Shallow Water Delta Sedimentation and Source-to-Sink Process in the South Slope Belt, Dongying Sag
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摘要: 源-汇系统研究是当今地质学研究热点.东营凹陷南缓坡沙二段沉积时期是构造稳定的斜坡带,与其物源区广饶凸起构成完整的源-汇系统.基于岩心、测井、分析化验及三维地震资料,精细刻画研究区古地貌形态及沉积物搬运通道,明确沙二段浅水辫状河三角洲沉积特征;通过地震属性与钻井岩性标定,明确沉积体系分布及时空演化关系,探讨沉积主控因素及源-汇体系配置关系.结果表明,物源区自西向东发育i~iii三个汇水单元,及V1~V4四个古沟谷,碎屑沉积物通过古沟谷搬运输送,向滨-浅湖沉积环境的缓坡(0.52°~1.29°)沉积区供源,形成平面上河道频繁分叉改道、垂向上多个正韵律叠置、岩性以分选中等、磨圆较好的含砾砂岩为主的浅水辫状河三角洲沉积.自沙二下亚段沉积期到沙二上亚段沉积期,沉积体向前推进,规模增大,沉积体系垂向演化主要受控于古气候变化导致的湖平面升降.平面上,Ⅰ~Ⅲ沉积区内朵叶体形态及规模受控于源区汇水单元面积、垂向高差及通道形态与规模,朵叶体面积与垂向高差及汇水单元面积呈正相关.Abstract: The study of Source-to-Sink system is a hot topic in geology research. During the sedimentary period of the second member of the Shahejie Formation (Es2), the structural stable south slope belt in the Dongying sag and its source area Guangrao uplift constituted a complete Source-to-Sink system. In this study, we analyze the paleogeomorphy, the characteristics of sediment transfer pathways and the braided shallow-water delta depositional system based on cores, logging, analytical experiment data and 3D seismic data. This paper presents in detail the sedimentary system distribution, the spatial and temporal relationship, the dominant factor of sedimentary process and sediment-dispersal patterns of the Source-to-Sink system in study area by the seismic attribute and lithology analysis. The results show there are three (ⅰ-ⅲ) catchments, four (V1-V4) paleo-valleys from west to east in the source area. The clastic sediments supply to the deposition area, which is shore-shallow lake deposit environment gentle slope (0.52°-1.29°), by the transportation of paleo-valley. This process contributes to a moderate sorted, well rounding pebbly sandstone braided shallow-water delta system that river channel diverges frequently in the plane, several positive rhythm sediments overlay vertically. The sedimentary bodies increase from lower Es2 to upper Es2. The vertical evolution of the sedimentary system is mainly controlled by the lake-level fluctuation resulted from the paleoclimatic change. In the plane, the form and scale of the lobes body in Ⅰ-Ⅲ sedimentary area are controlled by the geomorphology vertical elevation difference of the source area, the area of the catchments, the form and scale of the pathways. It shows a positive correlation among the area of the lobes body, the vertical elevation difference and the area of the catchment.
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Key words:
- shallow-water delta /
- paleogeomorphy /
- Source-to-Sink system /
- seismic attribute /
- sedimentation /
- Dongying sag /
- petroleum geology
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图 7 东营凹陷南缓坡沙二段浅水三角洲典型沉积构造
a.Gn104井,1 755 m,粗砂岩,楔状交错层理;b.Gn104井,1 849 m,中-粗砂岩,平行层理;c.Gn7井,2 103.1 m,泥岩,植物碎片;d.Gn12井,2 380.1 m,细-中砂岩,板状交错层理;e.Gn12井,2 380.3 m,中砂岩,槽状交错层理;f.Gn12井,2 384.7 m,粗砂岩与泥岩,冲刷面
Fig. 7. Typical sedimentary structures of the shallow-water delta of Es2 in the south slope belt of Dongying sag
图 8 东营凹陷南缓坡沙二段浅水三角洲顺物源方向前积地震相(a)及垂直物源方向丘状地震相(b)
测线位置见图 1b
Fig. 8. Progradational seismic facies in parallel source direction (a) and mounded seismic facies in vertical source direction (b) of the shallow-water delta of Es2 in south slope belt of Dongying sag
表 1 东营凹陷南缓坡物源通道特征参数统计
