元坝须家河组须三段沉积厚度的控制因素
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摘要
对元坝地区高分辨率地震资料进行了层位解释,分析了波阻抗特征、地震波反射结构、同相轴平面展布,结合地质资料,认为须家河组中部泥岩段向南东减薄原因为现通南巴构造带在须家河组须三段沉积时期有过活动,即发育生长背斜,而向西厚度剧增的原因还有盆地的持续凹陷使西部水体持续变深。
In this paper,a horizontal interpretation is carried out for high-resolution seismic data of Yuanba area.Moreover,the wave impedance characteristics,seismic-wave reflection configuration and event planar distribution are analyzed.It is considered that for the current Tongnanba structural belt,there maybe some activities during the deposition of Xujiahe 3 Member,including the developed growth anticline,to bring about a southeastward thinning for shale segment in middle Xujiahe Formation.In addition,why the shale segment occurred an abrupt increase westward is a continue depression of basin to make western waterbody deepen without an interruption.
In this paper,a horizontal interpretation is carried out for high-resolution seismic data of Yuanba area.Moreover,the wave impedance characteristics,seismic-wave reflection configuration and event planar distribution are analyzed.It is considered that for the current Tongnanba structural belt,there maybe some activities during the deposition of Xujiahe 3 Member,including the developed growth anticline,to bring about a southeastward thinning for shale segment in middle Xujiahe Formation.In addition,why the shale segment occurred an abrupt increase westward is a continue depression of basin to make western waterbody deepen without an interruption.
引文
[1]林良彪,陈洪德.四川盆地西部须家河组砂岩组分及其古地理探讨[J].石油实验地质,2006,28(6):511-517.
[2]姬惠敏,罗啸泉.川西三叠系含气系统特征及勘探目标分析[J].天然气勘探与开发,25(2):13-20.
[3]张虹.川西致密碎屑岩气藏描述的物探方法技术[J].石油物探,2002,41(增刊):253-260.
[4]郑荣才,戴朝成.四川类前陆盆地须家河组层序—岩相古地理特征[J].地质论评,2009,55(4):484-495.
[2]姬惠敏,罗啸泉.川西三叠系含气系统特征及勘探目标分析[J].天然气勘探与开发,25(2):13-20.
[3]张虹.川西致密碎屑岩气藏描述的物探方法技术[J].石油物探,2002,41(增刊):253-260.
[4]郑荣才,戴朝成.四川类前陆盆地须家河组层序—岩相古地理特征[J].地质论评,2009,55(4):484-495.
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