大川中地区须家河组二、四段地震相与沉积相研究
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摘要
四川盆地上三叠统须家河组油气勘探开始于20世纪40年代,其中须二段、须四段是主要探目的层段,也是盆地周边地区寻找新气源最有利层位之一。依据地震地层学方法和理论,结合钻井与测井资料,将大川中地区须家河组划分成7个地震层序边界,分别为SB1—SB7,与之对应6个最大湖泛面,分别为MFS1—MFS6,并对层序界面的地震反射特征进行了总结。利用地震反射内部结构、外部形态和反射波终止类型,在大川中地区须家河组须二段与四段内共识别出平行—亚平行、前积、丘状、透镜状及发散状地震反射特征等5种地震相,并对18条二维地震测线进行了剖面地震相的综合解释,编制了须二段与四段的地震相平面分布图。通过地震相与沉积相的转换,分别划分出冲积扇、扇三角洲、辫状河三角洲以及湖泊等沉积体系,编制了大川中地区须家河组二段与四段沉积相平面图,对大川中地区须家河组构造格局的演化规律进行了分析。
Oil and gas exploration started in the 1940s in the Xujiahe Formation,Upper Triassic,Sichuan Basin,of which the 2nd,4th and 6th members are not only the major targets,but also the most favorable horizons in search for new gas sources.According to the seismic and sedimentological studies,in combination with drilling data,there are seven seismic sequence boundaries in the Xujiahe Formation in the Great Central Sichuan area,namely SB1-SB7,corresponding to six large lake flooding surfaces,MFS1-MFS6 respectively.In this paper,the seismic reflection features of the sequence boundaries are summarized.Taking the advantage of seismic reflection internal structure,external form and reflection termination type,five kinds of seismic facies were identified and described,including the parallel,sub-parallel,foreset,hummocky,lenticular and divergent shaped seismic facies.Interpretation of seismic facies and sedimentary facies for 18 2D seismic sections was made and the distribution map of seismic facies for the 2nd and 4th members of the Xujiahe Formation compiled.Through the conversion of seismic facies to sedimentary facies,the Xujiahe Formation could be divided into several sedimentary systems,such as alluvial fan,fan delta,braided river delta and lakes.Based on the data,sedimentary facies maps of the 2nd and 4th members were compiled,and the history of tectonic evolution of the great central Sichuan area discussed.
Oil and gas exploration started in the 1940s in the Xujiahe Formation,Upper Triassic,Sichuan Basin,of which the 2nd,4th and 6th members are not only the major targets,but also the most favorable horizons in search for new gas sources.According to the seismic and sedimentological studies,in combination with drilling data,there are seven seismic sequence boundaries in the Xujiahe Formation in the Great Central Sichuan area,namely SB1-SB7,corresponding to six large lake flooding surfaces,MFS1-MFS6 respectively.In this paper,the seismic reflection features of the sequence boundaries are summarized.Taking the advantage of seismic reflection internal structure,external form and reflection termination type,five kinds of seismic facies were identified and described,including the parallel,sub-parallel,foreset,hummocky,lenticular and divergent shaped seismic facies.Interpretation of seismic facies and sedimentary facies for 18 2D seismic sections was made and the distribution map of seismic facies for the 2nd and 4th members of the Xujiahe Formation compiled.Through the conversion of seismic facies to sedimentary facies,the Xujiahe Formation could be divided into several sedimentary systems,such as alluvial fan,fan delta,braided river delta and lakes.Based on the data,sedimentary facies maps of the 2nd and 4th members were compiled,and the history of tectonic evolution of the great central Sichuan area discussed.
引文
[1]郑荣才,戴朝成,罗清林,等.四川类前陆盆地上三叠统须家河组沉积体系[J].天然气工业,2011,31(9):16-24.
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[8]张虹,刘殊.再论川西坳陷须家河组二段气藏地震相特征[J].石油物探,2010,49(3):265-279.
[9]金惠,魏国齐,杨威,等.安岳—潼南地区须家河组地震相模式及其地质意义[J].天然气地球科学,2009,20(4):544-548.
[10]赵爽,高倩,谯述容.川西DY地区三叠系须家河组二段地震相分析与沉积相预测[J].石油地球物理勘探,2009,44(3):341-346.
[11]苏锦义,刘殊.川西坳陷须家河组二段气藏地震相特征研究[J].石油物探,2008,47(2):167-171.
[12]姜辉,于兴河,李庆明,等.Muglad盆地Nugara坳陷东凹Darfur群地震层序格架和地震相[J].油气地质与采收率,2006,13(5):18-21.
[13]周建林.东营凹陷利津洼陷北部沙三段地震相类型及其展布特征研究[J].石油天然气学报(江汉石油学院学报),2010,32(4):67-70.
