宋站地区达深2井区沙河子组层序划分与沉积相分析
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摘要
松辽盆地徐家围子断陷北部宋站地区深层油气勘探潜力巨大,可作为深部勘探的备选领域。以宋站地区达深2井区沙河子组为研究对象,综合运用岩心、测井与录井以及三维地震等资料,进行了层序地层划分与沉积相类型分析,进一步分析了沉积演化特征,建立了沉积相模式。研究结果表明,达深2井区沙河子组可划分为1个二级层序和4个三级层序,在三级层序内部主要发育辫状河三角洲、扇三角洲、湖泊、火山碎屑岩等4种沉积相类型,沉积相带东西分异明显。宋站地区达深2井区沙河子组沉积过程受到盆地边界断裂的控制,在徐西控陷断裂的持续活动下,沉积范围不断扩大,扇三角洲向徐西断裂带迁移,辫状河三角洲向断陷东部扩展,浅湖沉积在Sq4时期范围达到最大,表明沙河子组具有典型的断陷湖盆沉积特征。本文研究成果可为该地区及类似小型断陷湖盆的油气勘探提供一定的地质依据。
The deep oil and gas exploration potential of the Songzhan region in the northern part of the Xujiaweizi fault depression of Songliao basin is huge and can be used as an alternative field for deep exploration.In this paper,the Shahezi Formation in Dashen2 wellblock of Songzhan region is studied.By integrating data of core,well logging,mud logging and 3Dseismic survey,the sequence stratigraphy division and types of sedimentary facies analysis are carried out,and the characteristics of sedimentary evolution were further analyzed and the sedimentary facies model was established.The results show that the Shahezi Formation in the Dashen2 wellblock can be divided into one second-order sequence and four third-order sequences.There are mainly four types of sedimentary facies developed within the thirdorder sequence,including braided delta,fan delta,lacustrine and volcanic rock.The sedimentary facies are obviously distinct from east to west.The sedimentary process of the Shahezi Formation in the Dashen2 wellblock of Songzhan region is controlled by the boundary fault of the basin.Under the continuous activity of the Xuxi boundary fault,the sedimentation range is expanding,the fan delta migrates to the Xuxi fault zone,the braided delta extends to the eastern part of the fault depression,and the sedimentation range of shallow lacustrine reaches the maximum in the Sq4 period,which indicates that the Shahezi Formation is characterized by typical fault basin sediment.The research results in this paper can provide a certain geological basis for oil and gas exploration in this region and similar small-scale fault basins.
The deep oil and gas exploration potential of the Songzhan region in the northern part of the Xujiaweizi fault depression of Songliao basin is huge and can be used as an alternative field for deep exploration.In this paper,the Shahezi Formation in Dashen2 wellblock of Songzhan region is studied.By integrating data of core,well logging,mud logging and 3Dseismic survey,the sequence stratigraphy division and types of sedimentary facies analysis are carried out,and the characteristics of sedimentary evolution were further analyzed and the sedimentary facies model was established.The results show that the Shahezi Formation in the Dashen2 wellblock can be divided into one second-order sequence and four third-order sequences.There are mainly four types of sedimentary facies developed within the thirdorder sequence,including braided delta,fan delta,lacustrine and volcanic rock.The sedimentary facies are obviously distinct from east to west.The sedimentary process of the Shahezi Formation in the Dashen2 wellblock of Songzhan region is controlled by the boundary fault of the basin.Under the continuous activity of the Xuxi boundary fault,the sedimentation range is expanding,the fan delta migrates to the Xuxi fault zone,the braided delta extends to the eastern part of the fault depression,and the sedimentation range of shallow lacustrine reaches the maximum in the Sq4 period,which indicates that the Shahezi Formation is characterized by typical fault basin sediment.The research results in this paper can provide a certain geological basis for oil and gas exploration in this region and similar small-scale fault basins.
引文
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[14]徐怀大.层序地层学理论用于我国断陷盆地分析中的问题[J].石油与天然气地质,1991,12(1):52-57.XU Huaida.Problems in analysis of faulted basins of China based on sequence stratigraphic theory[J].Oil&Gas Geology,1991,12(1):52-57.
[15]冯有良,李思田,解习农.陆相断陷盆地层序形成动力学及层序地层模式[J].地学前缘,2000,7(3):119-132.FENG Youliang,LI Sitian,XIE Xinong.Dynamics of sequence generation and sequence stratigraphic model in continental rift-subsidence basin[J].Earth Science Frontiers,2000,7(3):119-132.
