胡力海洼陷九佛堂组上段沉积相特征
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摘要
胡力海洼陷白垩系断陷层九佛堂组是该地区基底大断裂剧烈活动时期沉积的主要含油气层段,相对而言,九佛堂组上段综合条件更好。为明确该层段含油气前景,通过野外仔细观察、测量,结合对测井、录井、岩心、地震剖面等资料的系统研究,对胡力海洼陷九佛堂组上段沉积相特征进行了研究。研究发现,九佛堂组上段发育扇三角洲、近岸水下扇和湖泊3种主要的沉积类型,其中东部缓坡发育扇三角洲,西部陡坡发育近岸水下扇,湖泊分布于近岸水下扇、扇三角洲周边及深洼带中央地带。
In Hulihai Sag,Jiufotang Formation of Cretaceous system is the main part of the oil and gas reservoirs in the sedimentary period of basement fault strenuous activity in the work area.Relatively speaking,the upper member has better general conditions for hydrocarbon accumulation.Based on the field observation and measurement,and combined with the study well logging,core and seismic profiles,it is considered that the sedimentary facies of upper member of Jiufotang Formation in Hulihai Sag can be divided into fan dalta facies,near-shore sub-aqueous fan facies,lacustrine facies.And the fan dalta is in the east gentle slope,near-shore sub-aqueous fan is in the west steep slope,lacustrine is distributed in the near-shore sub-aqueous fan and fan delta around and in the centrel of the deep pool.
In Hulihai Sag,Jiufotang Formation of Cretaceous system is the main part of the oil and gas reservoirs in the sedimentary period of basement fault strenuous activity in the work area.Relatively speaking,the upper member has better general conditions for hydrocarbon accumulation.Based on the field observation and measurement,and combined with the study well logging,core and seismic profiles,it is considered that the sedimentary facies of upper member of Jiufotang Formation in Hulihai Sag can be divided into fan dalta facies,near-shore sub-aqueous fan facies,lacustrine facies.And the fan dalta is in the east gentle slope,near-shore sub-aqueous fan is in the west steep slope,lacustrine is distributed in the near-shore sub-aqueous fan and fan delta around and in the centrel of the deep pool.
引文
[1]田晓玲,汪国文,邹荷丽.钱家店凹陷胡力海洼陷成藏条件分析[J].特种油气藏,2001,8(4):13-16.
[2]Orton G J.A spectrum of middle ordovician fan delta and braid plain deltas[A].North Wales:a consequence of varying fluvial clasticinput[C].Nemec W,Steel RJ,eds.Fan deltas.Springer-Verlag,1988:23-49.
[3]John G.Mcpherson,et al.Fan deltas and braid deltas:conceptual problems[A].Fan deltas[C].Springer-Verlag,1988:14-22.
[4]于兴河,王德发,孙志华.湖泊辫状河三角洲岩相、层序特征及储层地质模型[J].沉积学报,1995,13(1):48-58.
[2]Orton G J.A spectrum of middle ordovician fan delta and braid plain deltas[A].North Wales:a consequence of varying fluvial clasticinput[C].Nemec W,Steel RJ,eds.Fan deltas.Springer-Verlag,1988:23-49.
[3]John G.Mcpherson,et al.Fan deltas and braid deltas:conceptual problems[A].Fan deltas[C].Springer-Verlag,1988:14-22.
[4]于兴河,王德发,孙志华.湖泊辫状河三角洲岩相、层序特征及储层地质模型[J].沉积学报,1995,13(1):48-58.
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