吉木萨尔凹陷芦草沟组致密油储层沉积相分析
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摘要
利用岩芯、薄片、录井和测井等资料,在识别各级次基面旋回界面类型及特征的基础上,将准噶尔盆地吉木萨尔凹陷芦草沟组划分为1个长期旋回,6个中期旋回,44个短期旋回,建立高分辨率层序地层对比格架。在总结地球化学、岩性、沉积构造、电性特征的基础上,综合分析古生物化石、测井等资料,以识别沉积相标志为主,进行单井、连井及平面沉积相分析。研究结果认为,吉木萨尔凹陷芦草沟组为咸化湖泊—三角洲沉积体系,岩性复杂多变,在机械、化学、生物等沉积作用共同影响下,形成由细粒碎屑岩、泥岩、碳酸盐岩构成的混积岩层。芦草沟组发育上、下两个致密油甜点体,上甜点体(SSC37—SSC42)为咸化湖相沉积,微相类型以滩坝为主;下甜点体(SSC6—SSC17)以三角洲前缘沉积为主,微相类型为席状砂、远砂坝等。利用开发试验区及水平井部署区的井多、井密的有利条件,对沉积相边界进行控制,从而实现平面微相的精细刻画,研究表明芦草沟组优质甜点以滩坝主体微相为主,主要集中发育在凹陷中心低隆起处。
Using cores,thin section,log and well log data,based on the identification of every base types and characteristics of the cycle interface,the Permian Lucaogou Formation strata in Jimsar sag are divided into 1 long-term cycles,6 medium-term cycles and 44 short-term cycles,the high resolution sequence stratigraphy correlation framework is established. On the basis of summarizing the geochemistry,lithology,sedimentary structure and electrical characteristics,comprehensive analysis of fossils and logging data to identify the sedimentary facies marks,single well,well connected and plane sedimentary facies analysis,the Permian Lucaogou Formation strata are mainly salified-lake facies,locally delta facies deposit,with the complex lithology formed by mechanical deposition,chemical deposition,and the deposition of fine clastic rocks,mud and carbonate rocks which are deposited under the influence of the deposition. Lucaogou Formation developed two tight oil body sweet spot,the upper body is a kind of salty lacustrine carbonate rocks,the types of micro facies in shallow lake dam; The inferior dessert is mainly based on the delta front to the former delta subfacies. Micro facies type is sheet sand and far sand dam. At the same time,the advantage of horizontal continuous change of reservoir in the area of the study area and the level of the well is to be revealed by the reservoir,control of planar micro facies boundary in tight oil reservoir,thus more accurately reflect the plane distribution characteristics of tight oil reservoir. Research shows that the quality of Lucaogou Formation near to the sweet spot is beach bar microfacies mainly developed in the center of the sag at low uplift.
Using cores,thin section,log and well log data,based on the identification of every base types and characteristics of the cycle interface,the Permian Lucaogou Formation strata in Jimsar sag are divided into 1 long-term cycles,6 medium-term cycles and 44 short-term cycles,the high resolution sequence stratigraphy correlation framework is established. On the basis of summarizing the geochemistry,lithology,sedimentary structure and electrical characteristics,comprehensive analysis of fossils and logging data to identify the sedimentary facies marks,single well,well connected and plane sedimentary facies analysis,the Permian Lucaogou Formation strata are mainly salified-lake facies,locally delta facies deposit,with the complex lithology formed by mechanical deposition,chemical deposition,and the deposition of fine clastic rocks,mud and carbonate rocks which are deposited under the influence of the deposition. Lucaogou Formation developed two tight oil body sweet spot,the upper body is a kind of salty lacustrine carbonate rocks,the types of micro facies in shallow lake dam; The inferior dessert is mainly based on the delta front to the former delta subfacies. Micro facies type is sheet sand and far sand dam. At the same time,the advantage of horizontal continuous change of reservoir in the area of the study area and the level of the well is to be revealed by the reservoir,control of planar micro facies boundary in tight oil reservoir,thus more accurately reflect the plane distribution characteristics of tight oil reservoir. Research shows that the quality of Lucaogou Formation near to the sweet spot is beach bar microfacies mainly developed in the center of the sag at low uplift.
引文
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[7]张义杰,齐雪峰,程显胜,等.准噶尔盆地晚石炭世和二叠纪沉积环境[J].新疆石油地质,2007,28(6):673-675.[Zhang Yijie,Qi Xuefeng,Cheng Xiansheng,et al.Approach to sedimentary environment of Late Carboniferous-Permian in Junggar basin[J].Xinjiang Petroleum Geology,2007,28(6):673-675.]