[16]邱桂强.陆相断陷盆地高精度层序地层研究现状与思路[J].油气地质与采收率,2005,12(3):1-4,8.QIU Guiqiang.Current research situation and thinking on high accuracy sequence stratigraphy in the terrestrial rift basin[J].Petroleum Geology and Recovery Efficiency,2005,12(3):1-4,8.
[17]冯有良,周海民,李思田,等.陆相断陷盆地层序类型与构造特征[J].地质论评,2004,50(1):43-49.FENG Youliang,ZHOU Haimin,LI Sitian,et al.Sequence types and structural characteristics in continental rift-subsidence basins[J].Earth Science Frontiers,2004,50(1):43-49.
[18]赵文智,方杰.不同类型断陷湖盆岩性-地层油气藏油气富集规律:以冀中坳陷和二连盆地岩性-地层油气藏对比为例[J].石油勘探与开发,2007,34(2):129-134.ZHAO Wenzhi,FANG Jie.Petroleum enrichment rules in lithologic and stratigraphic pools in different faulted basins:an example from the correlation of lithologic and stratigraphic pools in Jizhong Depression and in Erlian Basin[J].Petroleum Exploration and Development,2007,34(2):129-134.
[19]谢晓安,周卓明.松辽盆地深层天然气勘探实践与勘探领域[J].石油与天然气地质,2008,29(1):113-119.XIE Xiaoan,ZHOU Zhuoming.Exploration practices and directions for deep natural gas in the Songliao Basin[J].Oil&Gas Geology,2008,29(1):113-119.
[20]康南昌,曹永忠,张秀顽,等.断陷盆地的后备勘探领域:深陷带[J].中国石油勘探,2013,18(1):29-34.KANG Nanchang,CAO Yongzhong,ZHANG Xiuwan,et al.Stand-by exploration field of rift basin:deep sag belt[J].China Petroleum Exploration,2013,18(1):29-34.
[21]信荃麟,朱筱敏,郑清,等.渤海湾盆地下第三系断陷湖盆沉积体系与油气分布[J].中国石油大学学报(自然科学版),1989,13(5):11-17.XIN Quanlin,ZHU Xiaomin,ZHENG Qing,et al.Depositional system and oil-gas occurrences of tertiary down-faulted lacustrine basins in Bohai Basin of China[J].Journal of the University of Petroleum,China,1989,13(5):11-17.
[22]付兆辉,张在振,李德纯,等.渤海湾盆地堤北凹陷古近系沉积体系分析与油气成藏[J].沉积学报,2009,27(1):26-31.FU Zhaohui,ZHANG Zaizheng,LI Dechun,et al.Analysis on sedimentary systems and hydrocarbon accumulation of Palaeogene,Chengbei Sag[J].Acta Sedimentologica Sinica,2009,27(1):26-31.
[23]王民,孙业峰,王文广,等.松辽盆地北部徐家围子断陷深层烃源岩生气特征及天然气资源潜力[J].天然气地球科学,2014,25(7):1011-1018.WANG Min,SUN Yefeng,WANG Wenguang,et al.Gas generation characteristics and resource potential of the deep source rock in Xujiaweizi Fault Depression,Northern Songliao Basin[J].Natural Gas Geoscience,2014,25(7):1011-1018.
[24]赵伟,邱隆伟,姜在兴,等.断陷湖盆萎缩期浅水三角洲沉积演化与沉积模式:以东营凹陷牛庄洼陷古近系沙三段上亚段和沙二段为例[J].地质学报,2011,85(6):1019-1027.ZHAO Wei,QIU Longwei,JIANG Zaixing,et al.Depositional evolution and model of shallow water delta in the rifting lacustrine basins during the shrinking stage:a case study of the Third Member and Second Member of Paleogene Shahejie Formation in the Niuzhuang Subsag,Dongying Sag[J].Acta Geologica Sinica,2011,85(6):1019-1027.
[2]潘春孚,纪友亮.松辽盆地北部深层层序地层格架建立与模式研究:以古龙-常家围子断陷沙河子组为例[J].沉积学报,2010,28(3):489-496.PAN Chunfu,JI Youliang.The establishment of sequence stratigraphic framework and its models of deep formation in northern Songliao basin:taking the Shahezi formation of Gulong-Changjiaweizi fault depression as an example[J].Acta Sedmentologica Sinica,2010,28(3):489-496.
