海拉尔盆地苏德尔特地区南屯组高分辨率层序地层格架及沉积特征
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摘要
针对苏德尔特地区南屯组时期的层序划分研究精度不够的问题,利用钻井、测井和地震等方面的资料,开展了南屯组的高分辨率层序划分对比方式以及基准面升降对沉积的控制作用研究。结果表明:研究区南屯组共可划分为3个长期旋回和12个中期旋回,主要发育扇三角洲和湖泊沉积体系;南屯组下部LSC1时期共经历了基准面缓慢上升、快速上升、升降转换、缓慢下降以及快速下降5个阶段,扇体的展布规模随基准面升降变化表现为先减小后增大的特征,湖泊分布范围则相反、呈先增大后减小的变化规律;长期旋回上升前期(MSC1、MSC2)与下降后期(MSC5)内水下分流河道砂体较发育,是优质的油气储集体,MSC3为南屯组内的最大湖泛期,暗色泥岩广泛发育,是优质的烃源岩层,源储上下紧邻,成藏条件优越,具较大的勘探潜力。
For the problem of the low-precision study on the sequence division at Nantun Formation stage in Sudeerte area,with the help of the drilling, logging and seismic data, the high-resolution sequence division and correlation methods of Nantun Formation and the controlling action of the base level rise-fall on the sedimentation were studied in Sudeerte structural belt of Beier Sag in Hailar Basin. The results show that Nantun Formation can be divided into three long-term cycles and twelve medium-term cycles with mainly well-developed fan delta and lake sedimentary system;during Period LSC1 Lower Nantun Formation,the study area has experienced five stages:slow rise, rapid rise, rise-fall conversion, slow decline and rapid decline of the long-term base level,the distribution scales of the fan body decrease first then increase with the rise-fall of the datum level, while the change laws of the lake body are just on the contrary;the underwater distributary channel sandbodies in the early long-term-cycle rise stage(MSC1, MSC2) and the late stage of the fall(MSC5) are well developed, so they are high-quality oil and gas reservoirs,MSC3 is the largest lake-flooding period in Nantun Formation, the dark mudstone is widely developed and becomes high-quality hydrocarbon source rock,the sources and reservoirs are close to each other and the reservoir-accumulating conditions are superior, so they have great exploration potential.
For the problem of the low-precision study on the sequence division at Nantun Formation stage in Sudeerte area,with the help of the drilling, logging and seismic data, the high-resolution sequence division and correlation methods of Nantun Formation and the controlling action of the base level rise-fall on the sedimentation were studied in Sudeerte structural belt of Beier Sag in Hailar Basin. The results show that Nantun Formation can be divided into three long-term cycles and twelve medium-term cycles with mainly well-developed fan delta and lake sedimentary system;during Period LSC1 Lower Nantun Formation,the study area has experienced five stages:slow rise, rapid rise, rise-fall conversion, slow decline and rapid decline of the long-term base level,the distribution scales of the fan body decrease first then increase with the rise-fall of the datum level, while the change laws of the lake body are just on the contrary;the underwater distributary channel sandbodies in the early long-term-cycle rise stage(MSC1, MSC2) and the late stage of the fall(MSC5) are well developed, so they are high-quality oil and gas reservoirs,MSC3 is the largest lake-flooding period in Nantun Formation, the dark mudstone is widely developed and becomes high-quality hydrocarbon source rock,the sources and reservoirs are close to each other and the reservoir-accumulating conditions are superior, so they have great exploration potential.
引文
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[13]渠永宏,廖远慧,赵利华,等.高分辨率层序地层学在断陷盆地中的应用:以海拉尔盆地贝尔断陷为例[J].石油学报,2006,27( 增刊1) :31-37.QU Yonghong,LIAO Yuanhui,ZHAO Lihua,et al.Application of high-resolution sequence stratigraphy in rift basin:Taking Beier Fault-Depression of Hailaer Basin as example[J].Acta Petrolei Sinica,2006,27(S1) :31-37.
[14]王雅宁,鲍志东,彭仕宓,等.贝尔凹陷关键层序识别与油气意义[J].石油天然气学报,2012,34(8) :11-16.WANG Yaning,BAO Zhidong,PENG Shimi,et al.Characteristics and hydrocarbon significances of key sequences in Bei’er Sag[J].Journal of Oil and Gas Technology,2012,34 (8):11-16.
[15]杨婷,金振奎,张雷,等.海拉尔盆地贝尔凹陷贝西地区南屯组层序地层特征[J].吉林大学学报(自然科学版),2011,41 (3) :629-638 .YANG Ting,JIN Zhenkui,ZHANG Lei,et al.Sequence stratigraphic characteristic of the Nantun Formation in the western area of Beier Depression,Hailaer Basin[J].Journal of Jilin University(Earth ScienceEdition),2011,41(3) :629-638.
[16]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):369-374.ZHENG Rongcai,YIN Shimin,PENG Jun.Sedimentary dynamic analysis of sequence structure and stacking pattern of base-level cycle[J]ACTA Sedimentologica Sinica,2000,18(3):369-374.
[17]李跃,蒙启安,李军辉,等.贝尔凹陷贝西地区南屯组物源特征及其对沉积体系的控制[J].沉积学报,2018,36(4):756-767.LI Yue,Meng Qi’an,LI Junhui,et al.The characteristics of provenance system and their control on sedimentary system of Nantun Formation in the Beier Depression,Northern China[J].ACTA Sedimentologica Sinica,2018,36(4):756-767.
[18]蒙启安,李跃,李军辉,等.复杂断陷盆地源—汇时空耦合控砂机制分析:以海拉尔盆地贝尔凹陷为例[J].中国矿业大学学报,2019,48(2):412-420.MENG Qi’an,LI Yue,LI Junhui,et al.Analysis of source and convergence coupling control sand mechanism in complicated faulted basin:An example of Beier Depressionin Hailar Basin[J].Journal of China University of Mining & Technology,2019,48(2):412-420.
[2]CROSS T A.Controls on coal distribution in transgressive-regressive cycles,Upper Cretaceous,Western Interior,U S A[G]//Wilgaus C K.Sea-level changes:An integrated approach.USA:SEPM,Special Publication,1988:371-380.
[3]邓宏文.美国层序地层研究中的新学派:高分辨率层序地层学[J].石油与天然气地质,1995,16(2):89-97.DENG Hongwen.A new school of thought in sequence stratigraphic studies in U S A:High-resolution sequence stratigraphy[J].Oil & Gas Geology,1995,16(2):89-97.
[4]邓宏文,王红亮,宁宁.沉积物体积分配原理:高分辨率层序地层学的理论基础[J].地学前缘,2000,7(4):305-313.DENG Hongwen,WANG Hongliang,NING Ning.Sediment volume partition principle:Theory basic for high-resolution sequence stratigraphy[J].Earth Science Frontiers,2000,7(4):305-313.
[5]李军辉.海拉尔盆地呼和湖凹陷下白垩统层序构成样式及油气成藏模式[J].吉林大学学报(地球科学版)2012,42 (4) :961-969.LI Junhui.Sequence architecture pattern and pool-forming pattern of Lower Cretaceous in Huhehu Depression[J].Journal of Jilin University(Earth Science Edition),2012,42 (4) :961-969.
[6]冯有良,徐秀生.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):22-31.FENG Youliang,XU Xiusheng.Syndepositional structural slope-break zone controls on lithologic reservoirs:A case from paleogene Bohai Bay Basin[J].Petroleum Exploration and Development,2006,33(1):22-31.
[7]梅冥相.从旋回的有序叠加形式到层序的识别和划分:层序地层学进展之三[J].古地理学报,2011,13(1):37-54.MEI Mingxiang.From vertical stacking pattern of cycles to discerning and division of seuences:The third advance in sequence stratigraphy[J].Journal of Palaeogeography,2011,13(1):37-54.
[8]陈均亮,吴河勇,朱德丰,等.海拉尔盆地构造演化及油气勘探前景[J].地质科学,2007,42(1):147-159.CHEN Junliang,WU Heyong,ZHU Defeng,et al.Tectonic evolution of the Hailar Basin and its potentials of oil-gas exploration[J].Chinese Journal of Geology(Scientia Geologica Sinica),2007,42(1):147-159.
