辽河盆地滩海地区东营组沉积特征与演化
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摘要
综合岩心、钻井、地震等资料,运用现代沉积学的思路和方法,对辽河盆地滩海地区古近系东营组沉积体系特征进行了分析,认为在东营组沉积时期滩海地区共发育扇三角洲、辫状河三角洲、三角洲、湖泊、滩坝以及湖底扇6种沉积类型。沉积体系的时空分布和演化特征受控于构造背景和湖平面变化。东营组三段沉积时期盆地沉降幅度大,为湖盆扩张早期,研究区沉积相以扇三角洲,辫状河三角洲、湖底扇为主;东营组二段沉积时期为湖盆扩张时期,但构造活动减弱,湖盆变浅,研究区沉积相以辫状河三角洲及滨浅湖-滩坝为主;东营组一段沉积时期为湖盆收缩期,除局部深凹为滨浅湖-滩坝沉积外,广泛发育辫状河三角洲沉积。
An analysis was carried out on the sedimentary features of the Paleogene Dongying Formation in the tidal area of Liaohe Basin based on core,drilling and seismic data as well as modern sedimentology concepts and methods.Six sedimentation types are identified in the Dongying Formation in the tidal area,namely fan delta,braided delta,delta,lake,beach bar and sublacustrine fan.The temporal and spatial distribution as well as the evolutionary features of the sedimentary system in the Formation was controlled by the structural background and lake level variation.The third member of the Formation was deposited in the early stage of lake expansion when the basin was experiencing the most intense subsidence.The sedimentary facies are dominated by fan delta,braided delta and sublacustrine fan.The second member was formed during the lake expansion when the tectonic movement weakened and the lake basin was shallower.Sedimentary facies during the time were mainly braided delta and shallow lake-beach bar.The first member was deposited during lake shrinking and braided delta dominated except for shallow lake-beach bar in local deep sags.
An analysis was carried out on the sedimentary features of the Paleogene Dongying Formation in the tidal area of Liaohe Basin based on core,drilling and seismic data as well as modern sedimentology concepts and methods.Six sedimentation types are identified in the Dongying Formation in the tidal area,namely fan delta,braided delta,delta,lake,beach bar and sublacustrine fan.The temporal and spatial distribution as well as the evolutionary features of the sedimentary system in the Formation was controlled by the structural background and lake level variation.The third member of the Formation was deposited in the early stage of lake expansion when the basin was experiencing the most intense subsidence.The sedimentary facies are dominated by fan delta,braided delta and sublacustrine fan.The second member was formed during the lake expansion when the tectonic movement weakened and the lake basin was shallower.Sedimentary facies during the time were mainly braided delta and shallow lake-beach bar.The first member was deposited during lake shrinking and braided delta dominated except for shallow lake-beach bar in local deep sags.
引文
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20蔡李梅,陈红汉,李纯泉,等.济阳坳陷东营凹陷沙三中亚段流体包裹体古流体势场恢复[J].石油与天然气地质,2009,30(1):17～25
2刘永强,刘小龙.冀中坳陷饶阳凹陷留西地区沙三上亚段层序地层与隐蔽油藏[J].石油与天然气地质,2009,30(6):747～753
3慕德梁,孟卫工,李成,等.断陷盆地陡坡带构造样式与油气聚集——以渤海湾盆地辽河坳陷西部凹陷陡坡带为例[J].石油与天然气地质,2009,30(5):635～642
4徐长贵,朱秀香,史翠娥,等.辽东湾坳陷古近系东营组泥岩对油气藏分布的控制作用[J].石油与天然气地质,2009,30(4):431～437
5廖兴明,姚继峰,于天欣,等.辽河盆地构造演化与油气[M].北京:石油工业出版社,1996.12～45
6朱筱敏,王贵文,孙洪斌,等.辽河滩海地区古近系层序地层学研究[M].北京:石油工业出版社,2000.5～6
7陈欢庆,朱筱敏,董艳蕾,等.深水断陷盆地层序地层分析与岩性-地层油气藏预测——以中国南海C盆地深水区古近系T组为例[J].石油与天然气地质,2009,30(5):626～634
8赵澄林.沉积岩石学[M].北京:石油工业出版社,2000.275～278
9刘延莉,邱春光,邓宏文,等.冀东南堡凹陷古近系东营组构造对扇三角洲的控制作用[J].石油与天然气地质,2008,29(1):96～101
10姜在兴,向树安,陈秀艳,等.淀南地区古近系沙河街组层序地层模式[J].沉积学报,2009,27(5):931～938
11王良忱,张金亮.沉积环境与沉积相[M].北京:石油工业出版社,1996.145～146
12Galloway WE,Hobday D K.Terrigenous clastic depositional systems(2nd Edition)[M].NewYork:Springer-Verlag,1996.6-326
13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,2001.4～7
14袁红军,陷博兴洼陷滨浅湖相滩坝砂岩储层预测[J].石油与天然气地质,2007,28(4):497～508
15McPherson J C,Shanmugam G,Moiola R J.Fan-deltas and braid deltas:varieties of coarse～grained deltas[J].Geological Society of America Bulletin,1987,99(3):331-340
16吴小红,吕修详,周心怀,等.黄河口凹陷浅水三角洲沉积特征及其油气勘探意义[J].石油与天然气地质,2010,31(2):165～172
17吴光华,王红亮,林会喜,等.渤海湾盆地埕岛地区东营组沉积特征及其油气地质意义[J].石油与天然气地质,2009,30(1):33～40
18姚光庆,陈红汉,何仕斌.渤中地区第三系储层地质特征研究[J].中国海上油气(地质),2001,15(4):249～253
19胡望水,卫拥军,张自其.辽河盆地构造样式与圈闭发育特征[J].新疆石油地质,2002,23(3):197～200
20蔡李梅,陈红汉,李纯泉,等.济阳坳陷东营凹陷沙三中亚段流体包裹体古流体势场恢复[J].石油与天然气地质,2009,30(1):17～25
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