松辽盆地北部浅层层序地层划分与油气特征
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摘要
根据盆地及构造演化特征,同时结合地震、钻井等基础资料,确定了松辽盆地北部上白垩统四方台组和明水组层序地层的划分方案,分析了四方台组和明水组内的层序构型和内部沉积特征,松辽盆地在晚白垩世处于挤压环境下湖盆萎缩时期的沉积,主要发育河流和泛滥平原相沉积,局部发育滨浅湖、三角洲相沉积,沉积物以红褐色、绿色和灰白色为主,整体反映了氧化-半氧化环境。另外四方台组发育的河道砂岩可以作为良好的储层,同时多期断裂的活动又连通了下覆的油气,为浅层的油气成藏提供了充足的油源,其上层序Ⅰ晚期广泛发育的厚层泥岩有效的防止了下覆油气的散失。松辽盆地北部浅层复杂的构造运动和有效的储盖组合,使得该层位具备油气勘探的潜力。
Based on basin structural evolution characters,combining seismic and drilling data,sequence stratigraphy classification criterion of Sifangtai formation and Mingshui formation,upper Crataceous,north Songliao basin,is confirmed,also,the sequence configuration and inner sedimentary character of Sifangtai formation and Mingshui formation are analyzed.Songliao basin was in a press environment in Late Crataceous period,fluvial facies and flood plain facies are mainly developed,shallow lake and delta facies only occurred in local area.Sediments are mainly mahogany,green and off-white,which reflect oxidized and half-oxidized environment.On the other hand,the channel sand developed in Sifangtai formation can be favorable reservoir.In the same time,multiple phase fracture movement connects subjacent hydrocarbon,which provides rich oil sources for shallow layer oil accumulation.Argillite,widely developed in the late period of sequence Ⅰ,can effectively protect subjacent hydrocarbon.Complicated tectonic movement and effective accumulation-cap rock combination of shallow layer,north Songliao basin,make this layer possess potentiality of exploration activity.
Based on basin structural evolution characters,combining seismic and drilling data,sequence stratigraphy classification criterion of Sifangtai formation and Mingshui formation,upper Crataceous,north Songliao basin,is confirmed,also,the sequence configuration and inner sedimentary character of Sifangtai formation and Mingshui formation are analyzed.Songliao basin was in a press environment in Late Crataceous period,fluvial facies and flood plain facies are mainly developed,shallow lake and delta facies only occurred in local area.Sediments are mainly mahogany,green and off-white,which reflect oxidized and half-oxidized environment.On the other hand,the channel sand developed in Sifangtai formation can be favorable reservoir.In the same time,multiple phase fracture movement connects subjacent hydrocarbon,which provides rich oil sources for shallow layer oil accumulation.Argillite,widely developed in the late period of sequence Ⅰ,can effectively protect subjacent hydrocarbon.Complicated tectonic movement and effective accumulation-cap rock combination of shallow layer,north Songliao basin,make this layer possess potentiality of exploration activity.
引文
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[10]郑玉龙,陈春瑞,任林伟.松辽盆地上白垩统陆相遗迹化石及其沉积环境[J].古地理学报,2005,7(3):337-345.
[2]林春花,陈均亮,包丽.新构造活动对松辽盆地含油气系统的影响[J].大庆石油地质与开发,2001,20(4):12-14.
[3]任延广,陈均亮,冯志强,等.喜山运动对松辽盆地含油气系统的影响[J].石油与天然气地质,2004,25(2):185-190.
[4]侯贵廷,冯大晨,王文明,等.松辽盆地的反转构造作用及其对油气成藏的影响[J].石油与天然气地质,2004,25(1):49-53.
[5]刘振武.松辽盆地北部构造回返期的油气藏[J].江苏地质,2005,29(3):143-146.
[6]魏魁生,徐怀大,叶淑芬.松辽盆地白垩系高分辨率层序地层格架[J].石油与天然气地质,1997,18(1):7.
[7]焦养泉,周海民,刘少峰,等.断陷盆地多层次幕式裂陷作用与沉积充填响应——以南堡老第三纪断陷盆地为例[J].地球科学,1996,21(6):633-635.
[8]胡望水,吕炳全,张文军,等.松辽盆地构造演化及成盆动力学探讨[J].地质科学,2005,40(1):16-31.
[9]张文军,胡望水,官大勇,等.松辽裂陷盆地反转期构造分析[J].中国海上油气,2004,16(4):230-234.
[10]郑玉龙,陈春瑞,任林伟.松辽盆地上白垩统陆相遗迹化石及其沉积环境[J].古地理学报,2005,7(3):337-345.
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