[3]陈贤良,纪友亮,樊太亮,等.松辽盆地梨树断陷层序类型及发育模式[J].中南大学学报(自然科学版),2014,45(4):1151-1162.CHEN Xianliang,JI Youliang,FAN Tailiang,et al.Sequence stratigraphic types and models in Lishu rift,Songliao basin[J].Journal of Central South University(Science and Technology),2014,45(4):1151-1162.
[4]蔡来星,卢双舫,巩兴会,等.徐家围子断陷南部沙河子组层序地层格架及沉积特征[J].大庆石油地质与开发,2015,34(2):26-33.CAI Laixing,LU Shuangfang,GONG Xinghui,et al.Sequence stratigraphic framework and sedimentary characteristics for Shahezi Formation in south Xujiaweizi fault depression[J].Petroleum Geology and Oilfield Development in Daqing,2015,34(2):26-33.
[5]王晓莲.徐家围子断陷安达凹陷沙河子组层序四沉积相研究及勘探意义[J].大庆石油地质与开发,2015,34(3):47-52.WANG Xiaolian.Study on the sedimentary facies and its exploratory significance for Shahezi Formation sequence SQ4in Anda sag of Xujiaweizi fault depression[J].Petroleum Geology and Oilfield Development in Daqing,2015,34(3):47-52.
[6]刘洋.徐家围子断陷沙河子组储层特征研究[D].大庆:东北石油大学,2013.LIU Yang.Research on reservoir characteristics of Shahezi Formation in Xujiaweizi depression[D].Daqin:Northeast Petroleum University,2013.
[7]吕鹏佶,柳成志,颜康,等.松辽盆地徐家围子断陷沙河子组地震相研究[J].地质与资源,2014,23(4):330-334.LYU Pengji,LIU Chengzhi,YAN Kang,et al.Study on the seismic facies of the Shahezi Formation in Xujiaweizi fault depression in Songliao Basin[J].Geology and Resources,2014,23(4):330-334.
[8]王志宏,李建明,王延斌,等.徐家围子断陷沙河子组煤层发育特征及分布预测[J].中国煤炭地质,2015,27(1):13-17,39.WANG Zhihong,LI Jianming,WANG Yanbin,et al.Shahezi Formation coal seam development features and distribution prediction in Xujiaweizi fault depression[J].Coal Geology of China,2015,27(1):13-17,39.
[9]陈波,黄发木,夏永涛,等.松辽盆地深层断陷发育特征与油气富集[J].石油与天然气地质,2008,29(4):428-432.CHEN Bo,HUANG Famu,XIA Yongtao,et al.Characteristics of development of deep fault depressions and hydrocarbon accumulation in the Songliao Basin[J].Oil&Gas Geology,2008,29(4):428-432.
[10]周荔青,雷一心.松辽盆地断陷层系大、中型油气田形成条件及勘探方向[J].石油与天然气地质,2006,27(6):820-826,840.ZHOU Liqing,LEI Yixin.Formation conditions for middle and large oil/gas fields in rift sequences of Songliao basin and thear future exploration targets[J].Oil&Gas Geology,2006,27(6):820-826,840.
[11]陈均亮,蔡希源,林春华,等.松辽盆地北部断陷盆地构造特征与幕式演化[J].石油学报,1999,20(4):14-18.CHEN Junliang,CAI Xiyuan,LIN Chunhua,et al.Tectonic characteristics and episodic evolution of the northern fault depression in Songliao Basin[J].Acta Petrolei Sinica,1999,20(4):14-18.
[12]葛荣峰,张庆龙,王良书,等.松辽盆地构造演化与中国东部构造体制转换[J].地质论评,2010,56(2):180-195.GE Rongfeng,ZHANG Qinglong,WANG Liangshu,et al.Tectonic evolution of Songliao Basin and the prominent tectonic regime transition in eastern China[J].Geological Review,2010,56(2):180-195.
[13]尹太举,张昌民.层序地层格架内的油气勘探[J].天然气地球科学,2005,16(1):25-30.YIN Taiju,ZHANG Changmin.Hydrocarbon exploration in the sequence stratigraphy frame work[J].Natural Gas Geoscience,2005,16(1):25-30.
