雅布赖盆地侏罗系新河组致密油形成条件与有利区资源潜力
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摘要
雅布赖盆地是我国西部一个侏罗纪湖相含油气盆地。为了评价其侏罗系新河组致密油的勘探前景,基于烃源岩、储集层条件及其配置关系的分析,采用地质要素叠合法优选出盆地的致密油有利区,并利用小面元容积法估算了资源潜力。研究表明,雅布赖盆地的优质烃源岩主要分布在中侏罗统新河组下段,累积厚度大、有机质丰度高、有机质类型好、处于生油的成熟热演化阶段,为致密油主要发育段;低孔、低渗的致密储集层主要以薄互层或夹层形式分布在烃源岩层内,原油具备典型的源内自生自储特征;成熟的富有机质烃源岩与储集层的大面积直接接触和巨厚的泥岩封盖是致密油发育的重要控制因素。首先,通过烃源岩成熟度确定了小湖次凹为致密油发育有利部位。然后,综合测井和录井油气显示成果,依据烃源岩TOC(有机碳含量)>1%、0.6%10 m的标准,圈定了盆地致密油有利区主要分布在小湖次凹的中西部。最后,根据小面元容积法估算有利区石油地质资源量大致为0.92×10~8t,资源丰度平均为34.5×10~4t/km~2。
The Yaburai Basin is a Jurassic lacustrine petroliferous basin in western China. In order to assess tight oil potential of the Xinhe Formation in the basin,we employed a geological factor superimposition method to select tight oil play fairway and a small cell volumetric method to calculate the resources based on analyses of source rocks and reservoiring conditions as well as their coupling relationship in the basin. The research shows that high-quality source rocks are mainly located in the lower Xinhe Formation in the Middle Jurassic. Tight oil reservoirs are mainly developed in this source rock interval featuring in large cumulative thickness,rich organic matter of favorable types,and being within oil window.Low-porosity and low-permeability tight reservoirs occur as thin interbeds and interlayers inside the source rocks. Crude found there shows clear signs of self-generation and self-preservation. The large area of contact between matured organicrich source rocks and reservoirs and the effective sealing of massive mud rock cap are the most important controlling factors of tight oil reservoirs in the basin. The sub-sag Xiaohu was considered to be a play fairway based on analyses of maturity of source rocks. A comprehensive study of mud and wireline logging data as well as oil and gas shows were used to establish a standard(TOC > 1%,0. 6% < Ro< 1. 3%,reservoir porosity ≥4%,accumulative thickness > 10m) to pinpoint the location of play fairway at the central and western part of the subsag. Calculation shows that the target holds an oil-in-place of 92 million tons and resource abundance of 345 thousand tons per square kilometers.
The Yaburai Basin is a Jurassic lacustrine petroliferous basin in western China. In order to assess tight oil potential of the Xinhe Formation in the basin,we employed a geological factor superimposition method to select tight oil play fairway and a small cell volumetric method to calculate the resources based on analyses of source rocks and reservoiring conditions as well as their coupling relationship in the basin. The research shows that high-quality source rocks are mainly located in the lower Xinhe Formation in the Middle Jurassic. Tight oil reservoirs are mainly developed in this source rock interval featuring in large cumulative thickness,rich organic matter of favorable types,and being within oil window.Low-porosity and low-permeability tight reservoirs occur as thin interbeds and interlayers inside the source rocks. Crude found there shows clear signs of self-generation and self-preservation. The large area of contact between matured organicrich source rocks and reservoirs and the effective sealing of massive mud rock cap are the most important controlling factors of tight oil reservoirs in the basin. The sub-sag Xiaohu was considered to be a play fairway based on analyses of maturity of source rocks. A comprehensive study of mud and wireline logging data as well as oil and gas shows were used to establish a standard(TOC > 1%,0. 6% < Ro< 1. 3%,reservoir porosity ≥4%,accumulative thickness > 10m) to pinpoint the location of play fairway at the central and western part of the subsag. Calculation shows that the target holds an oil-in-place of 92 million tons and resource abundance of 345 thousand tons per square kilometers.
引文
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[12]吴伟涛,邓静,赵靖舟,等.鄂尔多斯盆地华庆地区长7油层组致密油成藏条件与成藏模式[J].石油与天然气地质,2016,37(6):874-881.Wu Weitao,Deng Jing,Zhao Jingzhou,et al.Accumulation conditions and models of tight oil reservoirs in Chang-7 of Huaqing area,the Ordos Basin[J].Oil&Gas Geology,2016,37(6):874-881.
[13]钟玮,林常梅.雅布赖盆地中生代构造特征[J].四川地质学报,2013,33(1):7-11.Zhong Wei,Lin Changmei.Tectonic characteristics of Mesozoic Era in Yabrai Basin[J].Journal of Sichuan Geology,2013,33(1):7-11.
[14]田涛,任战利,马国福,等.雅布赖盆地萨尔台凹陷烃源岩地球化学特征、成熟度演化与油气关系[J].地球物理学进展,2014,29(6):2745-2753.Tian Tao,Ren Zhangli,Ma Guofu,et al.The relations of hydrocarbon generation to the geochemical features and maturity evolution of source rocks in Sartai Sag,Yabrai Basin[J].Progress in Geophysics,2014,29(6):2745-2753.
[15]黄军平,杨克荣,杨占龙,等.雅布赖盆地侏罗系烃源岩特征及油气勘探方向[J].天然气地球科学,2013,24(5):948-955.Huang Junping,Yang Kerong,Yang Zhanlong,et al.Characteristics of Jurassic source rocks and direction of petroleum exploration in Yaburai Basin,China[J].Natural Gas Geoscience,2013,24(5):948-955.
[16]吴晓智,王桂君,郑民,等.雅布赖盆地构造演化与油气聚集[J].地质科学,2015,50(1):74-87.Wu Xiaozhi,Wang Guijun,Zheng Min,et al.Structural evolution and hydrocarbon accumulation in Yaburai Basin[J].Chinese Journal of Geology,2015,50(1):74-87.
[17]王联社,李香平.试论雅布赖盆地砂岩型铀矿成矿前景[J].铀矿地质,2003,19(6):339-343.Wang Lianshe,Li Xiangping.Discussion on metallogenic prospect of sandstone-type uranium deposit in Yaburai basin[J].Uranium Geology,2003,19(6):339-343.
[18]赵宏波.雅布赖盆地中生代构造特征[J].石油化工应用,2011,30(9):71-75.Zhao Hongbo.Basin tectonic characteristics of Mesozoic Era in Yabrai Basin[J].Petrochemical Industry Application,2011,30(9):71-75.
[19]钟福平,钟建华,由伟丰,等.内蒙古雅布赖盆地红柳沟中侏罗统沉积相及沉积环境研究[J].地球科学与环境学报,2010,32(2):149-154.Zhong Fuping,Zhong Jianghua,You Weifeng,et al.Study on sedimentary facies and environment of Middle Jurassic in Hongliugou of Yaburai Basin,Inner Mongolia[J].Journal of Earth Sciences and Environment,2010,32(2):149-154.
[20]吴茂炳,刘春燕,郑孟林,等.内蒙古西部雅布赖盆地侏罗纪沉积-构造演化及油气勘探方向[J].地质通报,2007,26(7):857-864.Wu Maobing,Liu Chunyang,Zheng Menglin,et al.Jurassic depositional-tectonic evolution in the Yaburai Basin,western Inner Mongolia,China and direction of petroleum exploration[J].Geological Bulletin of China,2007,26(7):857-864.
[21]Passey Q R A.Practical model for organic richness from porosity and resistivity logs[J].AAPG Bulletin,1990,74(12):1777-1794.
[22]高岗,王绪龙,柳广弟,等.准噶尔盆地上三叠统源岩TOC含量预测方法[J].高校地质学报,2012,18(4):1-6.Gao Gang,Wang Xulong,Liu Guangdi,et al.Prediction method of organic carbon abundance of dark color mudstones in the Triassic System of Junggar Basin[J].Geological Journal of China Universities,2012,18(4):1-6.
[23]孟元林,申婉琪,周新桂,等.东部盆地群下白垩统烃源岩特征与页岩气勘探潜力[J].石油与天然气地质,2016,37(6):893-902.Meng Yuanlin,Shen Wanqi,Zhou Xingui,et al.Characteristics of the Lower Cretaceous source rocks and shale gas exploration potential of eastern basin group,NE China[J].Oil&Gas Geology,2016,37(6):893-902.
[2]Houston M,Mccallister M,Jany J.Next generation multi-stage completion technology and risk sharing accelerates development of the Bakken play[J].SPE 135584,2010.
[3]Clarkson C R,Pcdcrsen P K.Production analysis of western Canadian unconventional light oil plays[J].SPE 149005,2011:1-23.
[4]林森虎,邹才能,袁选俊,等.美国致密油开发现状及启示[J].岩性油气藏,2011,23(4):25-30.Lin Senhu,Zou Caineng,Yuan Xuanjun.Status quo of tight oil exploitation in the United States and its implication[J].Lithologic Reservoirs,2011,23(4):25-30.
[5]邹才能,张光亚,陶士振,等.全球油气勘探领域地质特征、重大发现及非常规石油地质[J].石油勘探与开发,2010,37(2):129-145.Zou Caineng,Zhang Guangya,Tao Shizhen,et al.Geological features,major discoveries and unconventional petroleum geology in the global petroleum exploration[J].Petroleum Exploration and Development,2010,37(2):129-145.
[6]贾承造,邹才能,李建忠,等.中国致密油评价标准、主要类型、基本特征及资源前景[J].石油学报,2012,33(3):343-350.Jiang Chengzao,Zou Caineng,Li Jiangzhong,et al.Assessment criteria,main types,basic features and resource prospects of the tight oil in China[J].Acta Petrolei Sinica,2012,33(3):343-350.
[7]杨华,李士祥,刘显阳.鄂尔多斯盆地致密油、页岩油特征及资源潜力[J].石油学报,2013,34(1):1-11.Yang Hua,Li Shixiang,Liu Xianyang.Characteristics and resourceprospects of tight oil and shale oil in Ordos Basin[J].Acta Petrolei Sinica,2013,34(1):1-11.
[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):657-668.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):657-668.
[9]梁浩,李新宁,马强,等.三塘湖盆地条湖组致密油地质特征及勘探潜力[J].石油勘探与开发,2014,41(5):563-572.Liang Hao,Li Xinning,Ma Qiang,et al.Geological features and exploration potential of Permian Tiaohu Formation tight oil,Santanghu Basin,NW China[J].Petroleum Exploration and Development,2014,41(5):563-572.
[10]汪少勇,李建忠,李登华,等.川中地区公山庙油田侏罗系大安寨段致密油资源潜力分析[J].中国地质,2013,40(2):477-486.Wang Shaoyong,Li Jiangzhong,Li Denghua,et al.The potential of tight oil resource in Jurassic Da’anzhai Formation of the Gongshanmiao oil field,central Sichuan Basin[J].Geology in China,2013,40(2):477-486.
[11]徐梦龙,何治亮,尹伟,等.鄂尔多斯盆地镇泾地区延长组8段致密砂岩储层特征及主控因素[J].石油与天然气地质,2015,36(2):240-247.Xu Menglong,He Zhiliang,Yin Wei,et al.Characteristics and main controlling factors of tight sandstone reservoirs in the 8th member of the Yanchang Formation in Zhenjing area,Ordos Basin[J].Oil&Gas Geology,2015,36(2):240-247.
[12]吴伟涛,邓静,赵靖舟,等.鄂尔多斯盆地华庆地区长7油层组致密油成藏条件与成藏模式[J].石油与天然气地质,2016,37(6):874-881.Wu Weitao,Deng Jing,Zhao Jingzhou,et al.Accumulation conditions and models of tight oil reservoirs in Chang-7 of Huaqing area,the Ordos Basin[J].Oil&Gas Geology,2016,37(6):874-881.
