辽河清水洼陷东营组高分辨率层序格架下沉积演化特征及有利区带预测
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摘要
根据地层基准面原理,通过对岩心、测井、地震资料的综合分析,将辽河清水洼陷东营组划分为4个3级地层旋回(层序):东三下、东三上、东二和东一层序;识别出3种类型的沉积体系:较深水湖—水下扇、浅湖—三角洲以及河流—泛滥平原体系;并在层序格架内分析了各旋回的沉积体系构成和储层砂体的发育情况。综合分析生、储、盖条件后认为,在纵向上,东三下和东三上旋回为研究区最有利的储集层段;在平面上,研究区的油气勘探应主要寻找洼陷中部的水下扇砂体和洼陷北部、西部与构造及断层相配合的辫状三角洲或扇三角洲前缘砂体,主要储层砂体类型为前缘水下分支河道砂体、河口坝和席状砂。
On the principle of base-level cycling and through the integrated analysis of cores, well logs and 3D seismic data, we divided the Dongying Formation (Ed) in Qingshui Depression into 4 third-order sequences, namely Lower Ed3, Upper Ed3, Ed2 and Ed1, and recognized three types of sedimentary systems, i.e. the semi-deep lacustrine subaqueous fan system, the shallow lacustrine-delta system and the alluvial-floodplain system. On the basis of the sequence identification and the sedimentary system recognition, we then studied the configuration of sedimentary systems and the development of reservoir sand-bodies in the sequential context. Finally, after evaluating the oil-generation, preservation and seal conditions, we concluded that, Lower Ed3 and Upper Ed3 sequences are the most favorable sections vertically, and exploration targets are subwater fans and delta front sands, mainly channel sands, mouth bars and sheet sands.
On the principle of base-level cycling and through the integrated analysis of cores, well logs and 3D seismic data, we divided the Dongying Formation (Ed) in Qingshui Depression into 4 third-order sequences, namely Lower Ed3, Upper Ed3, Ed2 and Ed1, and recognized three types of sedimentary systems, i.e. the semi-deep lacustrine subaqueous fan system, the shallow lacustrine-delta system and the alluvial-floodplain system. On the basis of the sequence identification and the sedimentary system recognition, we then studied the configuration of sedimentary systems and the development of reservoir sand-bodies in the sequential context. Finally, after evaluating the oil-generation, preservation and seal conditions, we concluded that, Lower Ed3 and Upper Ed3 sequences are the most favorable sections vertically, and exploration targets are subwater fans and delta front sands, mainly channel sands, mouth bars and sheet sands.
引文
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6单俊峰,陈振岩,回雪峰.辽河西部凹陷岩性油气藏展布特征及有利勘探区带选择[J].石油地质,2005,4:29-33[Shan Junfeng,Chen Zhenyan,Hui Xuefeng.Distribution features of lithologic oil-gas reservoirs and choice for favorable exploration zone in western sags of Liaohe Depression[J].Petroleum Geology,2005,4:29-33]
7翟光明,等.中国石油地质志卷3辽河油田[M].北京:石油工业出版社,1993:1-550[Zhai Guangming,et al.Petroleum Geology of China.Vol.3,Liaohe Oilfield[M].Beijing:Petroleum Industry Press,1993:1-550]
8孙洪斌,张凤莲.辽河断陷西部凹陷古近系砂岩储层[J].古地理学报,2002,4(3):83-91[Sun Hongbin,Zhang Fenglian.Sandstone reservoirs characteristics of the Paleogene in Western Depression of Li-aohe Rift[J].Journal of Palaeogeography,2002,4(3):83-91]
9单俊峰,陈振岩,回雪峰.辽河坳陷西部凹陷坡洼过渡带岩性油气藏形成条件[J].石油勘探与开发,2005,32(6):42-46[Shan Jun-feng,Chen Zhenyan,Hui Xuefeng.Forming conditions of lithologic reservoir in transition zone of western Liaohe Depression[J].PetroleumExploration and Development,2005,32(6):42-46]
