徐家围子断陷下白垩统营城组四段层序地层与沉积体系发育特征
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摘要
徐家围子断陷下白垩统营城组四段是裂谷盆地火山喷发背景下发育的粗碎屑岩地层,是天然气储层。利用该区钻井、岩芯、测井和高分辨率三维地震资料,按照层序地层的原理对营四段层序地层进行了分析,以岩相分析为基础确定了营四段沉积体系类型。研究表明徐家围子断陷营四段发育营四下层序(Sq1)和营四上层序(Sq2)两个三级层序。营四下层序发育在火山喷发后形成的孤立的3个火山湖盆之中;营四上层序(Sq2)发育在湖盆整体下沉形成的一个相对完整的湖盆之中。营四下层序发育时期湖盆分割性强、湖泊深浅悬殊,主要发育近物源的冲积扇、扇三角洲沉积体系。以发育粗砾岩,中砾岩相组合为特征。营四上层序发育在一个相对完整的大湖盆之中,发育了规模较大的北部物源辫状河三角洲体系和南部物源河流三角洲沉积体系。以发育中砾岩、细砾岩和粗砂岩相组合为特征。辫状河三角洲沉积体系以发育厚度较大,分布面积较广的砾质辫状平原为特征。河流三角洲以发育近源砾质曲流河为特征。由于湖盆古地貌背景由营四下层序沉积时期的分割性强小湖盆演化为营四上层序沉积时期的相对完整的大湖盆,主要沉积体系也由营四下层序的冲积扇和扇三角州,演变为营四上层序的辫状河三角洲和河流三角洲体系。三角洲前缘相储层物性好是天然气的优质储层。
The 4th member of Yingcheng Formation of lower Cretaceous is a series of stratigraphy of coarse clastic rock deposited in a background of volcano erupting of rift basin of Xujiaweizi faulted depression.It is the reservoir for natural gas pool.Using 3D seismic data of high resolution,cores,drilling logs and log curves,the framework of sequence stratigraphy and depositional systems of the 4th member were established by this paper based on sequence principle and the way of lithofacies analysis,respectively.Two third-order sequences were identified in the fourth member of Yingcheng Formation of lower Cretaceous in Xujiaweizi rifted depression.The sequence 1of lower fourth member(Sq1) of Yingcheng Formation was deposited in three geographically isolated volcano lakes formed by volcano erupting;the sequence 2 of the upper fourth member(Sq2) of Yingcheng Formation was deposited in a relative whole lake,because of the depression subsidence.Lakes during Sq1 period were well divided,in great disparity of depth,and mostly developed sedimentary systems of alluvial fan and fan delta being adjacent to the uplifts and characterized by lithofacies associations of cobble conglomerate and pebble conglomerate.Sq2 was formed in a relative whole lake,and developed a large scale sedimentary system of braided delta in the northern part of the depression and a sedimentary system of fluvial delta in the southern part of the depression.The two kinds of sedimentary system are characterized by lithofacies assemblages of pebble conglomerate,granular conglomerate,and coarse sandstone.The depositional system of braided delta is characterized by braided delta plain,composed of conglomerates,the thickness of which is great and the area of which is large.The depositional system of fluvial delta is characterized by proximal meandering river of conglomerate.Because of evolution of paleogeomorphology background from three small isolated lakes during Sq1 period to a relative whole lake in Sq2,depositional systems of alluvial fan and fan delta during Sq1 period changed to depositional system of braided river delta and depositional system of fluvial delta during Sq2 period.The front of delta is good reservoirs favorable for nature gas.
The 4th member of Yingcheng Formation of lower Cretaceous is a series of stratigraphy of coarse clastic rock deposited in a background of volcano erupting of rift basin of Xujiaweizi faulted depression.It is the reservoir for natural gas pool.Using 3D seismic data of high resolution,cores,drilling logs and log curves,the framework of sequence stratigraphy and depositional systems of the 4th member were established by this paper based on sequence principle and the way of lithofacies analysis,respectively.Two third-order sequences were identified in the fourth member of Yingcheng Formation of lower Cretaceous in Xujiaweizi rifted depression.The sequence 1of lower fourth member(Sq1) of Yingcheng Formation was deposited in three geographically isolated volcano lakes formed by volcano erupting;the sequence 2 of the upper fourth member(Sq2) of Yingcheng Formation was deposited in a relative whole lake,because of the depression subsidence.Lakes during Sq1 period were well divided,in great disparity of depth,and mostly developed sedimentary systems of alluvial fan and fan delta being adjacent to the uplifts and characterized by lithofacies associations of cobble conglomerate and pebble conglomerate.Sq2 was formed in a relative whole lake,and developed a large scale sedimentary system of braided delta in the northern part of the depression and a sedimentary system of fluvial delta in the southern part of the depression.The two kinds of sedimentary system are characterized by lithofacies assemblages of pebble conglomerate,granular conglomerate,and coarse sandstone.The depositional system of braided delta is characterized by braided delta plain,composed of conglomerates,the thickness of which is great and the area of which is large.The depositional system of fluvial delta is characterized by proximal meandering river of conglomerate.Because of evolution of paleogeomorphology background from three small isolated lakes during Sq1 period to a relative whole lake in Sq2,depositional systems of alluvial fan and fan delta during Sq1 period changed to depositional system of braided river delta and depositional system of fluvial delta during Sq2 period.The front of delta is good reservoirs favorable for nature gas.