[13]钟玮,林常梅.雅布赖盆地中生代构造特征[J].四川地质学报,2013,33(1):7-11.Zhong Wei,Lin Changmei.Tectonic characteristics of Mesozoic Era in Yabrai Basin[J].Journal of Sichuan Geology,2013,33(1):7-11.
[14]田涛,任战利,马国福,等.雅布赖盆地萨尔台凹陷烃源岩地球化学特征、成熟度演化与油气关系[J].地球物理学进展,2014,29(6):2745-2753.Tian Tao,Ren Zhangli,Ma Guofu,et al.The relations of hydrocarbon generation to the geochemical features and maturity evolution of source rocks in Sartai Sag,Yabrai Basin[J].Progress in Geophysics,2014,29(6):2745-2753.
[15]黄军平,杨克荣,杨占龙,等.雅布赖盆地侏罗系烃源岩特征及油气勘探方向[J].天然气地球科学,2013,24(5):948-955.Huang Junping,Yang Kerong,Yang Zhanlong,et al.Characteristics of Jurassic source rocks and direction of petroleum exploration in Yaburai Basin,China[J].Natural Gas Geoscience,2013,24(5):948-955.
[16]吴晓智,王桂君,郑民,等.雅布赖盆地构造演化与油气聚集[J].地质科学,2015,50(1):74-87.Wu Xiaozhi,Wang Guijun,Zheng Min,et al.Structural evolution and hydrocarbon accumulation in Yaburai Basin[J].Chinese Journal of Geology,2015,50(1):74-87.
[17]王联社,李香平.试论雅布赖盆地砂岩型铀矿成矿前景[J].铀矿地质,2003,19(6):339-343.Wang Lianshe,Li Xiangping.Discussion on metallogenic prospect of sandstone-type uranium deposit in Yaburai basin[J].Uranium Geology,2003,19(6):339-343.
[18]赵宏波.雅布赖盆地中生代构造特征[J].石油化工应用,2011,30(9):71-75.Zhao Hongbo.Basin tectonic characteristics of Mesozoic Era in Yabrai Basin[J].Petrochemical Industry Application,2011,30(9):71-75.
[19]钟福平,钟建华,由伟丰,等.内蒙古雅布赖盆地红柳沟中侏罗统沉积相及沉积环境研究[J].地球科学与环境学报,2010,32(2):149-154.Zhong Fuping,Zhong Jianghua,You Weifeng,et al.Study on sedimentary facies and environment of Middle Jurassic in Hongliugou of Yaburai Basin,Inner Mongolia[J].Journal of Earth Sciences and Environment,2010,32(2):149-154.
[20]吴茂炳,刘春燕,郑孟林,等.内蒙古西部雅布赖盆地侏罗纪沉积-构造演化及油气勘探方向[J].地质通报,2007,26(7):857-864.Wu Maobing,Liu Chunyang,Zheng Menglin,et al.Jurassic depositional-tectonic evolution in the Yaburai Basin,western Inner Mongolia,China and direction of petroleum exploration[J].Geological Bulletin of China,2007,26(7):857-864.
[21]Passey Q R A.Practical model for organic richness from porosity and resistivity logs[J].AAPG Bulletin,1990,74(12):1777-1794.
[22]高岗,王绪龙,柳广弟,等.准噶尔盆地上三叠统源岩TOC含量预测方法[J].高校地质学报,2012,18(4):1-6.Gao Gang,Wang Xulong,Liu Guangdi,et al.Prediction method of organic carbon abundance of dark color mudstones in the Triassic System of Junggar Basin[J].Geological Journal of China Universities,2012,18(4):1-6.
[23]孟元林,申婉琪,周新桂,等.东部盆地群下白垩统烃源岩特征与页岩气勘探潜力[J].石油与天然气地质,2016,37(6):893-902.Meng Yuanlin,Shen Wanqi,Zhou Xingui,et al.Characteristics of the Lower Cretaceous source rocks and shale gas exploration potential of eastern basin group,NE China[J].Oil&Gas Geology,2016,37(6):893-902.