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[10]斯春松,陈能贵,余朝丰,等.吉木萨尔凹陷二叠系芦草沟组致密油储层沉积特征[J].石油实验地质,2013,35(5):528-533.[Si Chunsong,Chen Nenggui,Yu Chaofeng,et al.Sedimentary characteristics of tight oil reservoir in Permian Lucaogou Formation,Jimsar sag[J].Petroleum Geology&Experiment,2013,35(5):528-533.]
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[12]方世虎,宋岩,徐怀民,等.构造演化与含油气系统的形成——以准噶尔盆地东部吉木萨尔凹陷为例[J].石油实验地质,2007,29(2):149-153,161.[Fang Shihu,Song Yan,Xu Huaimin,et al.Relationship between tectonic evolution and petroleum system formation—Taking the Jimsar sag of eastern Junggar Basin as an example[J].Petroleum Geology&Experiment,2007,29(2):149-153,161.]
[13]杨和山,陈洪,卞保利.吉木萨尔凹陷构造演化与油气成藏[J].内蒙古石油化工,2012(15):138-140.[Yang Heshan,Chen Hong,Bian Baoli.Structure modeling and geometry analysis in the western Fukang fault zone[J].Inner Mongolia Petrochemical Industry,2012(15):138-140.]
[14]陈春勇,谭强,张金风,等.吉木萨尔凹陷二叠系梧桐沟组一段沉积演化规律[J].新疆石油地质,2015,36(2):169-173,213.[Chen Chunyong,Tan Qiang,Zhang Jinfeng,et al.Sedimentary evolution of the Member 1 of Permian Wutonggou Formation in Jimusaer sag,Junggar Basin[J].Xinjiang Petroleum Geology,2015,36(2):169-173,213.]
[15]朱键.吉木萨尔凹陷东部二叠系梧桐沟组沉积相研究[D].荆州:长江大学,2013.[Zhu Jian.Research of sedimentary facies of the Permian Wutonggou Formation of Jimsar sag in eastern Junggar Basin[D].Jingzhou:Yangtze University,2013.]
[16]董清水,崔宝琛,李想,等.陆相层序地层划分及岩芯、测井高分辨率层序地层界面判识[J].石油实验地质,1997,19(2):121-126.[Dong Qingshui,Cui Baochen,Li Xiang,et al.A division of continental sequence stratigraphy and the identification of its interface with high resolution core analyses and well-logging[J].Petroleum Geology&Experiment,1997,19(2):121-126.]
[17]孙钰,钟建华,袁向春,等.惠民凹陷沙一段湖相碳酸盐岩层序地层分析[J].石油学报,2008,29(2):213-218.[Sun Yu,Zhong Jianhua,Yuan Xiangchun,et al.Analysis on sequence stratigraphy of lacustrine carbonate in the first member of Shahejie Formation in Huimin sag[J].Acta Petrolei Sinica,2008,29(2):213-218.]
[18]Cross T A.High-resolution stratigraphic correlation from the perspective of base-level cycles and sediment accommodation[C]//Proceedings of Northwestern Europian Sequence Stratigraphy Congress.1994:105-123.
[19]马世忠.松辽盆地河流—三角洲体系高分辨率层序地层学、储层构形及非均质模型研究[D].北京:中国科学院大学,2003:99-109.[Ma Shizhong.Studies of high-resolution sequence stratigraphy,reservoir architecture and heterogeneity model in fluvial-delta system,Songliao Basin[D].Beijing:University of Chinese Academy of Sciences,2003:99-109.]
[20]同济大学海洋地质系.海、陆相地层辨认标志[M].北京:科学出版社,1980.[Department of Marine Geology,Tongji University.Marine Facies Identification Marks[M].Beijing:Science Press,1980.]
[21]南京大学地质学系.地球化学[M].北京:科学出版社,1979:361-363.[Department of Geology,Nanjing University.Geochemistry[M].Beijing:Science Press,1979:361-363.]
[22]孙立广,谢周清,赵俊琳.南极阿德雷岛湖泊沉积物Sr/Ba与B/Ga比值特征[J].海洋地质与第四纪地质,2000,20(4):43-46.[Sun Liguang,Xie Zhouqing,Zhao Junlin.The characteristics of Sr/Ba and B/Ga ratios in lake sediments on the Ardley Peninsula,Maritime Antarctic[J].Marine Geology&Quaternary Geology,2000,20(4):43-46.]
[23]王学军,王志欣,刘显阳,等.利用铀的测井响应恢复鄂尔多斯盆地古水深[J].天然气工业,2008,28(7):46-48.[Wang Xuejun,Wang Zhixin,Liu Xianyang,et al.Restoring palaeo-depth of the Ordos Basin by using uranium from GR logging[J].Natural Gas Industry,2008,28(7):46-48.]