[14]徐怀大.层序地层学理论用于我国断陷盆地分析中的问题[J].石油与天然气地质,1991,12(1):52-57.XU Huaida.Problems in analysis of faulted basins of China based on sequence stratigraphic theory[J].Oil&Gas Geology,1991,12(1):52-57.
[15]冯有良,李思田,解习农.陆相断陷盆地层序形成动力学及层序地层模式[J].地学前缘,2000,7(3):119-132.FENG Youliang,LI Sitian,XIE Xinong.Dynamics of sequence generation and sequence stratigraphic model in continental rift-subsidence basin[J].Earth Science Frontiers,2000,7(3):119-132.
[16]邱桂强.陆相断陷盆地高精度层序地层研究现状与思路[J].油气地质与采收率,2005,12(3):1-4,8.QIU Guiqiang.Current research situation and thinking on high accuracy sequence stratigraphy in the terrestrial rift basin[J].Petroleum Geology and Recovery Efficiency,2005,12(3):1-4,8.
[17]冯有良,周海民,李思田,等.陆相断陷盆地层序类型与构造特征[J].地质论评,2004,50(1):43-49.FENG Youliang,ZHOU Haimin,LI Sitian,et al.Sequence types and structural characteristics in continental rift-subsidence basins[J].Earth Science Frontiers,2004,50(1):43-49.
[18]赵文智,方杰.不同类型断陷湖盆岩性-地层油气藏油气富集规律:以冀中坳陷和二连盆地岩性-地层油气藏对比为例[J].石油勘探与开发,2007,34(2):129-134.ZHAO Wenzhi,FANG Jie.Petroleum enrichment rules in lithologic and stratigraphic pools in different faulted basins:an example from the correlation of lithologic and stratigraphic pools in Jizhong Depression and in Erlian Basin[J].Petroleum Exploration and Development,2007,34(2):129-134.
[19]谢晓安,周卓明.松辽盆地深层天然气勘探实践与勘探领域[J].石油与天然气地质,2008,29(1):113-119.XIE Xiaoan,ZHOU Zhuoming.Exploration practices and directions for deep natural gas in the Songliao Basin[J].Oil&Gas Geology,2008,29(1):113-119.
[20]康南昌,曹永忠,张秀顽,等.断陷盆地的后备勘探领域:深陷带[J].中国石油勘探,2013,18(1):29-34.KANG Nanchang,CAO Yongzhong,ZHANG Xiuwan,et al.Stand-by exploration field of rift basin:deep sag belt[J].China Petroleum Exploration,2013,18(1):29-34.
[21]信荃麟,朱筱敏,郑清,等.渤海湾盆地下第三系断陷湖盆沉积体系与油气分布[J].中国石油大学学报(自然科学版),1989,13(5):11-17.XIN Quanlin,ZHU Xiaomin,ZHENG Qing,et al.Depositional system and oil-gas occurrences of tertiary down-faulted lacustrine basins in Bohai Basin of China[J].Journal of the University of Petroleum,China,1989,13(5):11-17.
[22]付兆辉,张在振,李德纯,等.渤海湾盆地堤北凹陷古近系沉积体系分析与油气成藏[J].沉积学报,2009,27(1):26-31.FU Zhaohui,ZHANG Zaizheng,LI Dechun,et al.Analysis on sedimentary systems and hydrocarbon accumulation of Palaeogene,Chengbei Sag[J].Acta Sedimentologica Sinica,2009,27(1):26-31.
[23]王民,孙业峰,王文广,等.松辽盆地北部徐家围子断陷深层烃源岩生气特征及天然气资源潜力[J].天然气地球科学,2014,25(7):1011-1018.WANG Min,SUN Yefeng,WANG Wenguang,et al.Gas generation characteristics and resource potential of the deep source rock in Xujiaweizi Fault Depression,Northern Songliao Basin[J].Natural Gas Geoscience,2014,25(7):1011-1018.
[24]赵伟,邱隆伟,姜在兴,等.断陷湖盆萎缩期浅水三角洲沉积演化与沉积模式:以东营凹陷牛庄洼陷古近系沙三段上亚段和沙二段为例[J].地质学报,2011,85(6):1019-1027.ZHAO Wei,QIU Longwei,JIANG Zaixing,et al.Depositional evolution and model of shallow water delta in the rifting lacustrine basins during the shrinking stage:a case study of the Third Member and Second Member of Paleogene Shahejie Formation in the Niuzhuang Subsag,Dongying Sag[J].Acta Geologica Sinica,2011,85(6):1019-1027.
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