二连盆地下白垩统岩性地层油藏构造控制因素
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摘要
根据地震、测井及钻井信息和层序地层学理论,对二连盆地岩性地层油气藏类型进行的深入研究表明,影响二连盆地下白垩统岩性地层油藏的主要因素有断陷结构的类型、坡折带控砂模式和断裂调节带类型。根据构造样式,将二连盆地断陷结构进一步细分为单断断超式、单断断槽式及复合式3种类型;将坡折带控砂模式细分为陡坡断崖型与近岸水下扇、陡坡断坡型与近岸水下扇—浊积扇、陡坡断阶型与扇三角洲—浊积扇、缓坡斜坡型与辫状河三角洲—扇三角洲、缓坡挠曲型与扇三角洲—浊积扇、缓坡断阶型与辫状河三角洲或扇三角洲—浊积扇6种类型;将断裂调节带划分为断层断弯型、断层断接型、断层交叉型和断沟型4种类型。对不同类型构造控制因素进行了分析,为二连盆地岩性地层油藏的研究和勘探提供了理论依据。
On the basis of seismic,logging and drilling information,the property of the stratigraphic and lithologic reservoirs in the Lower Cretaceous of Erlian Basin were analyzed with the sequence stratigraphy.Three factors for controlling the structure of those reservoirs include the rift structures,the sand control patterns of slope break and the fault-transfer zones,which influence petroleum accumulation in this area.The rift structure can be divided into three types of single fault overlap,single fault trough and complex type.The slope break has six patterns,including steep slope fault scrap and nearshore subaqueous fans,steep slope fault ramp and nearshore subaqueous fans and turbidite fans,steep slope fault bench and fan-delta and turbidite fans,gentle slope and braided river delta and fan-delta,gentle slope flexure and fan-delta and turbidite fans,and gentle slope fault bench and braided river delta or fan-delta and turbidite fans.There are four types faults-transfer zones in Erlian Basin,such as fault bend type,fault fracture type,fault intersection type and fault trace rift type.The analyses of different factors for controlling the structures can provide some information for exploring of stratigraphic and lithologic reservoirs in Erlian Basin.
On the basis of seismic,logging and drilling information,the property of the stratigraphic and lithologic reservoirs in the Lower Cretaceous of Erlian Basin were analyzed with the sequence stratigraphy.Three factors for controlling the structure of those reservoirs include the rift structures,the sand control patterns of slope break and the fault-transfer zones,which influence petroleum accumulation in this area.The rift structure can be divided into three types of single fault overlap,single fault trough and complex type.The slope break has six patterns,including steep slope fault scrap and nearshore subaqueous fans,steep slope fault ramp and nearshore subaqueous fans and turbidite fans,steep slope fault bench and fan-delta and turbidite fans,gentle slope and braided river delta and fan-delta,gentle slope flexure and fan-delta and turbidite fans,and gentle slope fault bench and braided river delta or fan-delta and turbidite fans.There are four types faults-transfer zones in Erlian Basin,such as fault bend type,fault fracture type,fault intersection type and fault trace rift type.The analyses of different factors for controlling the structures can provide some information for exploring of stratigraphic and lithologic reservoirs in Erlian Basin.
引文
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[8]陈发景.调节带(或传递带)的基本概念和分类[J].现代地质,2003,17(2):186.Chen Fajing.The concept and category of transfer zone[J].Geo-science,2003,17(2):186.
[9]李思田,潘元林,陆永潮,等.断陷湖盆隐蔽油藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J].地球科学——中国地质大学学报,2002,27(5):592-598.Li Sitian,Pan Yuanlin,Lu Yongchao,et al.Key technology ofprospecting and exploration of subtle traps in lacustrine fault ba-sins:Sequence stratigraphic researches on the basis of high reso-lution seismic survey[J].Earth Science:Journal of China Univer-sity of Geosciences,2002,27(5):592-598.
[10]冯有良.断陷盆地层序格架中岩性地层油气藏分布特征[J].石油学报,2005,26(4):17-22.Feng Yongliang.Distribution of stratigraphic and lithologic res-ervoirs in sequence framework of rift-subsidence basin[J].ActaPetrolei Sinica,2005,26(4):17-22.