[14]张琴,朱筱敏,张满郎.准噶尔盆地阜东斜坡区侏罗系地震相研究[J].石油大学学报(自然科学版),2001,25(1):72-76.
[15]张喜林,朱筱敏,杨俊生.苏北盆地高邮凹陷古近系戴南组地震相研究[J].西安石油大学学报(自然科学版),2005,20(3):44-47.
[16]高胜利,任战利,周义军,等.河套地区呼和坳陷第四系更新统地震相与沉积相[J].古地理学报,2007,9(1):87-96.
[17]施泽进,田亚铭,韩小俊,等.川东南地区下古生界地震相特征及意义[J].石油实验地质,2009,31(1):31-39.
[18]陈学海,卢双舫,薛海涛,等.海拉尔盆地呼和湖凹陷白垩系地震相[J].石油勘探与开发,2011,38(3):321-327.
[19]董艳蕾,朱筱敏,李德江,等.渤海湾盆地辽东湾地区古近系地震相研究[J].沉积学报,2007,25(4):554-563.
[20]郑荣才,朱如凯,戴朝成,等.川东北类前陆盆地须家河组盆—山耦合过程的沉积—层序特征[J].地质学报,2008,82(8):1 078-1 087.
[21]郑荣才,戴朝成,朱如凯,等.四川类前陆盆地须家河组层序—岩相古地理特征[J].地质论评,2009,55(4):484-495.
[2]罗启后.对四川盆地上三叠统沉积相的一些认识和思考[J].天然气工业,2011,31(9):12-15.
[3]库丽曼,刘树根,张长俊,等.川中地区上三叠统须家河组二段和四段沉积相[J].油气地质与采收率,2007,14(2):35-37.
[4]刘娟,田景春,张翔,等.川南麻柳场—大塔场地区上三叠统须家河组沉积相研究[J].岩性油气藏,2009,21(3):70-75.
[5]胡明毅,李士祥,魏国齐,等.川西前陆盆地上三叠统须家河组沉积体系及演化特征[J].石油天然气学报(江汉石油学院学报),2008,30(5):5-10.
[6]李熙喆.川西南地区上三叠统须家河组沉积相特征[J].天然气工业,2008,28(2):54-57.
[7]蒋裕强,陶艳忠,沈妍斐,等.对大川中地区上三叠统须家河组二、四、六段砂岩沉积相的再认识[J].天然气工业,2011,31(9):39-50.
[8]张虹,刘殊.再论川西坳陷须家河组二段气藏地震相特征[J].石油物探,2010,49(3):265-279.
[9]金惠,魏国齐,杨威,等.安岳—潼南地区须家河组地震相模式及其地质意义[J].天然气地球科学,2009,20(4):544-548.
[10]赵爽,高倩,谯述容.川西DY地区三叠系须家河组二段地震相分析与沉积相预测[J].石油地球物理勘探,2009,44(3):341-346.
[11]苏锦义,刘殊.川西坳陷须家河组二段气藏地震相特征研究[J].石油物探,2008,47(2):167-171.
[12]姜辉,于兴河,李庆明,等.Muglad盆地Nugara坳陷东凹Darfur群地震层序格架和地震相[J].油气地质与采收率,2006,13(5):18-21.
[13]周建林.东营凹陷利津洼陷北部沙三段地震相类型及其展布特征研究[J].石油天然气学报(江汉石油学院学报),2010,32(4):67-70.
[14]张琴,朱筱敏,张满郎.准噶尔盆地阜东斜坡区侏罗系地震相研究[J].石油大学学报(自然科学版),2001,25(1):72-76.
[15]张喜林,朱筱敏,杨俊生.苏北盆地高邮凹陷古近系戴南组地震相研究[J].西安石油大学学报(自然科学版),2005,20(3):44-47.
[16]高胜利,任战利,周义军,等.河套地区呼和坳陷第四系更新统地震相与沉积相[J].古地理学报,2007,9(1):87-96.
[17]施泽进,田亚铭,韩小俊,等.川东南地区下古生界地震相特征及意义[J].石油实验地质,2009,31(1):31-39.
[18]陈学海,卢双舫,薛海涛,等.海拉尔盆地呼和湖凹陷白垩系地震相[J].石油勘探与开发,2011,38(3):321-327.
[19]董艳蕾,朱筱敏,李德江,等.渤海湾盆地辽东湾地区古近系地震相研究[J].沉积学报,2007,25(4):554-563.
[20]郑荣才,朱如凯,戴朝成,等.川东北类前陆盆地须家河组盆—山耦合过程的沉积—层序特征[J].地质学报,2008,82(8):1 078-1 087.
[21]郑荣才,戴朝成,朱如凯,等.四川类前陆盆地须家河组层序—岩相古地理特征[J].地质论评,2009,55(4):484-495.
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