Table 1. Characteristic parameters of sediment transfer pathway in south slope belt of Dongying sag
物
源
区汇水单元编号 ⅰ区 ⅱ区 ⅲ区 汇水单元形态 地势较平坦,垂向高差小 局部隆起与侵蚀沟谷构成的山谷地貌,地形高差大 汇水单元面积(km2) 8.3 9.0 10.2 垂向高差(m) 126.8 204.2 325.5 搬
运
通
道古沟谷编号 V1 V2 V3 V4 古沟谷形态 较窄、较浅的复合W型 较宽且深 较窄、较浅 宽且深的复合W型 宽(km) 1.6 2.9 1.4 6.2 深(km) 0.9 1.3 0.8 1.3 宽/深 1.77 2.23 1.75 4.76 截面面积(km2) 1.2 2.5 0.8 5.6 表 2 东营凹陷南缓坡沙二段岩性组合特征与地震属性关系
Table 2. Relationship between lithologic association and RMS amplitude attribute of Es2 in south slope belt of Dongying sag
井号 层位 含砂率 砂泥岩组合关系 灰质含量(%) 均方根振幅属性强度 属性颜色 Ca10 Es2U >0.6 巨厚层含砾砂岩夹薄层泥岩 0 中-弱振幅体 绿色 Gn121 Es2U >0.6 厚层含砾砂岩与薄层泥岩互层 15.63 强振幅体 红色 Gnx15 Es2L 0.3~0.6 中薄层含砾砂岩与中薄层泥岩互层 0 强振幅体 红色 Gn1 Es2L <0.3 厚层泥岩夹薄层砂岩 0 弱振幅体 蓝色 表 3 东营凹陷南缓坡沙二段主要源-汇配置关系
Table 3. Sediment-dispersal patterns of Source-to-Sink systems of Es2 in south slope belt of Dongying sag
分区编号 ⅰ区-Ⅰ区 ⅱ区-Ⅱ区 ⅲ区-Ⅲ区 物源区 汇水单元面积(km2) 8.3 9.0 10.2 垂向高差(m) 126.8 204.2 325.5 搬运区 源汇交界处沟谷截面面积(km2) 1.2 3.3 5.6 沉积区 沙二上沉积朵叶体面积(km2) 111.92 128.87 109.23 沙二下沉积朵叶体面积(km2) 108.65 98.54 110.12 -
Allen, P.A., 2005.Concept Striking a Chord.Nature, 434(7036):961-961.doi: 10.1038/434961a Allen, P.A., 2008a.From Landscapes into Geological History.Nature, 451(7176):274-276.doi:10.1038/nature 06586 Allen, P.A., 2008b.Time Scales of Tectonic Landscapes and Their Sediment Routing Systems.Geological Society London Special Publications, 296(1):7-28.doi:10.1144/SP 296.2 Allen, P.A., Hovius, N., 1998.Sediment Supply from Landslide-Dominated Catchments:Implications for Basin-Margin Fans.Basin Research, 10(1):19-35.doi: 10.1046/j.1365-2117.1998.00060.x Bi, Y.Q., 2002.Sandbody Formation Models and Pool-Forming Regulations in the Southern Slope of Binxian Prominence of Dongying Sag.Journal of China University of Petroleum:Natural Science Edition, 26(4):12-15 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYDX200204003.htm Cao, Y.C., Wang, J., Liu, H.M., et al., 2009.Sedimentary Characteristics and Models of Beach-Bar Sandbodies in the Upper Part of the Fourth Member of Paleogene in the South Slope of Dongying Depression.Journal of China University of Petroleum:Natural Science Edition, 33(6):5-10 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYDX200906004.htm Carter, D.C., 2003.3-D Seismic Geomorpholoy:Insights into Fluvial Reservoir Deposition and Performance, Widuri Field, Java Sea.AAPG Bulletin, 87(6):909-934.doi: 10.1306/01300300183 Chen, Z.H., Zha, M., Liu, T.X., 2008.Response and Evolution of Formation Water Chemical Fields of the Paleogene in Dongying Sag.Journal of Lake Sciences, 20(6):705-714 (in Chinese with English abstract). doi: 10.18307/2008.0607 Deng, H.W., Wang, H.L., Wang, D.Z., 2001.Control of Paleo-Morphology to Stratigraphic Sequence in Continental Rift Basins:Take Lower Tertiary of Western Slope in Bozhong Depression as an Example.Oil & Gas Geology, 22(4):293-296 (in Chinese with English abstract). http://linkinghub.elsevier.com/retrieve/pii/S187257910860024X Guo, S.B., Sun, S.H., 2006.Rebuilding Paleogeomorphology of Pre-Jurassic and Oil-Gas Accumulation Regulation in Zhoujiawan Area.Earth Science, 31(3):372-377 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQKX200603013.htm Hoy, R.G., Ridgway, K.D., 2003.Sedimentology and Sequence Stratigraphy of Fan-Delta and River-Delta