10邓宏文,王宏亮.层序地层地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-183[Deng Hongwen,Wang Hongliang.Identification and correlation techniques of sequence stratigraphic base-levels and their application[J].Oil and Gas Geol-ogy,1996,17(3):177-183]
11鲁卫华,牛嘉玉,冯有良,等.辽河西部凹陷南段隐蔽油气藏的形成条件与分布规律[J].石油地质,2007,3:17-21[Lu Weihua,Niu Jiayu,Feng Youliang,et al.Accumulation conditions and distri-bution regularity of subtle oil-gas reservoirs in the southern segment of western sag of Liaohe Oilfield[J].Petroleum Geology,2007,3:17-21]
2郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分和研究意义[J].沉积学报,2001,19(2):2492255[Zheng Rongcai,Peng Jun,Wu Chaorong.Grade division of base level cycles of terrigenous basin and its implications[J].Acta Sedimentologica Sinica,2001,19(2):249-255]
3邓宏文,王红亮,王居峰,等.层序地层构成与层序控砂、控藏的自相似特征——以三角洲—浊积扇体系为例[J].石油与天然气地质,2004,25(5):491-495[Deng Hongwen,Wang Hongliang,Wang Jufeng,et al.Self-similarity of constitution of sequence stratigraphy and distribution of sand-bodies and lithologic reservoirs:taking delta-turbi-dite fan system as an example[J].Oil and Gas Geology,2004,25(5):491-495]
4淡卫东,张昌民,尹太举,等.川西白马庙气田上侏罗统蓬莱镇组高分辨率层序地层对比[J].沉积学报,2007,15(5):708-715[Dan Weidong,Zhang Changmin,Yin Taiju,et al.High resolution sequence stratigraphic correlation of Penglaizhen Formation,Upper Jurassic of Baimamiao Gas Field,Western Sichuan[J].Acta Sedimentologica Sin-ica,2007,15(5):708-715]
5郑荣才,尹世民,彭军.基准面旋回结构与叠加样式的沉积动力学分析[J].沉积学报,2000,18(3):369-375[Zheng Rongcai,Ying Shiming,Peng Jun.Sedimentary dynamic analysis of sequence structure and stacking pattern of base-level cycle[J].Acta Sedimento-logica Sinica,2000,18(3):369-375]
6单俊峰,陈振岩,回雪峰.辽河西部凹陷岩性油气藏展布特征及有利勘探区带选择[J].石油地质,2005,4:29-33[Shan Junfeng,Chen Zhenyan,Hui Xuefeng.Distribution features of lithologic oil-gas reservoirs and choice for favorable exploration zone in western sags of Liaohe Depression[J].Petroleum Geology,2005,4:29-33]
7翟光明,等.中国石油地质志卷3辽河油田[M].北京:石油工业出版社,1993:1-550[Zhai Guangming,et al.Petroleum Geology of China.Vol.3,Liaohe Oilfield[M].Beijing:Petroleum Industry Press,1993:1-550]
8孙洪斌,张凤莲.辽河断陷西部凹陷古近系砂岩储层[J].古地理学报,2002,4(3):83-91[Sun Hongbin,Zhang Fenglian.Sandstone reservoirs characteristics of the Paleogene in Western Depression of Li-aohe Rift[J].Journal of Palaeogeography,2002,4(3):83-91]
9单俊峰,陈振岩,回雪峰.辽河坳陷西部凹陷坡洼过渡带岩性油气藏形成条件[J].石油勘探与开发,2005,32(6):42-46[Shan Jun-feng,Chen Zhenyan,Hui Xuefeng.Forming conditions of lithologic reservoir in transition zone of western Liaohe Depression[J].PetroleumExploration and Development,2005,32(6):42-46]
10邓宏文,王宏亮.层序地层地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-183[Deng Hongwen,Wang Hongliang.Identification and correlation techniques of sequence stratigraphic base-levels and their application[J].Oil and Gas Geol-ogy,1996,17(3):177-183]
11鲁卫华,牛嘉玉,冯有良,等.辽河西部凹陷南段隐蔽油气藏的形成条件与分布规律[J].石油地质,2007,3:17-21[Lu Weihua,Niu Jiayu,Feng Youliang,et al.Accumulation conditions and distri-bution regularity of subtle oil-gas reservoirs in the southern segment of western sag of Liaohe Oilfield[J].Petroleum Geology,2007,3:17-21]
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