[24]匡立春,孙中春,欧阳敏,等.吉木萨尔凹陷芦草沟组复杂岩性致密油储层测井岩性识别[J].测井技术,2013,37(6):638-642.[Kuang Lichun,Sun Zhongchun,Ouyang Min,et al.Complication lithology logging identification of the Lucaogou tight oil reservoir in Jimusaer depression[J].Well Logging Technology,2013,37(6):638-642.]
[25]时丕同.吉木萨尔凹陷油藏地球化学研究[D].成都:西南石油学院,2003.[Shi Peitong.Study on geochemical reservoirs in Jimsar sag[D].Chengdu:Southwest Petroleum University,2003.]
[26]姜在兴,王俊辉,张元福.滩坝沉积研究进展综述[J].古地理学报,2015,17(4):427-440.[Jiang Zaixing,Wang Junhui,Zhang Yuanfu.Advances in beach-bar research:a review[J].Journal of Palaeogeography,2015,17(4):427-440.]
[2]匡立春,胡文瑄,王绪龙,等.吉木萨尔凹陷芦草沟组致密油储层初步研究:岩性与孔隙特征分析[J].高校地质学报,2013,19(3):529-535.[Kuang Lichun,Hu Wenxuan,Wang Xulong,et al.Research of the tight oil reservoir in the Lucaogou Formation in Jimusar sag:analysis of lithology and porosity characteristics[J].Geological Journal of China Universities,2013,19(3):529-535.]
[3]彭雪峰,汪立今,姜丽萍.准噶尔盆地东南缘二叠系芦草沟组沉积环境分析[J].新疆大学学报:自然科学版,2011,28(4):395-400.[Peng Xuefeng,Wang Lijin,Jiang Liping.Analysis of sedimentary environment of the Permian Lucaogou Formation in southeastern margin of the Junggar Basin[J].Journal of Xinjiang University:Natural Science Edition,2011,28(4):395-400.]
[4]张健,刘楼军,黄芸,等.准噶尔盆地吉木萨尔凹陷中—上二叠统沉积相特征[J].新疆地质,2003,21(4):412-414.[Zhang Jian,Liu Loujun,Huang Yun,et al.Sedinentary characteristics of Middle-Upper Permian in Jimusaer sag of Junggar Basin[J].Xinjiang Geology,2003,21(4):412-414.]
[5]高智梁,康永尚,刘人和,等.准噶尔盆地南缘芦草沟组油页岩地质特征及主控因素[J].新疆地质,2011,29(2):189-193.[Gao Zhiliang,Kang Yongshang,Liu Renhe,et al.Geological features and developmental controlling factors of Lucaogou oil shale in the southern margin of Junngar Basin[J].Xinjiang Geology,2011,29(2):189-193.]
[6]王成云,匡立春,高岗,等.吉木萨尔凹陷芦草沟组泥质岩类生烃潜力差异性分析[J].沉积学报,2014,32(2):385-390.[Wang Chengyun,Kuang Lichun,Gao Gang,et al.Difference in hydrocarbon generation potential of the shaly source rocks in Jimusar sag,Permian Lucaogou Formation[J].Acta Sedimentologica Sinica,2014,32(2):385-390.]
[7]张义杰,齐雪峰,程显胜,等.准噶尔盆地晚石炭世和二叠纪沉积环境[J].新疆石油地质,2007,28(6):673-675.[Zhang Yijie,Qi Xuefeng,Cheng Xiansheng,et al.Approach to sedimentary environment of Late Carboniferous-Permian in Junggar basin[J].Xinjiang Petroleum Geology,2007,28(6):673-675.]
[8]匡立春,唐勇,雷德文,等.准噶尔盆地二叠系咸化湖相云质岩致密油形成条件与勘探潜力[J].石油勘探与开发,2012,39(6):657-667.[Kuang Lichun,Tang Yong,Lei Dewen,et al.Formation conditions and exploration potential of tight oil in the Permian saline lacustrine dolomitic rock,Junggar Basin,NW China[J].Petroleum Exploration and Development,2012,39(6):657-667.]
[9]万敏,常秋生.吉木萨尔凹陷芦草沟组致密油储层成岩序列及孔隙演化[J].吉林大学学报:地球科学版,2015,45(增刊1):866.[Wan Min,Chang Qiusheng.Analysis of diagenetic sequence and porosity evolution of the tight oil reservoir in the Lucaogou Formation in Jimusaer sag[J].Journal of Jilin University:Earth Science Edition,2015,45(Suppl.1):866.]
[10]斯春松,陈能贵,余朝丰,等.吉木萨尔凹陷二叠系芦草沟组致密油储层沉积特征[J].石油实验地质,2013,35(5):528-533.[Si Chunsong,Chen Nenggui,Yu Chaofeng,et al.Sedimentary characteristics of tight oil reservoir in Permian Lucaogou Formation,Jimsar sag[J].Petroleum Geology&Experiment,2013,35(5):528-533.]
