海安凹陷古近系沉积层序及对油气藏的控制
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
通过岩心、测井、地震以及分析化验等资料,本文对苏北盆地海安凹陷古近系进行了层序地层分析以及沉积相识别,进而研究了层序沉积体系的分布配置关系,揭示了主要油气藏分布规律。研究认为,从古近系泰州组到三垛组的盆地断陷阶段,海安凹陷经历了仪征、吴堡、真武和三垛等四次较大的构造抬升运动,形成了3个二级层序,在二级层序格架内可分为7个三级层序、17个体系域,其中主要的含油体系域包括SQ1-1低位体系域、SQ1-2低位体系域、SQ1-3高位体系域、SQ2-1湖侵体系域及SQ3-1低位体系域等;主要含油体系域发育的沉积相类型主要有扇三角洲、河流三角洲、辫状河三角洲以及湖相等;层序地层格架内体系域的沉积特征及空间位置的差异形成了不同的有利生储盖配置:SQ1-1低位体系域生储盖组合、SQ1-2低位体系域生储盖组合、SQ1-3高位体系域生储盖组合、SQ2-1湖侵体系域生储盖组合、SQ3-1低位体系域生储盖组合等。
Using data from cores,well logging,seismic and core enperiment,the sequence stratigraphy analysis and sedimentary facies identification of the Paleocene of Haian Depression in Subei Basin are conducted.The distribution and allocation relations of the sedimentary sequence system are obtained,revealing the distribution regularity of the major reservoirs in this area.The work shows that the Haian Depression had undergone four tectonic uplift movements(Yizheng movement,Wubao movement,Zhenwu movement and Sanduo movement) during the basin fault-depression stage from Taizhou Formation to Sanduo Formation periods,and 3 secondary-order sequences were formed.In those secondary-order sequence stratigraphic frameworks,the Paleocene of Haian Depression can be divided into 7 third-order sequences and 17 system tracts,and the main oil bearing system tracts include the lowstand system tract of SQ1-1,SQ1-2 and SQ3-1,the highstand system tract of SQ1-3,and the lake transgressive system tract of SQ2-1.There are 4 kinds of sedimentary systems identified in the main oil bearing system tract,including fan delta,river delta,braided delta and lake facies.The differences of sedimentary characteristics and the space location relationship of the system tracts cause the different matching relationship of favorable source-reservoir-cap assemblages,including the source-reservoir-cap assemblages of the lowstand system tract of SQ1-1,SQ1-2 and SQ3-1,the source-reservoir-cap assemblages of the highstand system tract of SQ1-3,and source-reservoir-cap assemblages of the lake transgressive system tract of SQ2-1.
引文
[1]陈书平,王小群等.海安凹陷上白垩统—新生界断裂形成及演化.石油地球物理勘探,2009,44(6):760~766Chen Shuping,Wang Xiaoqun et al.The fracture for-mation and its evolution from Upper Cretaceous toCenozoic in Hai’an Depression.OGP,2009,44(6):760~766
    [2]林畅松,刘景彦,张燕梅.沉积盆地动力学与模拟研究.地学前缘,1998,5(5):119~125Lin Changsong,Liu Jingyan,Zhang Yanmei.Geody-namic and modeling of sedimentary basins.EarthScience Frontiers,1998,5(5):119~125
    [3]马力,钱基.苏北—南黄海盆地的构造演化.江苏油气,1990,1(1):7~25Ma Li,Qian Ji.Structural evolution of Northern Jian-gsu-South Yellow Sea Basin.Jiangsu Oil and Gas,1990,1(1):7~25
    [4]陈安定.苏北箕状断陷形成的动力学机制.高校地质学报,2001,7(4):408~418Chen Anding.Dynamic mechanism of formation ofdustpan subsidence,Northern Jiangsu.GeologicalJournal of China Universities,2001,7(4):408~418
    [5]冉怀江,梁兴,陈方鸿.复杂小断层精细解释方法在洋心次凹的应用.石油地球物理勘探,2011,46(2):299~303Ran Huaijiang,Liang Xing,Cheng Fanghong.Ap-plication of seismic fine interpretation method of com-plex small fault in Yangxin Sub-Sag.OGP,2011,46(2):299~303
    [6]陆红梅.苏北盆地高邮凹陷陆相层序地层研究.断块油气田,2000,7(1):18~22Lu Hongmei.Continental sequence stratigraphy stud-y of Gaoyou Sag in Subei Basin.Fault-Block Oil&Gas Field,2000,7(1):18~22
    [7]张喜林,朱筱敏,钟大康.苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征.沉积学报,2004,22(3):393~398Zhang Xilin,Zhu Xiaomin,Zhong Dakang.The char-acter of sequence framework of Tertiary and UpperCretaceous in Gaoyou Sag,Subei Basin.Acta Sedim-entologica Sinica,2004,22(3):393~398
    [8]居春荣,黄杏珍,严存凤等.湖相碳酸盐岩在建立苏北盆地下第三系层序地层格架中的作用.沉积学报,2005,23(1):113~119Ju Chunrong,Huang Xinzhen,Yan Cunfeng.Role oflacustrine carbonate rock in establishment of sequencestratigraphy framework of Lower Tertiary in SubeiBasin.Acta Sedimentologica Sinica,2005,23(1):113~119
    [9]刘玉瑞.苏北后生断陷层序地层格架与沉积体系.复杂油气藏,2010,3(1):10~14Liu Yurui.Sequence-stratigraphic framework anddepositional system in Subei epigenetic-faulted Basin.Complex Hydrocarbon Reservoir,2010,3(1):10~14
    [10]徐田武,王英民,魏水建.苏北盆地海安凹陷下白垩统层序地层和沉积相研究.天然气地球科学,2008,19(3):351~355Xu Tianwu,Wang Yingmin,Wei Shuijian.Characte-ristics and evolution of Late Cretaceous sequence stra-tigraphy and sedimentary facies in Hai’an Sag.Nat-ural Gas Geoscience,2008,19(3):351~355

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心