Deposystems, Pennsylvanian Minturn Formation, Colorado.AAPG Bulletin, 87(7):1169-1191.dio:10.1306/03110300127 doi: 10.1306/03110300127 Jia, D.H., Wu, X.H., Zhao, L.C., et al., 2005.The Grain Size Analysis for the Shallow-Water Delta Microfacies:An Example from One Well in the Bozhong 25-1 Southern Oil Field.Sedimentary Geology & Tethyan Geology, 25(4):87-94 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-TTSD200504014.htm Jia, G.H., 2013.Reservoir Characteristic and Control Factors of Paleogene Red Sandstones in Southern Slope of Dongying Sag.Journal of Northeast Petroleum University, 37(3):48-58 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQSY201303008.htm Lai, W.C., Song, Z.Q., Zhou, X.H., et al., 2010.Model of Dynamic Source Controlling Sand.Petroleum Exploration & Development, 37(6):763-768 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SKYK201006020.htm Li, S.L., Zhu, X.M., Li, H.Y., et al., 2017.Quantitative Characterization of Elements and Coupling Mode in Source-to-Sink System:A Case Study of Shahejie Formation between the Shahejie Uplift and Shanan Sag, Bohai Sea.China Offshore Oil & Gas, 4(29):39-50 (in Chinese with English abstract). http://d.wanfangdata.com.cn/Periodical/zghsyq-gc201704005 Li, S.J., Zheng, D.S., Jiang, Z.X., et al., 2005.Water Depth of Palaeo-Lacustrine Basin Recovered by Dominance Diversity of Ostracoda:An Example from Sedimentary Period of the Member 3 of Shahejie Formation of Paleogene in Dongying Sag, Shandong Province.Journal of Palaeogeography, 7(3):399-404 (in Chinese with English abstract). https://www.sciencedirect.com/science/article/pii/S0037073817302051 Lee, K., Mcmechan, G.A., Gani, M.R., et al., 2007.3-D Architecture and Sequence Stratigraphic Evolution of a Forced Regressive Top-Truncated Mixed-Influenced Delta, Cretaceous Wall Creek Sandstone, Wyoming, U.S.A..Journal of Sedimentary Research, 77(4):303-323.dio:10.2110/jsr.2007.031 doi: 10.2110/jsr.2007.031 Lin, C.S., Xia, Q.L., Shi, H.S., et al., 2015.Geomorphological Evolution, Source to Sink System and Basin Analysis.Earth Science Frontiers, 22(1):9-20 (in Chinese with English abstract). http://d.wanfangdata.com.cn/Periodical/dxqy201501002 Lou, Z.H., Yuan, D., Jin, A.M., 2004.Types, Characteristics of Sandbodies in Shallow-Water Deltafront and Sedimentary Models in Northern Songliao Basin, China.Journal of Zhejiang University, 31(2):211-215 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-HZDX200402022.htm Ruan, Z., Tan, G.H., Yu, B.S., et al., 2013.Sand Bodies in a Shallow Lake Basin:The PI Oil Bed in the Lasaxing Area, Songliao Basin.Journal of Stratigraphy, 37(3):321-330 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DCXZ201303010.htm Sheng, W.B., Cao, Y.C., Liu, H., et al., 2008.Evolutionary Characteristics of the Palaeogene Basin-Controlling Boundary Faults and Types of Basin Architectures in the Dongying Sag.Oil & Gas Geology, 29(3):290-296 (in Chinese with English abstract). http://www.sciencedirect.com/science/article/pii/S1674984716300738 Sømme, T.O., Helland-Hansen, W., Martinsen, O.J., et al., 2009.Relationships between Morphological and Sedimentological Parameters in Source-to-Sink Systems:A Basis for Predicting Semi-Quantitative Characteristics in Subsurface Systems.Basin Research, 21(4):361-387.doi: 