The Sequence Stratigraphy Characteristics and Controlling Factors of the Shahejie Formation of the Central Uplift Belt in Paleogene in Huimin
-
摘要: 结合山东惠民凹陷中央隆起带古近系层序地层学研究,依据层序中湖平面变化特点和相应的沉积物特征,提出了构造运动和气候是本区层序地层发育的主要控制因素。中央隆起带古近系沙河街组二、三、四亚段可划分为 3种层序类型,即断陷初期型、强断陷期型和断陷后期型层序。由于构造运动导致湖岸线向盆地方向退缩,产生下降体系域,本次研究采用了体系域的四分法,即一个完整层序由低位、湖侵、高位和下降四个体系域组成,并且层序界面位于湖平面最大下降的位置,介于下降域和低位域之间。断陷初期红色地层层序,受气候因素控制明显,既不同于冲积地层层序,也不同于正常湖相地层层序,在层序演化上有其独特的特点。受构造作用和沉积物补给条件的影响,研究区发育三种沉积密集段,不同类型的沉积密集段在层序中所处位置不同,控制着不同的烃源岩厚度和油气资源储量。Abstract: The sequence stratig raphy studies of the Shahejie Formation in the central uplift belt of Huimin depression of Shandong province indicate that tectonic movement and climate are dominant controlling factors to sequence development.The 2, 3and 4 submembers of Shahejie Formation can be divided into three types of stratig raphic sequence, i.e.the stratigraphic sequence in primary rifting stage, the st ratigraphic sequence in violent rifting stage and the stratigraphic sequence in the later rifting stage.The sequence stratig raphy indicates that it is more suitable to divide a sequence into four system tracts in the lacusstrine basin including low stand system tract(LTS), lake-transgressive system tract (TST), highstand system ract (HST)and falling-stage tract (FST).According to characteristics of lake level change and its corresponding sediments, the sequence boundary is located between the LST and FST.The red beds stratig raphic sequence is mainly controlled by the climate and has unique characteristics in sequence evolution, which is different from the alluvial fan stratigraphic sequence and also different from the normal lake facies stratig raphic sequence.Influenced by tectonic movement and sediment supply,three kinds of stratigraphic sequence in this region form three kinds of condensed sections, which located in different section of each sequence.The different condensed section will influence the abundance of source rock and resources, and every condensed section controls the distribution and thickness of the source rock.
-
[1] Nummedal D. The falling sea level systems tract in ramp settings [A]. Abstract: Mesozoic of the western Interior[C]. SEPM Theme Mtg., Ft. Collins, Co., 1992 [2] 操应长.断陷湖盆层序地层下降体系域的划分[J].石油大学学报(自然科学版),2000,24(1):22～26[Cao Yingchang.Distinguishment of falling stage systems tract of sequence strata in a continental rift subsidence basin[J].Journal of the University of Petroleum,China (Edition of Natural Science),2000,24(1):22～26] [3] 金莉.强制海退概念与层序地层学体系域的讨论[J].中国海上油气(地质),1997,11(3):229～232[Jin Li,Qi Zuoming.Notion of forcible reflux and discuss of sequence stratigraphy system tract[J].China Offshore Oil and Gas(Geology),1997,11(3):229～232] [4] 操应长,姜在兴,李春华,等.山东惠民凹陷中央隆起带古近系沙三段层序地层及沉积演化[J].古地理学报,2002,4(3):40～46[Cao Yingchang,Jiang Zaixing,Li Chunhua,et al.Sequence stratigraphy and depositional evolution of the member 3 of Shahejie Formation in the western.Huimin depression of Shandong province[J].Journal of Palaeogeography,2002,4(3):40～46] [5] 王秉海,钱凯.胜利油区地质研究与勘探实践[M].山东东营:石油大学出版社,1992.188～190[Wang Binghai,Qian Kai.Geologic study and exploration practice in Shengli oil field[M].Dongying Shandong:The Petroleum University Press,1992.188～190] [6] 杨剑萍,操应长.惠民凹陷西部下第三系沙四段下部洪水-漫湖沉积特征[J].石油大学学报(自然科学版),2002,26(6):17～20[Yang Jianping,Cao Yingchang.Flood-overlake deposits in the lower forth member of the Oligocene Shahejie Formation in western Huimin depression [A].Journal of the University of Petroleum,China (Edition of Natural Science),2002,26(2):17～20] [7] 张勇,付金华,杜玉民. 惠民凹陷西部的断裂系统与油气藏[A].见: 信荃麟,刘泽容主编.复杂油气藏勘探技术国际学术研讨会论文集[C]. 山东东营:石油大学出版社,1998.21～27[Zhang Yong, Fu Jinhua,Du Yumin.Fracture system and reservoir in the western Huimin depression[A].In:Xin Quanlin,Liu Zerong,eds.Proceedings of international complex reservoir exploration technique symposium[C].Dongying Shandong:The Petroleum University Press,1988.21～27] [8] 姜在兴,操应长,邱隆伟,等.砂体层序地层学及沉积学研究[M].北京:地质出版社,2000.105～109[Jiang Zaixing,Cao Yingchang,Qiu Longwei,et al.Study of sandstone sequence stratigraphy and sedimentaology[A].Beijing:Geological Publishing House,2000.105～109] -
点击查看大图
计量
- 文章访问数: 506
- HTML全文浏览量: 4
- PDF下载量: 407
- 被引次数: 0
下载:
