鄂尔多斯盆地三叠系延长组事件沉积及其地质意义
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摘要
通过大量的岩心观察、野外剖面观测以及钻测井资料、分析化验数据的分析,对鄂尔多斯盆地延长组事件沉积进行研究。研究结果表明,研究区存在地震事件、火山事件、缺氧事件和重力流沉积事件;通过对各事件沉积物基本特征的认识以及这些事件沉积之间的时空组合关系的详细研究,发现这些事件沉积并非独立存在,彼此之间联系紧密:时间上,它们的高潮期均发生在长7早期,空间上,它们互相共生并与延长期湖盆的充填史有关;自湖盆边缘至湖盆中心,这些事件沉积被很好地记录下来,深湖区发育缺氧事件形成的优质烃源岩、因地震事件及火山事件而触发形成的重力流沉积事件砂体,它们形成了鄂尔多斯盆地延长组重要的岩性油气藏。结合盆地的构造史分析认为,这些事件沉积是秦岭造山事件的响应。
Based on the observations of a great number of core, well log data, field investigation and analyzing the data of analysis assay, the event deposit of Yanchang Formation are researched in Ordos Basin. The results show that there are some event deposit in the basin, such as seismic event, volcanic event, anoxic event and gravity flow event. It is founded that these event deposit are independent of each other through the recognizing of seismic events sediment characteristics and careful studing on the spatial assemblage characteristics among the event deposit.These event doposits have close relationship between each other.In the time domain, the activity peak of all event deposit is appearance in early Chang 7. In the space domain, they have mutual paragenesis and relationship with the evolution of lake basin.These event deposits are recorded from margin to central of lake basin. The most important lithologic reservoir is formed by high quality source rocks because of the anoxic event and gravity flow sand body triggered by seismic event or volcanic event in deep water.This paper shows that these event deposits are the response on the Qinling orogenic event with the tectonic history analysis in Ordos Basin.
Based on the observations of a great number of core, well log data, field investigation and analyzing the data of analysis assay, the event deposit of Yanchang Formation are researched in Ordos Basin. The results show that there are some event deposit in the basin, such as seismic event, volcanic event, anoxic event and gravity flow event. It is founded that these event deposit are independent of each other through the recognizing of seismic events sediment characteristics and careful studing on the spatial assemblage characteristics among the event deposit.These event doposits have close relationship between each other.In the time domain, the activity peak of all event deposit is appearance in early Chang 7. In the space domain, they have mutual paragenesis and relationship with the evolution of lake basin.These event deposits are recorded from margin to central of lake basin. The most important lithologic reservoir is formed by high quality source rocks because of the anoxic event and gravity flow sand body triggered by seismic event or volcanic event in deep water.This paper shows that these event deposits are the response on the Qinling orogenic event with the tectonic history analysis in Ordos Basin.
引文
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[20] 陈世悦,袁文芳,鄢继华.济阳拗陷早第三纪震积岩的发现及其意义[J].地质科学,2003,38(3):377-386.
[21] 邱欣卫,刘池洋,王建强.鄂尔多斯盆地晚三叠世深湖区同沉积变形构造特征及成因[J].地质科学,2013,48(1):204-216.
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[23] 王争鸣.缺氧沉积环境的地球化学指标[J].甘肃地质学报,2003,1(2):55-59.
[24] 赵俊兴,陈洪德,付锁堂,等.鄂尔多斯盆地南部延长组中几个重要事件沉积及其油气聚集关系[J].矿物岩石,2008,28(3):90-95.
[25] YANG Renchao,FAN Aiping,HAN Zuozhen,et al.Lithofacies and origin of the Late Triassic muddy gravity-flow deposits in the Ordos Basin,central China[J].Marine and Petroleum Geology,2017,85:194-219.
[26] 李相博,陈启林,刘化清.鄂尔多斯盆地延长组3种沉积物重力流及其含油性[J].岩性油气藏,2010,22(3):16-22.
[27] SHANMUGAM G.Hanmugam.50 year of the turbidite paradigm(1950—1990):Deep-water processes and facies models-a critical perspective[J].Marine and Petroleum Geology,2000,17(2):285-342.
[28] 袁珍,李文厚,范萌萌,等.深水块状砂岩沉积特征及其成因机制探讨:以鄂尔多斯盆地东南缘上三叠统长6油层组为例[J].地质科技情报,2011,30(4):43-49.
[29] 陈全红,李文厚,高永祥,等.鄂尔多斯盆地上三叠统延长组深湖沉积与油气聚集意义[J].中国科学(D辑:地球科学),2007,37(S1):39-48.
[30] 鄢继华,陈世悦,宋国奇,等.三角洲前缘滑塌浊积岩形成过程初探[J].沉积学报,2004,22(4):573-579.
[31] 陈安清,陈红德,候明才,等.鄂尔多斯盆地中晚三叠世事件沉积对印支运动Ⅰ幕的指示[J].沉积学报,2011.85(10):1682-1690.
[32] 万天丰,朱鸿.中国大陆及邻区中生代新生代大地构造与环境变迁[J].现代地质,2002,16(2):107-120.
[33] 张文,李玉宏,张乔,等.鄂尔多斯盆地南部延长组时代划分及长73对印支Ⅰ幕的响应[J].地球科学,2017,42(9):1565-1577.
[34] 林世国,郑荣才,刘满仓.陆相碎屑震积岩形成机理及其研究意义[J].天然气地球科学,2013,24(1):78-85.
[35] 张文正,杨华,彭平安,等.晚三叠世火山活动对鄂尔多斯盆地长7优质烃源岩发育的影响[J].地球化学,2009,38(6):573-582.
[36] 刘池洋,赵俊峰,马艳萍,等.富烃拗陷特征及其形成研究现状与问题[J].地学前缘,2014,21(1):75-88.
[37] 左智峰,戚颖,葛小瑞,等.鄂尔多斯盆地晚三叠世火山物质对油气成藏条件的影响[J].兰州大学学报(自然科学版),2008,44(3):12-15.
[38] 王建强,刘池洋,李行,等.鄂尔多斯盆地南部延长组长7段凝灰岩形成时代、物质来源及其意义[J].沉积学报,2017,35(4):691-705.
[39] 杨华,田景春,王峰,等.鄂尔多斯盆地三叠纪延长组沉积期湖盆边界与底形与事件沉积研究[M].北京:地质出版社,2009.
[2] 叶先仁,任建国,陶明信,等.事件沉积及其周期性的氦同位素指示[J].沉积学报,2003,21(4):640-648.
[3] KAUFFMAN E G,ELDER W P,SEGEMAN B B.High-resolution Correlation:A New Tool in Chronootigraphy,in Cydes and Events in Stratigraphy Leds[M].Heidelberg:Springer,1991.
[4] 孙宁亮,钟建华,田东恩,等.鄂尔多斯盆地南部延长组事件沉积与致密油的关系[J].中国石油大学学报(自然科学版),2017,41(6):30-41
[5] 王峰,田景春,范立勇,等.鄂尔多斯盆地三叠系延长组沉积充填演化及其对印支构造运动的响应[J].天然气地球科学,2010,21(6):882-890.
[6] 夏青松,田景春.鄂尔多斯盆地南部上三叠统延长组震积岩的发现及地质意义[J].沉积学报,2007,25(2):246-252.
[7] 李洁,陈洪德,林良彪,等.鄂尔多斯盆地东南部延长组古地震效应及其地质启迪[J].地质评论,2010,56(4):480-489.
[8] 刘旋,桂小军,丁晓琪,等.鄂尔多斯盆地南部晚三叠世时间沉积秦岭造山耦合分析[J].东北石油大学学报,2014,38(4):59-67.
[9] 邓秀芹,李文厚,刘新社,等.鄂尔多斯盆地中三叠统地层界线讨论[J].地质学报,2009,83(8):1089-1098.
[10] 何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003.
[11] 杨俊杰,李克勤,宋国初,等.中国石油地质志(卷四)[M].北京:石油工业出版社,1992:62-67.
[12] 陈飞,胡光义,孙立春,等.鄂尔多斯盆地南部上三叠统延长组层序地层格架内沉积相特征与演化[J].古地理学报,2012,14(3):321-322.
[13] 完颜容,李相博,刘化清,等.鄂尔多斯盆地延长组下组合沉积期湖盆迁移演化及沉积响应[J].成都理工大学学报(自然科学版),2014,41(1):27-36.
[14] 田媛,钟建华,王书宝,等.鄂尔多斯盆地富县探区三叠系延长组震积岩及其地质意义[J].古地理学报,2015,17(4):541-553.
[15] SEILACHER A.Fault-grade bed interpreted as seismites[J].Sedimentology,1969,13(1/2):155-159.
[16] 乔秀夫.中国震积岩的研究与展望[J].地质评论,1996,42(4):317-321.
[17] 乔秀夫,宋天锐,高林志,等.碳酸盐岩振动液化地震序列[J].地质学报,1994,68(1):16-32.
[18] 宋天悦.北京十三陵前寒武纪碳酸盐岩地层中的一套可能的地震海啸序列[J].科学通报,1988,38(8):609-611.
[19] 吴贤涛,尹国勋.四川峨眉晚侏罗世湖泊沉积中震积岩的发现及其意义[J].沉积学报,1992,10(3):19-24.
[20] 陈世悦,袁文芳,鄢继华.济阳拗陷早第三纪震积岩的发现及其意义[J].地质科学,2003,38(3):377-386.
[21] 邱欣卫,刘池洋,王建强.鄂尔多斯盆地晚三叠世深湖区同沉积变形构造特征及成因[J].地质科学,2013,48(1):204-216.
[22] JONES B J,MANNING A C.Comparison of geochemical indices used for the interpretation of palaeoredox conditions in ancient mudstones[J].Chem Geol,1994,111:111-129.
[23] 王争鸣.缺氧沉积环境的地球化学指标[J].甘肃地质学报,2003,1(2):55-59.
[24] 赵俊兴,陈洪德,付锁堂,等.鄂尔多斯盆地南部延长组中几个重要事件沉积及其油气聚集关系[J].矿物岩石,2008,28(3):90-95.
[25] YANG Renchao,FAN Aiping,HAN Zuozhen,et al.Lithofacies and origin of the Late Triassic muddy gravity-flow deposits in the Ordos Basin,central China[J].Marine and Petroleum Geology,2017,85:194-219.
[26] 李相博,陈启林,刘化清.鄂尔多斯盆地延长组3种沉积物重力流及其含油性[J].岩性油气藏,2010,22(3):16-22.
[27] SHANMUGAM G.Hanmugam.50 year of the turbidite paradigm(1950—1990):Deep-water processes and facies models-a critical perspective[J].Marine and Petroleum Geology,2000,17(2):285-342.
[28] 袁珍,李文厚,范萌萌,等.深水块状砂岩沉积特征及其成因机制探讨:以鄂尔多斯盆地东南缘上三叠统长6油层组为例[J].地质科技情报,2011,30(4):43-49.
[29] 陈全红,李文厚,高永祥,等.鄂尔多斯盆地上三叠统延长组深湖沉积与油气聚集意义[J].中国科学(D辑:地球科学),2007,37(S1):39-48.
[30] 鄢继华,陈世悦,宋国奇,等.三角洲前缘滑塌浊积岩形成过程初探[J].沉积学报,2004,22(4):573-579.
[31] 陈安清,陈红德,候明才,等.鄂尔多斯盆地中晚三叠世事件沉积对印支运动Ⅰ幕的指示[J].沉积学报,2011.85(10):1682-1690.
[32] 万天丰,朱鸿.中国大陆及邻区中生代新生代大地构造与环境变迁[J].现代地质,2002,16(2):107-120.
[33] 张文,李玉宏,张乔,等.鄂尔多斯盆地南部延长组时代划分及长73对印支Ⅰ幕的响应[J].地球科学,2017,42(9):1565-1577.
[34] 林世国,郑荣才,刘满仓.陆相碎屑震积岩形成机理及其研究意义[J].天然气地球科学,2013,24(1):78-85.
[35] 张文正,杨华,彭平安,等.晚三叠世火山活动对鄂尔多斯盆地长7优质烃源岩发育的影响[J].地球化学,2009,38(6):573-582.
[36] 刘池洋,赵俊峰,马艳萍,等.富烃拗陷特征及其形成研究现状与问题[J].地学前缘,2014,21(1):75-88.
[37] 左智峰,戚颖,葛小瑞,等.鄂尔多斯盆地晚三叠世火山物质对油气成藏条件的影响[J].兰州大学学报(自然科学版),2008,44(3):12-15.
[38] 王建强,刘池洋,李行,等.鄂尔多斯盆地南部延长组长7段凝灰岩形成时代、物质来源及其意义[J].沉积学报,2017,35(4):691-705.
[39] 杨华,田景春,王峰,等.鄂尔多斯盆地三叠纪延长组沉积期湖盆边界与底形与事件沉积研究[M].北京:地质出版社,2009.
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