10.1111/j.1365-2117.2009.00397.x Sømme, T.O., Jackson, A.L., 2013.Source-to-Sink Analysis of Ancient Sedimentary Systems Using a Subsurface Case Study from the Møre-Trøndelag Area of Southern Norway:Part2-Sediment Dispersal and Forcing Mechanisms.Basin Research, 25(5):512-531.doi: 10.1111/bre.12014 Wang, B.H., Qian, K., 1992.Geological Research and Exploration Practice in Shengli Oil Field.Petroleum University Publishing House, Dongying (in Chinese). Wang, R., 2007.Formation and Occurrence of Statigraphy Oil-Pools in the Jiyang Super-Depression (Dissertation).China University of Petroleum, Dongying (in Chinese with English abstract). Xu, C.G., Jiang, P.H., Wu, F.D., et al., 2002.Discovery and Sedimentary Characteristics of the Neogene Delta in Bozhong Depression and Its Significance for Oil and Gas Exploration.Acta Sedimentologica Sinica, 20(4):588-594 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB200204008.htm Xu, C.G., 2013.Controlling Sand Principle of Source-Sink Coupling in Time and Space in Continental Rift Basins:Basic Idea, Conceptual Systems and Controlling Sand Models.China Offshore Oil & Gas, 25(4):1-11 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZHSD201304002.htm Xu, C.G., Du, X.F., Xu, W., et al., 2017.New Advances of the "Source-to-Sink" System Research in Sedimentary Basin.Oil & Gas Geology, 38(1):1-11 (in Chinese with English abstract). Zhang, S.Q., Ji, Y.L., 1998.The Control of the Sequence Development by the Paleogene Ancient Climate Change in Dongying Sag.Journal of China University of Petroleum:Natural Science Edition, 6(22):26-30 (in Chinese). http://www.sciencedirect.com/science/article/pii/S0264817212001341 Zhang, X., Zhang, J.L., 2007.Sedimento-Geochemical Features of Sandstones from the Fourth Member, Shahejie Formation in the Southern Slope of Dongying Sag.Chinese Journal of Geology, 42(2):303-318 (in Chinese with English abstract). Zhao, W., Qiu, L.W., Jiang, Z.X., et al., 2011.Depositional Evolution and Model of Shallow Water Delta in the Rifting Lacustrine Basins during the Shrinking Stage:A Case Study of the Third Member and Second Member of Paleogene Shahejie Formation in the Niuzhuang Subsag Dongying Sag.Acta Geologica Sinica, 85(6):1019-1027 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZXE201106010.htm Zhu, W.L., Li, J.P., Zhou, X.H., et al., 2008.Neogene Shallow Water Deltaic System and Large Hydrocarbon Accumulations in Bohai Bay, China.Acta Sedimentologica Sinica, 26(4):575-582 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB200804007.htm Zhu, X.M., Liu, Y., Fang, Q., et al., 2012.Formation and Sedimentary Model of Shallow Delta in Large-Scale Lake.Example from Cretaceous Quantou Formation in Sanzhao Sag, Songliao Basin.Earth Science Frontiers, 19(1):89-99 (in Chinese with English abstract). http://d.wanfangdata.com.cn/Periodical/dxqy201201013 Zhu, X.M., Li, S.L., Pan, R., et al., 2016.Current Hot Topics and Advances of Sedimentology:A Summary from 32nd IAS Meeting of Sedimentology.Journal of Palaeogeography, 18(5):699-716 (in Chinese with English abstract). https://eprints.utas.edu.au/view/types/conference=5Fitem.html Zou, C.N., Zhao, W.Z., Zhang, X.Y., et al., 2008.Formation and Distribution of Shallow-Water Deltas and Central-Basin Sandbodies in Large Open Depression Lake Basins.Acta Geologica Sinica, 82(6):813-825 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZXE200806012.htm 毕义泉, 2002.