贝尔凹陷关键层序识别与油气意义
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摘要
在充分消化、吸收贝尔凹陷现存多套地层划分对比方案基础上,综合参考岩性特征、电性特征、三维地震界面特征及孢粉组合特征,从建立贝尔-南贝尔-塔南凹陷层序格架出发,将贝尔凹陷铜钵庙-南屯组划分为4个三级层序。其中该次识别的关键层序——SQn41沉积时期构造运动相对平静,主要发育扇三角洲、湖泊及湖底扇等沉积类型,在海塔盆地具有良好的对比性。SQn41层序的发现使得建立海塔盆地等时区域地层格架成为可能。
On the basis of research of many sets of available stratigraphic division planes,the lithologic,electric logging,and 3Dseismic interfacial and sporopollen assemblage characters were integrally studied.The sequence framework was established for Bei'er-Beinan-Tanan Sag.Based on previous stratigraphic classification and correlation,it was proposed that Tongbomiao-Nantun Formation in Bei'er Sag was divided into 4third-order sequences.SQn 4 1 was the key sequence recognized in this paper,and it was formed without intense tectonic movement.Fan delta,lacustrine,and sublacustrine fan deposits were mainly developed in the sequence.The characteristics of these depositional systems can be correlated well within Haita Basin.The reorganization of SQn 4 1 enables the establishment of sequence stratigraphic framework in Haita Basin and it further requires a new classification of sediment and reservoir units.
On the basis of research of many sets of available stratigraphic division planes,the lithologic,electric logging,and 3Dseismic interfacial and sporopollen assemblage characters were integrally studied.The sequence framework was established for Bei'er-Beinan-Tanan Sag.Based on previous stratigraphic classification and correlation,it was proposed that Tongbomiao-Nantun Formation in Bei'er Sag was divided into 4third-order sequences.SQn 4 1 was the key sequence recognized in this paper,and it was formed without intense tectonic movement.Fan delta,lacustrine,and sublacustrine fan deposits were mainly developed in the sequence.The characteristics of these depositional systems can be correlated well within Haita Basin.The reorganization of SQn 4 1 enables the establishment of sequence stratigraphic framework in Haita Basin and it further requires a new classification of sediment and reservoir units.
引文
[1]渠永宏,廖远慧,赵利华,等.高分辨率层序地层学在断陷盆地中的应用——以海拉尔盆地贝尔断陷为例[J].石油学报,2006,27(增刊):31～37.
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[3]纪友亮,曹瑞成,蒙启安,等.塔木察格盆地塔南凹陷下白垩统层序结构特征及控制因素分析[J].地质学报,2009,83(6):827～835.
[4]单敬福,王峰,孙海雷,等.同沉积构造组合模式下的沉积层序特征及其演化[J].地质论评,2010,56(3):426～439.
[5]Wang Ya-ning,Bao Zhi-dong,Peng Shi-mi,et al.Sedimentary and reservoir characteristics of fan delta of Nan1formation in BeizhongOilfield,Hailar Basin[J].Progress in Environmental Science and Engineering,2012,356～360:2925～2928.
[2]雷燕平,林畅松,刘景彦,等.贝尔凹陷下白垩统构造对沉积充填和砂体分布的控制[J].石油天然气学报,2008,30(2):25～29.
[3]纪友亮,曹瑞成,蒙启安,等.塔木察格盆地塔南凹陷下白垩统层序结构特征及控制因素分析[J].地质学报,2009,83(6):827～835.
[4]单敬福,王峰,孙海雷,等.同沉积构造组合模式下的沉积层序特征及其演化[J].地质论评,2010,56(3):426～439.
[5]Wang Ya-ning,Bao Zhi-dong,Peng Shi-mi,et al.Sedimentary and reservoir characteristics of fan delta of Nan1formation in BeizhongOilfield,Hailar Basin[J].Progress in Environmental Science and Engineering,2012,356～360:2925～2928.
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