[9]侯艳平,朱德丰,任延广,等.贝尔凹陷构造演化及其对沉积和油气的控制作用[J].大地构造与成矿学,2008,32(3):300-307.HOU Yanping,ZHU Defeng,REN Yanguang,et al.Tectonic evolution and its controlling on sedimentation and hydrocarbon accumulation in Beir Depression[J].Geotectonica Et Metallogenia,2008,32(3):300-307.
[10]刘志宏,万传彪,任延广,等.海拉尔盆地乌尔逊—贝尔凹陷的地质特征及油气成藏规律[J].吉林大学学报(地球科学版),2006,36(4):527-534.LIU Zhihong,WAN Chuanbiao,REN Yanguang,et al.Geological features and the rule of oil and gas accumulation of Wuerxun-Beier Depression in Hailaer Basin[J].Journal of Jilin University(Earth Science Edition),2006,36(4):527-534.
[11]吴河勇,李子顺,冯子辉,等.海拉尔盆地乌尔逊—贝尔凹陷构造特征与油气成藏过程分析[J].石油学报,2006,21(增刊1):1-6.WU Heyong,LI Zishun,FENG Zihui,et al.Analysis on structural features and reservoir-forming process of Wuerxun and Beier Sags in Hailaer Basin[J].Acta Petrolei Sinica,2006,27(S1):1-6.
[12]蒙启安,刘一丹,李军辉,等.海拉尔塔木察格盆地中部断陷带油气形成条件及富集规律[J].吉林大学学报(地球科学版),2014,(6):1737-1746.MENG Qi’an,LIU Yidan,LI Junhui,et al.Formation and accumulation rules of oil and gas in middle fault depression belt of Hailar-Tamtsag Basin[J].Journal of Jilin University(Earth Science Edition),2014,(6):1737-1746.
[13]渠永宏,廖远慧,赵利华,等.高分辨率层序地层学在断陷盆地中的应用:以海拉尔盆地贝尔断陷为例[J].石油学报,2006,27( 增刊1) :31-37.QU Yonghong,LIAO Yuanhui,ZHAO Lihua,et al.Application of high-resolution sequence stratigraphy in rift basin:Taking Beier Fault-Depression of Hailaer Basin as example[J].Acta Petrolei Sinica,2006,27(S1) :31-37.
[14]王雅宁,鲍志东,彭仕宓,等.贝尔凹陷关键层序识别与油气意义[J].石油天然气学报,2012,34(8) :11-16.WANG Yaning,BAO Zhidong,PENG Shimi,et al.Characteristics and hydrocarbon significances of key sequences in Bei’er Sag[J].Journal of Oil and Gas Technology,2012,34 (8):11-16.
[15]杨婷,金振奎,张雷,等.海拉尔盆地贝尔凹陷贝西地区南屯组层序地层特征[J].吉林大学学报(自然科学版),2011,41 (3) :629-638 .YANG Ting,JIN Zhenkui,ZHANG Lei,et al.Sequence stratigraphic characteristic of the Nantun Formation in the western area of Beier Depression,Hailaer Basin[J].Journal of Jilin University(Earth ScienceEdition),2011,41(3) :629-638.
[16]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):369-374.ZHENG Rongcai,YIN Shimin,PENG Jun.Sedimentary dynamic analysis of sequence structure and stacking pattern of base-level cycle[J]ACTA Sedimentologica Sinica,2000,18(3):369-374.
[17]李跃,蒙启安,李军辉,等.贝尔凹陷贝西地区南屯组物源特征及其对沉积体系的控制[J].沉积学报,2018,36(4):756-767.LI Yue,Meng Qi’an,LI Junhui,et al.The characteristics of provenance system and their control on sedimentary system of Nantun Formation in the Beier Depression,Northern China[J].ACTA Sedimentologica Sinica,2018,36(4):756-767.
[18]蒙启安,李跃,李军辉,等.复杂断陷盆地源—汇时空耦合控砂机制分析:以海拉尔盆地贝尔凹陷为例[J].中国矿业大学学报,2019,48(2):412-420.MENG Qi’an,LI Yue,LI Junhui,et al.Analysis of source and convergence coupling control sand mechanism in complicated faulted basin:An example of Beier Depressionin Hailar Basin[J].Journal of China University of Mining & Technology,2019,48(2):412-420.