[11]冯有良.断陷湖盆沟谷及构造坡折对砂体的控制作用[J].石油学报,2006,27(1):13-16.Feng Yongliang.Control of valley and tectonic slope-break zoneon sand bodies in rift-subsidence basin[J].Acta Petrolei Sinica,2006,27(1):13-16.
[2]杜金虎,易士威,张以明,等.二连盆地隐蔽油藏勘探[M].北京:石油工业版社,2003:89-92.Du Jinhu,Yi Shiwei,Zhang Yiming,et al.Exploration of subtleoil reservoir in Erlian Basin[M].Beijing:Petroleum IndustryPress,2003:89-92.
[3]祝玉衡,张文朝,王洪生,等.二连盆地下白垩统沉积相及含油性[M].北京:科学出版社,2000:211-212.Zhu Yuheng,Zhang Wenchao,Wang Hongsheng,et al.Deposi-tional feature and oil bearing feature in Lower Cretaceous in Er-lian Basin[M].Beijing:Science Press,2000:211-212.
[4]张文朝,祝玉衡,姜冬华,等.二连盆地“洼槽”控油规律与油气勘探前景[J].石油学报,1997,18(4):25-31.Zhang Wenchao,Zhu Yuheng,Jiang Donghua,et al.The law ofoil controlled by subsags and prospect of petroleum explorationin Erlian Basin[J].Acta Petrolei Sinica,1997,18(4):25-31.
[5]易士威.断陷盆地岩性地层油藏分布特征[J].石油学报,2005,26(1):38-41.Yi Shiwei.Distribution features of lithologic and stratigraphicreservoirs in fault-depression basin[J].Acta Petrolei Sinica,2005,26(1):38-41.
[6]易士威,王元杰,钱铮.二连盆地乌里雅斯太凹陷油气成藏模式及分布特征[J].石油学报,2006,27(3):27-31.Yi Shiwei,Wang Yuanjie,Qian Zheng.Forming pattern and dis-tribution features of hydrocarbon reservoir in Wuliyasitai Sag ofErlian Basin[J].Acta Petrolei Sinica,2006,27(3):27-31.
[7]邓宏文,王红亮,王敦刚.古地貌对陆相裂谷盆地层序充填特征的控制——以渤中凹陷西斜坡区下第三系为例[J].石油与天然气地质,2001,22(4):293-296.Deng Hongwen,Wang Hongliang,Wang Dungang.Control ofpaleo-morphology to stratigraphic sequence in continental riftbasins:Take lower Tertiary of western slope in Bozhong Depres-sion as an example[J].Oil&Gas Geology,2001,22(4):293-296.
[8]陈发景.调节带(或传递带)的基本概念和分类[J].现代地质,2003,17(2):186.Chen Fajing.The concept and category of transfer zone[J].Geo-science,2003,17(2):186.
[9]李思田,潘元林,陆永潮,等.断陷湖盆隐蔽油藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J].地球科学——中国地质大学学报,2002,27(5):592-598.Li Sitian,Pan Yuanlin,Lu Yongchao,et al.Key technology ofprospecting and exploration of subtle traps in lacustrine fault ba-sins:Sequence stratigraphic researches on the basis of high reso-lution seismic survey[J].Earth Science:Journal of China Univer-sity of Geosciences,2002,27(5):592-598.
[10]冯有良.断陷盆地层序格架中岩性地层油气藏分布特征[J].石油学报,2005,26(4):17-22.Feng Yongliang.Distribution of stratigraphic and lithologic res-ervoirs in sequence framework of rift-subsidence basin[J].ActaPetrolei Sinica,2005,26(4):17-22.
[11]冯有良.断陷湖盆沟谷及构造坡折对砂体的控制作用[J].石油学报,2006,27(1):13-16.Feng Yongliang.Control of valley and tectonic slope-break zoneon sand bodies in rift-subsidence basin[J].Acta Petrolei Sinica,2006,27(1):13-16.
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