[11]吴承美,郭智能,唐伏平,等.吉木萨尔凹陷二叠系芦草沟组致密油初期开采特征[J].新疆石油地质,2014,35(5):570-573.[Wu Chengmei,Guo Zhineng,Tang Fuping,et al.Early exploitation characteristics of Lucaogou tight oil of Permian in Jimusaer sag,Junggar Basin[J].Xinjiang Petroleum Geology,2014,35(5):570-573.]
[12]方世虎,宋岩,徐怀民,等.构造演化与含油气系统的形成——以准噶尔盆地东部吉木萨尔凹陷为例[J].石油实验地质,2007,29(2):149-153,161.[Fang Shihu,Song Yan,Xu Huaimin,et al.Relationship between tectonic evolution and petroleum system formation—Taking the Jimsar sag of eastern Junggar Basin as an example[J].Petroleum Geology&Experiment,2007,29(2):149-153,161.]
[13]杨和山,陈洪,卞保利.吉木萨尔凹陷构造演化与油气成藏[J].内蒙古石油化工,2012(15):138-140.[Yang Heshan,Chen Hong,Bian Baoli.Structure modeling and geometry analysis in the western Fukang fault zone[J].Inner Mongolia Petrochemical Industry,2012(15):138-140.]
[14]陈春勇,谭强,张金风,等.吉木萨尔凹陷二叠系梧桐沟组一段沉积演化规律[J].新疆石油地质,2015,36(2):169-173,213.[Chen Chunyong,Tan Qiang,Zhang Jinfeng,et al.Sedimentary evolution of the Member 1 of Permian Wutonggou Formation in Jimusaer sag,Junggar Basin[J].Xinjiang Petroleum Geology,2015,36(2):169-173,213.]
[15]朱键.吉木萨尔凹陷东部二叠系梧桐沟组沉积相研究[D].荆州:长江大学,2013.[Zhu Jian.Research of sedimentary facies of the Permian Wutonggou Formation of Jimsar sag in eastern Junggar Basin[D].Jingzhou:Yangtze University,2013.]
[16]董清水,崔宝琛,李想,等.陆相层序地层划分及岩芯、测井高分辨率层序地层界面判识[J].石油实验地质,1997,19(2):121-126.[Dong Qingshui,Cui Baochen,Li Xiang,et al.A division of continental sequence stratigraphy and the identification of its interface with high resolution core analyses and well-logging[J].Petroleum Geology&Experiment,1997,19(2):121-126.]
[17]孙钰,钟建华,袁向春,等.惠民凹陷沙一段湖相碳酸盐岩层序地层分析[J].石油学报,2008,29(2):213-218.[Sun Yu,Zhong Jianhua,Yuan Xiangchun,et al.Analysis on sequence stratigraphy of lacustrine carbonate in the first member of Shahejie Formation in Huimin sag[J].Acta Petrolei Sinica,2008,29(2):213-218.]
[18]Cross T A.High-resolution stratigraphic correlation from the perspective of base-level cycles and sediment accommodation[C]//Proceedings of Northwestern Europian Sequence Stratigraphy Congress.1994:105-123.
[19]马世忠.松辽盆地河流—三角洲体系高分辨率层序地层学、储层构形及非均质模型研究[D].北京:中国科学院大学,2003:99-109.[Ma Shizhong.Studies of high-resolution sequence stratigraphy,reservoir architecture and heterogeneity model in fluvial-delta system,Songliao Basin[D].Beijing:University of Chinese Academy of Sciences,2003:99-109.]
[20]同济大学海洋地质系.海、陆相地层辨认标志[M].北京:科学出版社,1980.[Department of Marine Geology,Tongji University.Marine Facies Identification Marks[M].Beijing:Science Press,1980.]
[21]南京大学地质学系.地球化学[M].北京:科学出版社,1979:361-363.[Department of Geology,Nanjing University.Geochemistry[M].Beijing:Science Press,1979:361-363.]
[22]孙立广,谢周清,赵俊琳.南极阿德雷岛湖泊沉积物Sr/Ba与B/Ga比值特征[J].海洋地质与第四纪地质,2000,20(4):43-46.[Sun Liguang,Xie Zhouqing,Zhao Junlin.The characteristics of Sr/Ba and B/Ga ratios in lake sediments on the Ardley Peninsula,Maritime Antarctic[J].Marine Geology&Quaternary Geology,2000,20(4):43-46.]
[23]王学军,王志欣,刘显阳,等.利用铀的测井响应恢复鄂尔多斯盆地古水深[J].天然气工业,2008,28(7):46-48.[Wang Xuejun,Wang Zhixin,Liu Xianyang,et al.Restoring palaeo-depth of the Ordos Basin by using uranium from GR logging[J].Natural Gas Industry,2008,28(7):46-48.]
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