引文
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5 Van Wagoner J C,Mitchun R M,Campion K M,et al.Siliciclastic se-quence stratigraphy in well,core and outcrops and outcrops-concept forhigh-resolution correlation of times and facies[J].AAPG Methods inExploration Series,1990,(7):1-55
6刘宝珺,曾允孚.沉积岩石学[M].北京:地质出版社,1980[LiuBaojun,Zeng Yunfu.Sedimentology[M].Beijing:Geological Pub-lishing House,1980]
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8王平在,辛仁臣.松辽盆地北部徐家围子断陷沉积体系及其演化规律[J].大庆石油学院学报,2001,25(3):36-4[Wang Pingzai,Xin Rencheng.Depositional system and its evolution of Xujiaweizi faultbasin[J].Journal of Daqing Petroleum Institute,2001,25(3):36-40]
9 Nemec W N,Steel R J.What Is a Fan Delta and How Do We Recog-nize It[M]∥Nemec W N,Steel R J,eds.Sedimentology and TectonicSettings.Blackie and Son,1988:3-13
10 Mcpherson J G,Shanmugam G,Moiola R J.Fan Delta:conceptualproblems[M]∥Nemec W N,Steel R J,eds.Sedimentology and Tec-tonic Settings.Blackie and Son,1988:14-22
11 Kostic B,Aiqner T.Sedimentary architecture and 3D Ground-pene-trating radar analysis of gravelly meandering river deposits(NeckarValley,SW Gaemany)[J].Sedimentology,2007,(54):789-808
12 Salcher B C,Wagreich M.Climate and tectonic controls on Pleisto-cene sequence development and river evolution in the Southern ViennaBasin(Austria)[J].Quaternary International,2009:1-14
13冯有良.断陷湖盆沟谷及构造坡折对砂体的控制作用[J].石油学报,2006,27(1):13-16[Feng Youliang.Control of valley andtectonic slope-break zone on sand bodies in rift-subsidence basin[J].Acta Petrolei Sinica,2006,27(1):13-16]
14程日辉,王璞君,刘万洙,等.徐家围子断陷火山岩充填的层序地层[J].吉林大学学报:地球科学版,2005,35(4):469-474[Cheng Rihui,Wang Pujun,Liu Wanzhu,et al.Sequence stratigra-phy with fills of volcanic rocks in Xujiaweizi Faulted depression ofSongliao Basin,Northeast China[J].Journal of Jilin University:Earth Science Edition,2005,35(4):469-474]
15冯有良,徐秀生.同沉积构造坡折带对岩性油气藏富集带的控制作用———以渤海湾盆地古近系为例[J].石油勘探与开发,2006,33(1):22-25[Feng Youliang,Xu Xiusheng.Syndepositional struc-tural slope-break zone controls on lithologic reservoirs:A case fromPaleogene Bohai Bay Basin[J].Petroleum Exploration and Develop-ment,2006,33(1):22-25]
16朱筱敏,张义娜,杨俊生,等.准噶尔盆地侏罗系辫状河三角洲沉积特征[J].石油与天然气地质,2008,29(4):244-251[ZhuXiaomin,Zhang Yina,Yang Junsheng,et al.Sedimentary character-istics of the shallow Jurassic braided river delta,Junggar Basin[J].Oil and Gas Geology,2008,(29):244-251]
17杨东明,姜在兴,李葵英,等.济阳坳陷馆陶组辫状河三角洲—浅水湖泊沉积体系[J].西安石油学报:自然科学版,2004,19(6):15-21[Yang Dongming,Jiang Zaixing,Li Kuiying,et al.Brai-ded river delta-shallow lacustrine depositional system of Guantao For-mation in Jiyang depression[J].Journal of Xi'an Shiyou University:Natural Science Edition,2004,29(16):15-21]
2 Umazano A M,Bellosi E S,Visconti G,et al.Mechanisms of aggrada-tion in fluvial systems influenced by explosive volcanism:An examplefrom the upper Cretaceous Barreal Formation,San Jorge Basin,Argen-tina[J].Sedimentary Geology,2008,(203):213-228
3门广田,庞智英,施尚明.徐深气田兴城地区营四段的沉积特征及成因[J].大庆石油学院学报,2007,31(3):18-20[Men Guang-tian,Pang Ziying,Shi Shangming.Sedimentary characteristics andcause of conglomerate in Ying-4 segment of Xushen gas field[J].Jour-nal of Daqing Petroleum Institute,2007,31(3):18-20]