东营凹陷滨县凸起南坡砂砾岩体成因模式与成藏规律.中国石油大学学报:自然科学版, 26(4):12-15. http://d.wanfangdata.com.cn/Periodical/sydxxb200204005 操应长, 王健, 刘惠民, 等, 2009.东营凹陷南坡沙四上亚段滩坝砂体的沉积特征及模式.中国石油大学学报:自然科学版, 33(6):5-10. http://d.wanfangdata.com.cn/Periodical/sydxxb200906002 陈中红, 查明, 刘太勋, 2008.东营凹陷古近系古湖盆演化与水化学场响应.湖泊科学, 20(6):705-714. doi: 10.18307/2008.0607 邓宏文, 王红亮, 王敦则, 2001.古地貌对陆相裂谷盆地层序充填特征的控制——以渤中凹陷西斜坡区下第三系为例.石油与天然气地质, 22(4):293-296. doi: 10.11743/ogg20010402 郭少斌, 孙绍寒, 2006.周家湾地区前侏罗纪古地貌恢复及油气富集规律.地球科学, 31(3):372-377. http://www.earth-science.net/WebPage/Article.aspx?id=1560 加东辉, 吴小红, 赵利昌, 等, 2005.渤中25-1南油田浅水三角洲各微相粒度特征分析.沉积与特提斯地质, 25(4):87-94. http://d.wanfangdata.com.cn/Periodical/yxgdl200504015 贾光华.2013.东营凹陷南坡古近系红层砂体储层特征及控制因素.东北石油大学学报, 37(3):48-58. http://d.wanfangdata.com.cn/Periodical/dqsyxyxb201303007 赖维成, 宋章强, 周心怀, 等, 2010."动态物源"控砂模式.石油勘探与开发, 37(6):763-768. http://d.wanfangdata.com.cn/Periodical/syktykf201006018 李顺利, 朱筱敏, 李慧勇, 等, 2017.源汇系统定量表征及耦合模式——以沙垒田凸起与沙南凹陷沙河街组为例.中国海上油气, 4(29):39-50. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=zhsd201704005&dbname=CJFD&dbcode=CJFQ 李守军, 郑德顺, 姜在兴, 等, 2005.用介形类优势分异度恢复古湖盆的水深——以山东东营凹陷古近系沙河街组沙三段湖盆为例.古地理学报, 7(3):399-404. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gdlx200503013&dbname=CJFD&dbcode=CJFQ 林畅松, 夏庆龙, 施和生, 等, 2015.地貌演化、源-汇过程与盆地分析.地学前缘, 22(1):9-20. http://d.wanfangdata.com.cn/Thesis/D367359 楼章华, 袁笛, 金爱民, 2004.松辽盆地北部浅水三角洲前缘砂体类型、特征与沉积动力学过程分析.浙江大学学报理学版, 31(2):211-215. http://d.wanfangdata.com.cn/Periodical/zjdxxb200402022 阮壮, 谭广辉, 于炳松, 等, 2013.浅水湖盆内砂体类型及其控制因素分析——以松辽盆地喇萨杏地区PI油层为例.地层学杂志, 37(3):321-330. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dcxz201303010&dbname=CJFD&dbcode=CJFQ 盛文波, 操应长, 刘晖, 等, 2008.东营凹陷古近纪控盆断层演化特征及盆地结构类型.石油与天然气地质, 29(3):290-296. doi: 10.11743/ogg20080302 王秉海, 钱凯, 1992.胜利油气地质研究与勘探实践.东营:石油大学出版社. 王锐, 2007. 胜利探区地层油藏富集规律与勘探技术研究(博士学位论文). 东营: 中国石油大学. http://cdmd.cnki.com.cn/Article/CDMD-10425-2007226405.htm 徐长贵, 2013.陆相断陷盆地源-汇时空耦合控砂原理:基本思想、概念体系及控砂模式.中国海上油气, 25(4):1-11. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=zhsd201304002&dbname=CJFD&dbcode=CJFQ 徐长贵, 杜晓峰, 徐伟, 等, 2017.沉积盆地"源-汇"系统研究新进展.石油与天然气地质, 38(1):1-11. doi: 10.11743/ogg20170101 徐长贵, 姜培海, 武法东, 等, 2002.渤中坳陷上第三系三角洲的发现、沉积特征及其油气勘探意义.沉积学报, 20(4):588-594. http://d.wanfangdata.com.cn/Periodical/cjxb200204009 张世奇, 纪友亮, 1998.东营凹陷早第三纪古气候变化对层序发育的控制.中国石油大学学报:自然科学版, 6(22):26-30. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=sydx806.003&dbname=CJFD&dbcode=CJFQ 张鑫, 张金亮, 2007.东营凹陷南坡沙河街组四段砂岩地球化学特征.地质科学, 42(2):303-318. http://d.wanfangdata.com.cn/Periodical/dzkx200702006 赵伟, 邱隆伟, 姜在兴, 等, 2011.断陷湖盆萎缩期浅水三角洲沉积演化与沉积模式——以东营凹陷牛庄洼陷古近系沙三段上亚段和沙二段为例.地质学报, 85(6):1019-1027. http://d.wanfangdata.com.cn/Periodical/dizhixb201106010 朱伟林, 李建平, 周心怀, 等, 2008.渤海新近系浅水三角洲沉积体系与大型油气田勘探.沉积学报, 26(4):575-582. http://d.wanfangdata.com.cn/Periodical/cjxb200804005 朱筱敏, 刘媛, 方庆, 等, 2012.大型坳陷湖盆浅水三角洲形成条件和沉积模式:以松辽盆地三肇凹陷扶余油层为例.地学前缘, 19(1):89-99. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=dxqy201201012&dbname=CJFD&dbcode=CJFQ 朱筱敏, 李顺利, 潘荣, 等, 2016.沉积学研究热点与进展:第32届国际沉积学会议综述.古地理学报, 18(5):699-716. doi: 10.7605/gdlxb.2016.05.052 邹才能, 赵文智, 张兴阳, 等, 2008.大型敞流坳陷湖盆浅水三角洲与湖盆中心砂体的形成与分布.地质学报, 82(6):813-825. http://d.wanfangdata.com.cn/Periodical/dizhixb200806011