莱州湾凹陷河流沉积地貌形态对储层物性的影响
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摘要
渤海莱州湾凹陷高精度三维地震数据体为其地震地貌学研究提供了可靠数据基础。通过对该区明化镇组下段的地震地貌学迭代研究,不但能在地震切片上识别出河流沉积单元形态,还可预测其储层物性分布。共识别出四个期次河道形态,测量了75处河道宽度。河道宽度的概率累积分布为储层规模评估和井距设计提供了尺度约束。采用地震相约束的多属性分析方法预测出明化镇组下段的砂体厚度、孔隙度、渗透率和含油饱和度等四个主要储层物性参数;再将此四个储层物性参数与河道形态做叠合分析,发现砂体厚度显著受单一河道形态和规模的影响,孔隙度、渗透率和含油饱和度等三参数也与各期次河道形态的分布相关联。从综合评价看,一定规模的河道分布区域,其四个储层物性参数值均优,将是明化镇组下段优先开发区域。
High-quality 3D seismic data provides a reliable base of information for seismic geomorphology study in Laizhouwan Sag.By comprehensive iterated studies of seismic geomorphology,depositional elements were identified,and consequently reservoir distribution in the area is predicted.Channel sand images of four fluvial phases are traced,and channel widths are measured at 75 points alone the channel.These channel widths might control reservoir scale.Using multi-attribute patterns constrained by seismic facies,we calculate four reservoir characteristics including sandstone thickness,porosity,permeability and oil saturation in Minghuazhen Formation.And then,we superimpose reservoir characteristics on channel morphology.We find out that sand thickness is obviously controlled by channel morphology.The porosity,permeability and oil saturation are controlled by the four fluvial phases.In inner channels,channel widths are larger and four reservoir parameter values are higher.Based on the comprehensive evaluation,channel areas are considered as favorable reservoirs for the next step exploration and development in Minghuazhen Formation.
High-quality 3D seismic data provides a reliable base of information for seismic geomorphology study in Laizhouwan Sag.By comprehensive iterated studies of seismic geomorphology,depositional elements were identified,and consequently reservoir distribution in the area is predicted.Channel sand images of four fluvial phases are traced,and channel widths are measured at 75 points alone the channel.These channel widths might control reservoir scale.Using multi-attribute patterns constrained by seismic facies,we calculate four reservoir characteristics including sandstone thickness,porosity,permeability and oil saturation in Minghuazhen Formation.And then,we superimpose reservoir characteristics on channel morphology.We find out that sand thickness is obviously controlled by channel morphology.The porosity,permeability and oil saturation are controlled by the four fluvial phases.In inner channels,channel widths are larger and four reservoir parameter values are higher.Based on the comprehensive evaluation,channel areas are considered as favorable reservoirs for the next step exploration and development in Minghuazhen Formation.
引文
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[12]王治国,尹成,蒋志斌等.渤海莱州湾凹陷明化镇组下段河道储层的地震地貌分析.石油地球物理勘探,2012,47(4):629～636Wang Zhiguo,Yin Cheng,Jiang Zhibin et al.Seismicgeomorphology of channel reservoir of Lower Ming-huazhen formation,Laizhouwan Sag,Bohai Bay,Chi-na.OGP,2012,47(4):629～636
[13]王治国,尹成,雷小兰等.预测砂岩孔隙度的地震多属性优化模式对比.石油地球物理勘探,2011,46(3):442～448Wang Zhiguo,Yin Cheng,Lei Xiaolan et al.Multi-attribute optimization analysis for sandstone porosityprediction.OGP,2011,46(3):442～448
[14]尹成,王治国,雷小兰等.地震相约束的多属性储层预测方法研究.西南石油大学学报(自然科学版),2010,32(5):173～180Yin Cheng,Wang Zhiguo,Lei Xiaolan et al.Multi-attribute reservoir prediction method under restraintof seismic facies.Journal of Southwest Petroleum U-niversity(Science&Technology Edition),2010,32(5):173～180
[15]Hubbard S M,Smith D G,Nielsen H et al.Seismicgeomorphology and sedimentology of a tidally influ-enced river deposit,Lower Cretaceous Athabasca oilsands,Alberta,Canada.AAPG Bulletin,2011,95(7):1123～1145
[2]杨波,牛成民,孙和风等.莱州湾凹陷垦利10-1亿吨级油田发现的意义.中国海上油气,2011,23(3):148～153Yang Bo,Niu Chengmin,Sun Hefeng et al.The sig-nificance of discovering Kenli 10-1oilfield in 108ton-reserves grade in Laizhouwan sag.China OffshoreOil and Gas,2011,23(3):148～153
[3]朱伟林,李建平,周心怀等.渤海新近系浅水三角洲沉积体系与大型油气田勘探.沉积学报,2008,26(4):575～582Zhu Weilin,Li Jianping,Zhou Xinhuai et al.Neogeneshallow water deltaic system and large hydrocarbonaccumulations in Bohai Bay,China.Acta Sedimento-logica Sinica,2008,26(4):575～582
[4]Brown A R,Dahm C G,Graebner R J.A stratigraphiccase history using three-dimensional seismic data inthe Gulf of Thailand.Geophysical Prospecting,1981,29(3):327～349
[5]Posamentier H W,Kolla V.Seismic geomorphologyand stratigraphy of depositional elements in deepwa-ter settings.Journal of Sedimentary Research,2003,73(3):367～388
[6]Davies R J,Posamentier H W,Wood L J et al(eds).Seismic Geomorphology:Application to Hydrocar-bon Exploration and Production.London:GeologicalSociety Special Publication 277,2007
[7]Wood L J,Simo T T,Rosen N C(eds).Seismic Ima-ging of Depositional and Geomorphic Systems:30thAnnual GCSSEPM Foundation Bob F Perkins Re-search Conference 2010.Houston:Curran AssociatesInc,2011
[8]Gee M J R,Gawthorpe R L,Bakke K et al.Seismicgeomorphology and evolution of submarine channelsfrom the Angolan continental margin.Journal ofSedimentary Research,2007,77(5):433～446
[9]Wood L J.Quantitative seismic geomorphology ofPliocene and Miocene fluvial systems in the northernGulf of Mexico,U S A.Journal of Sedimentary Re-search,2007,77(9):713～730
[10]Carter D C.3-D seismic geomorphology:Insights intofluvial reservoir deposition and performance,Widurifield,Java Sea.AAPG Bulletin,2003,87(6):909～934
[11]Cross N E,Cunningham A,Cook R J et al.Three-di-mensional seismic geomorphology of a deep-waterslope-channel system:The Sequoia field,offshore westNile Delta,Egypt.AAPG Bulletin,2009,93(8):1063～1086
[12]王治国,尹成,蒋志斌等.渤海莱州湾凹陷明化镇组下段河道储层的地震地貌分析.石油地球物理勘探,2012,47(4):629～636Wang Zhiguo,Yin Cheng,Jiang Zhibin et al.Seismicgeomorphology of channel reservoir of Lower Ming-huazhen formation,Laizhouwan Sag,Bohai Bay,Chi-na.OGP,2012,47(4):629～636
[13]王治国,尹成,雷小兰等.预测砂岩孔隙度的地震多属性优化模式对比.石油地球物理勘探,2011,46(3):442～448Wang Zhiguo,Yin Cheng,Lei Xiaolan et al.Multi-attribute optimization analysis for sandstone porosityprediction.OGP,2011,46(3):442～448
[14]尹成,王治国,雷小兰等.地震相约束的多属性储层预测方法研究.西南石油大学学报(自然科学版),2010,32(5):173～180Yin Cheng,Wang Zhiguo,Lei Xiaolan et al.Multi-attribute reservoir prediction method under restraintof seismic facies.Journal of Southwest Petroleum U-niversity(Science&Technology Edition),2010,32(5):173～180
[15]Hubbard S M,Smith D G,Nielsen H et al.Seismicgeomorphology and sedimentology of a tidally influ-enced river deposit,Lower Cretaceous Athabasca oilsands,Alberta,Canada.AAPG Bulletin,2011,95(7):1123～1145
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