lacustrine basins.A typical integrated third-grade climate sequence should be composed of both a trangressive systems tract(TST) and a highstand systems tract(HST),with no lowstand systems tract(LST) is developing.Through cores,well logs,seismic comprehensive studies,the Quan 4th member of the Fuyu oil layer was determined as a third-grade climate sequence,with includes both a trangressive systems tract(TST) and a forced regressive margin systems tract(FRMST) at the top.The boundary between Quan 4th member and Quan 3rd members is a sequence boundary and the top interface of the sequence is the seismic reflection horizon(T2) of the Quan 4th member.Accurate identification and development of the framework of sequence stratigraphy is of guiding significance to the exploration and development of oilfields.
引文
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[11]李延平,陈树民,宋永忠,等.大庆长垣及以东泉三、四段扶杨油层浅水湖泊-三角洲体系沉积特征[J].大庆石油地质与开发,2005,24(5):13-16.
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①任延广,等.松辽盆地中浅层地层层序及沉积相研究.大庆油田有限责任公司勘探开发研究院,1999:1-42(内部报告).
任延广,等.松辽盆地北部中浅层精细地质研究及勘探目标选择,大庆油田有限责任公司勘探开发研究院,2003:6-150(内部报告).
[2]王东坡,刘立,张立平,等.松辽盆地白垩纪古气候沉积旋回层序地层[M].长春:吉林大学出版社,1995.
[3]刘招君,董清水,王嗣敏,等.陆相层序地层学导论与应用[M].北京:石油工业出版社,2002.
[4]高瑞祺,蔡希源,任延广,等.松辽盆地油气田形成条件与分布规律[M].北京:石油工业出版社,1997.
[5]郭少斌,孙少波.松辽盆地层序地层学研究新认识[J].岩相古地理,1998,1(18):54-60.
[6]Van Wagoner J C,Posamentier H W,Mitchum R M,等.层序地层学基础和关键定义概述[J].地质科学译丛,1990,7(2):19-24.
[7]C K威尔格斯,B S哈思丁,C G St C K肯岛,等.层序地层学原理———海平面变化综合分析[M].北京:石油工业出版社,1993.
[8]Van Wagoner J C,Posamentier H W,Mitchum R M,et al.Anoverview of the fundamentals of sequence stratigraphy and key defini-tions[M].//Wilgus C K et al eds.Sea-level changes:an IntegratedApproach.[s.l.]:SEPM Special Publication,1988,42:39-45.
[9]Cross T A.High-resolutions stratigraphic correlation from the per-spective of base-level cycles and sediment accommodations[C].[s.l.]:Proceedings of Northwestern European Sequence StratigraphyCongress,1994:105-123.
[10]邓宏文,王红亮,祝永军,等.高分辨率层序地层学———原理及应用[M].北京:地质出版社,2002.
[11]李延平,陈树民,宋永忠,等.大庆长垣及以东泉三、四段扶杨油层浅水湖泊-三角洲体系沉积特征[J].大庆石油地质与开发,2005,24(5):13-16.
[12]池秋鄂,龚福华.层序地层学基础与应用[M].北京:石油工业出版社,2001.
[13]王璞,刘万洙.事件沉积导论实例应用[M].长春:吉林科学技术出版社,2001.
[14]Hunt D,Tucker M E.Stranded parasequnces and the forced regres-sive wedge systems tract:deposition during base-level fall[J].Sedi-mentary Geology,1992,81(1):1-9.
①任延广,等.松辽盆地中浅层地层层序及沉积相研究.大庆油田有限责任公司勘探开发研究院,1999:1-42(内部报告).
任延广,等.松辽盆地北部中浅层精细地质研究及勘探目标选择,大庆油田有限责任公司勘探开发研究院,2003:6-150(内部报告).
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