4文慧俭,舒萍,范传闻,等.徐深气田深层砾岩储层储集空间类型及控制因素[J].大庆石油学院学报,2008,32(3):101-104[Wen Huijian,Shu Ping,Fan Chuanwen et al.Reservoir space typeand control factors of the deep conglomerate reservoir in Xusheng gasfield[J].Journal of Daqing Petroleum Institue,2008,32(3):101-104]
5 Van Wagoner J C,Mitchun R M,Campion K M,et al.Siliciclastic se-quence stratigraphy in well,core and outcrops and outcrops-concept forhigh-resolution correlation of times and facies[J].AAPG Methods inExploration Series,1990,(7):1-55
6刘宝珺,曾允孚.沉积岩石学[M].北京:地质出版社,1980[LiuBaojun,Zeng Yunfu.Sedimentology[M].Beijing:Geological Pub-lishing House,1980]
7孙海雷,柳成志,刘华晔.徐家围子断陷兴城地区营四段储层沉积特征研究[J].上海地质,2007,(3):5-9[Sun Hailei,LiuChengzhi,Liu Huaye.Research on reservoir depositional character ofXujiaweizi fault depression forth fragment of Yingcheng Formation inXingcheng development region[J].Shanghai Geology,2007,(3):5-9]
8王平在,辛仁臣.松辽盆地北部徐家围子断陷沉积体系及其演化规律[J].大庆石油学院学报,2001,25(3):36-4[Wang Pingzai,Xin Rencheng.Depositional system and its evolution of Xujiaweizi faultbasin[J].Journal of Daqing Petroleum Institute,2001,25(3):36-40]
9 Nemec W N,Steel R J.What Is a Fan Delta and How Do We Recog-nize It[M]∥Nemec W N,Steel R J,eds.Sedimentology and TectonicSettings.Blackie and Son,1988:3-13
10 Mcpherson J G,Shanmugam G,Moiola R J.Fan Delta:conceptualproblems[M]∥Nemec W N,Steel R J,eds.Sedimentology and Tec-tonic Settings.Blackie and Son,1988:14-22
11 Kostic B,Aiqner T.Sedimentary architecture and 3D Ground-pene-trating radar analysis of gravelly meandering river deposits(NeckarValley,SW Gaemany)[J].Sedimentology,2007,(54):789-808
12 Salcher B C,Wagreich M.Climate and tectonic controls on Pleisto-cene sequence development and river evolution in the Southern ViennaBasin(Austria)[J].Quaternary International,2009:1-14
13冯有良.断陷湖盆沟谷及构造坡折对砂体的控制作用[J].石油学报,2006,27(1):13-16[Feng Youliang.Control of valley andtectonic slope-break zone on sand bodies in rift-subsidence basin[J].Acta Petrolei Sinica,2006,27(1):13-16]
14程日辉,王璞君,刘万洙,等.徐家围子断陷火山岩充填的层序地层[J].吉林大学学报:地球科学版,2005,35(4):469-474[Cheng Rihui,Wang Pujun,Liu Wanzhu,et al.Sequence stratigra-phy with fills of volcanic rocks in Xujiaweizi Faulted depression ofSongliao Basin,Northeast China[J].Journal of Jilin University:Earth Science Edition,2005,35(4):469-474]
15冯有良,徐秀生.同沉积构造坡折带对岩性油气藏富集带的控制作用———以渤海湾盆地古近系为例[J].石油勘探与开发,2006,33(1):22-25[Feng Youliang,Xu Xiusheng.Syndepositional struc-tural slope-break zone controls on lithologic reservoirs:A case fromPaleogene Bohai Bay Basin[J].Petroleum Exploration and Develop-ment,2006,33(1):22-25]
16朱筱敏,张义娜,杨俊生,等.准噶尔盆地侏罗系辫状河三角洲沉积特征[J].石油与天然气地质,2008,29(4):244-251[ZhuXiaomin,Zhang Yina,Yang Junsheng,et al.Sedimentary character-istics of the shallow Jurassic braided river delta,Junggar Basin[J].Oil and Gas Geology,2008,(29):244-251]
17杨东明,姜在兴,李葵英,等.济阳坳陷馆陶组辫状河三角洲—浅水湖泊沉积体系[J].西安石油学报:自然科学版,2004,19(6):15-21[Yang Dongming,Jiang Zaixing,Li Kuiying,et al.Brai-ded river delta-shallow lacustrine depositional system of Guantao For-mation in Jiyang depression[J].Journal of Xi'an Shiyou University:Natural Science Edition,2004,29(16):15-21]
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