东海平湖油气田潮道砂体垂向特征及平面分布
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摘要
潮道砂体是潮坪沉积体系中重要的储集体之一。以平湖油气田放鹤亭地区平湖组为例,依据岩心、分析化验和测井资料,利用现代沉积和水槽模拟实验,结合地震反演确定潮道砂体垂向和平面特征。研究结果表明,垂向上潮道砂体厚度大、粒度粗,层理特征反应了受潮汐影响的强水动力环境;现代沉积和水槽实验表明平面上潮道呈树状分布,潮道砂体越靠近陆地数量越多、规模越小、宽深比越大,表现为潮道不断分叉、数量多的特点。最后井震结合确立了目的层潮道砂体的展布特征,其结果与现代沉积和水槽实验总结的特征吻合性较好,验证并说明了潮道砂体分布的规律性。
The tidal channel sand body is one of the most important reservoirs in the tidal flat depositional system.Using the modern analogue and flume experiment results as guides,according to the data from coring,analysis,testing,logging and seismic inversion,we established the characteristics of tidal channel sand body both vertically and horizontally for the Pinghu Formation in the Fangheting area of the Pinghu Oil field.The results show that the tidal channel sand body is thick and coarse,with typical beddings formed under strong hydrodynamic conditions in the tidal environment.Modern sedimentary observation and flume experiments indicate that tidal channels are distributed in a dendritic pattern.Towards the land,they become narrower in shape,smaller in scale and larger in widthdepth ratio,indicating the bifurcation of tidal channels.Both seismic and drilling data are used in this case to define the distributional features of tidal channel sand bodies.The results accord well with the modern analogue and the flume experiment results.
The tidal channel sand body is one of the most important reservoirs in the tidal flat depositional system.Using the modern analogue and flume experiment results as guides,according to the data from coring,analysis,testing,logging and seismic inversion,we established the characteristics of tidal channel sand body both vertically and horizontally for the Pinghu Formation in the Fangheting area of the Pinghu Oil field.The results show that the tidal channel sand body is thick and coarse,with typical beddings formed under strong hydrodynamic conditions in the tidal environment.Modern sedimentary observation and flume experiments indicate that tidal channels are distributed in a dendritic pattern.Towards the land,they become narrower in shape,smaller in scale and larger in widthdepth ratio,indicating the bifurcation of tidal channels.Both seismic and drilling data are used in this case to define the distributional features of tidal channel sand bodies.The results accord well with the modern analogue and the flume experiment results.
引文
[1]陈琳琳.东海西湖凹陷平湖组海进潮道砂体成因分析[J].海洋石油,2000,104(2):15-21.
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[10]张建培,徐发,钟韬,等.东海陆架盆地西湖凹陷平湖组—花港组层序地层模式及沉积演化[J].海洋地质与第四纪地质,2012,32(1):35-41.
[11]陈琳琳.东海西湖凹陷平湖组沉积环境演化[J].海洋地质与第四纪地质,1998,18(4):69-78.
[12]Lorenz J C,Heinze D M,Clark J A,et al.Determination of widths of meander-belt sandstone reservoirs from vertical down hole data,Mesaverde Group,Piceance Creek basin,Colorado[J].AAPG Bulletin,1985,69:710-721.
[13]Brigitte M,Vlaswinkel,Alessandro C.Geometric characteristics and evolution of a tidal channel network in experimental setting[J].Earth Surface Processes and Landforms,2011,36,739-752.
[2]赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001:284-291.
[3]赵丽娜,陈建文,张银国,等.东海西湖凹陷平湖构造带平湖组沉积特征[J].世界地质,2008,27(1):42-47.
[4]林志强,周平.东海西湖凹陷新生界沉积相的演化[J].海洋地质与第四纪地质,1994,14(2):63-70.
[5]刘书会,王宝言,刘成鑫.西湖凹陷平湖地区平湖组沉积相的再认识[J].油气地质与采收率,2009,16(3):42-47.
[6]武法东,周平,苏新,等.东海陆架盆地西湖凹陷第三系层序地层与沉积体系分析[M].北京:地质出版社,2000:7283.
[7]陈琳琳,练铭祥.东海西湖凹陷平湖组储层成因特征及评价[J].海洋石油,1999,102(4):7-13.
[8]刘成鑫.东海平湖油气田平湖组沉积相研究[J].海洋石油,2009,30(2):9-13.
[9]李上卿.东海西湖凹陷新生代地质构造特征与演化[J].海洋石油,2000,104(2):8-14.
[10]张建培,徐发,钟韬,等.东海陆架盆地西湖凹陷平湖组—花港组层序地层模式及沉积演化[J].海洋地质与第四纪地质,2012,32(1):35-41.
[11]陈琳琳.东海西湖凹陷平湖组沉积环境演化[J].海洋地质与第四纪地质,1998,18(4):69-78.
[12]Lorenz J C,Heinze D M,Clark J A,et al.Determination of widths of meander-belt sandstone reservoirs from vertical down hole data,Mesaverde Group,Piceance Creek basin,Colorado[J].AAPG Bulletin,1985,69:710-721.
[13]Brigitte M,Vlaswinkel,Alessandro C.Geometric characteristics and evolution of a tidal channel network in experimental setting[J].Earth Surface Processes and Landforms,2011,36,739-752.
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