梨树断陷营城组二段物源体系特征及其对储层物性的影响
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摘要
物源很大程度上影响梨树断陷营城组储层的物性.利用现存古地貌宏观划分物源区和沉积区,根据碎屑岩轻、重矿物组分组合特征划分物源区块,依据砂砾岩含量等值线图精细描绘古水流流向;利用地层倾角测井和地震反射特征定量分析碎屑物质在湖盆内的进积方向,对梨树断陷营二段物源体系进行精细研究.结果表明:梨树断陷营二段物源体系具有同源同质、多源并存、混源沉积的特征,在东部斜坡、北部斜坡和西北存在3个主要物源区;在盆地西北角苏家屯地区存在一个分布范围较小的次要物源区,沉积物由太平沟凸起提供.物源对储层物性的影响体现为先天沉积母质和后期成岩作用的差异性.
The problem of provenance is an important aspect which restricts the exploration of Lishu fault depression and affects its reservoir's physical property.This paper analyzes in detail the provenance system of Ying2 member in Lishu fault depression from various angles:the source area and the deposition area are distinguished according to palaeogeomorphology;the source block is determined according to the characteristics of light mineral and heavy mineral assemblage;the direction of ancient water is described according to gravel content percent;the direction of transporting clastic in the basin is described according to dip logging and seismic reflection characteristics.The research results show that the provenance systems have some features such as homologous homogeneity,multi-source coexist and the deposition of mixed source.There are three source blocks of Ying2 member in Lishu fault depression.The source blocks are the eastern slope,the northern slope and the northwest slope.Besides,another source block which is small exists in the northwest corner.The region of Su Jiatun,of the basin.The deposits are provided by Tai Pinggou projection.The effects on reservoir's physical property from source system mainly reflect on the differences of sediment and diagenesis.
The problem of provenance is an important aspect which restricts the exploration of Lishu fault depression and affects its reservoir's physical property.This paper analyzes in detail the provenance system of Ying2 member in Lishu fault depression from various angles:the source area and the deposition area are distinguished according to palaeogeomorphology;the source block is determined according to the characteristics of light mineral and heavy mineral assemblage;the direction of ancient water is described according to gravel content percent;the direction of transporting clastic in the basin is described according to dip logging and seismic reflection characteristics.The research results show that the provenance systems have some features such as homologous homogeneity,multi-source coexist and the deposition of mixed source.There are three source blocks of Ying2 member in Lishu fault depression.The source blocks are the eastern slope,the northern slope and the northwest slope.Besides,another source block which is small exists in the northwest corner.The region of Su Jiatun,of the basin.The deposits are provided by Tai Pinggou projection.The effects on reservoir's physical property from source system mainly reflect on the differences of sediment and diagenesis.
引文
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[2]刘福春,王德海.松辽盆地东南隆起区十屋断陷油气聚集规律[J].油气地质与采收率,2001,8(2):14-17.
[3]张玉明.松辽盆地南部十屋断陷北部深层油气成藏条件[J].石油天然气学报,2006,26(3):53-56.
[4]冯晓辉,胡杨.松辽盆地梨树断陷构造特征及有利区带分析[J].内蒙古石油化工,2011(13):148-150.
[5]李彦芳,李国慧,窦慧,等.陆源碎屑湖盆物源恢复的统计分析方法及其应用[J].大庆石油学院学报,1992,16(2):115-120.
[6]张雷,卢双舫,张雪娟,等.大庆长垣以东地区泉头组三、四段重矿物特征及沉积体系分析[J].大庆石油学院学报,2010,34(1):10-13.
[7]朱筱敏,信荃麟.利用地震前积反射前积结构确定古水流体系[J].石油大学学报:自然科学版,1989,13(1):9-14.
[8]蒲仁海.前积反射的地质解释[J].石油地球物理勘探,1994,29(4):490-497.
[9]张金伟,王军,吴明荣.利用地震前积反射特征确定古水流方向的沉积几何方法[J].油气地质与采收率,2008,15(5):53-55.
[10]李洪奇.沉积学研究中的地层倾角测井资料解释[J].沉积学报,1995,13(1):82-87.
[11]周磊.梨树断陷十屋油田营城组物源体系、沉积特征及储层特征研究[D].青岛:中国石油大学(华东),2010.
[12]张鑫.松辽盆地南部泉四段物源判别与沉积特征[J].大庆石油学院学报,2011,35(5):16-21.
[13]文慧俭,马世忠,丁日新,等.兴城气田营四段砾岩储层岩石学特征与物源分析[J].大庆石油学院学报,2008,32(3):98-100.
[14]贺静,冯胜斌,黄静,等.物源对鄂尔多斯盆地中部延长组长6砂岩孔隙发育的控制作用[J].沉积学报,2011,29(1):80-87.
[15]王洪建,吴小斌,孙卫,等.陇东地区延长组长3、长4+5储层物源及其对储层物性的影响[J].地球科学与环境学报,2008,30(1):38-43.
[16]黄传炎,王华,等.北塘凹陷古近系沙河街组三段物源体系分析[J].地球科学:中国地质大学学报,2009,34(6):975-984.
[17]赵俊兴,吕强,李凤杰,等.鄂尔多斯盆地南部延长组长6时期物源状况分析[J].沉积学报,2008,26(4):610-616.
[18]武法东,陆永潮,阮小燕,等.重矿物聚类分析在物源分析及地层对比中的应用:以东海陆架盆地西湖凹陷平湖地区为例[J].现代地质,1966,10(3):397-403.
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