南堡1-1区东一段浅水三角洲水下分流河道单砂体叠置关系
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摘要
综合应用岩心、测井、生产动态等资料,完成了南堡1-1区东一段储层水下分流河道单砂体的划分。通过总结单一水下分流河道砂体间的接触关系,分析了研究区水下分流河道叠置特征及其形成原因。研究结果表明:南堡1-1区水下分流河道单砂体厚度5. 2～11. 5 m,宽度最大可达400 m;单一水下分流河道砂体在剖面上存在分离式、叠加式、切叠式3种接触关系,以分离式为主;平面上存在分离式、相变式、对接式、切割式4种接触关系,以切割式为主;在空间上可组合成12种基本接触类型,占比由大到小依次为分离+切割、叠加+切割、叠加+对接、切叠+切割等;湖泊水体周期性变化、可容纳空间与沉积物供给通量比值(A/S)、动态地貌形态变化等因素共同形成了研究区浅水三角洲前缘水下分流河道砂体剖面下切能力有限而平面频繁改道交切的特征。
With the help of the comprehensive application of the core,well logging,production performance data and so on,the classification was performed for the single sandbodies in the under-water distributary channel of Member Ed1 reservoir in Block Nanpu1-1. By means of the summarized contact relationships between the single sandbodies in the underwater distributary channel,the superimposition characteristics and forming causes were analyzed for the channel stated above in the study area. The study results show that the thickness of the single sandbody in the block is in the range from 5. 2 m to 11. 5 m and the maximal width is 400 m; there are three vertical contact patterns of the single sandbodies,including the separated type,overlap-type and cut-overlay type,the former is the main mode; there are four lateral contact patterns,including the separated type,facies change type,butt-joint type and cut type,the latter is the main type; there are 12 basic contact types in space which can be combined,the occupied proportion from big to small is the separated + cut types,overlap+cut types,overlap+ butt-joint types,cut-overlap + cut types and so forth; periodically changes of the lake body,A/S,dynamic geomorphology are the main factor which altogether make the characteristics of limited low-cutting capacity in the section and frequent diversions in the plane for the sandbodies in the underwater distributary channel of the shallow-water delta front in the study area.
With the help of the comprehensive application of the core,well logging,production performance data and so on,the classification was performed for the single sandbodies in the under-water distributary channel of Member Ed1 reservoir in Block Nanpu1-1. By means of the summarized contact relationships between the single sandbodies in the underwater distributary channel,the superimposition characteristics and forming causes were analyzed for the channel stated above in the study area. The study results show that the thickness of the single sandbody in the block is in the range from 5. 2 m to 11. 5 m and the maximal width is 400 m; there are three vertical contact patterns of the single sandbodies,including the separated type,overlap-type and cut-overlay type,the former is the main mode; there are four lateral contact patterns,including the separated type,facies change type,butt-joint type and cut type,the latter is the main type; there are 12 basic contact types in space which can be combined,the occupied proportion from big to small is the separated + cut types,overlap+cut types,overlap+ butt-joint types,cut-overlap + cut types and so forth; periodically changes of the lake body,A/S,dynamic geomorphology are the main factor which altogether make the characteristics of limited low-cutting capacity in the section and frequent diversions in the plane for the sandbodies in the underwater distributary channel of the shallow-water delta front in the study area.
引文
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[2]蒋平,赵应成,李顺明,等.不同沉积体系储集层构型研究与展望[J].新疆石油地质,2013,34(1):111-115.JIANG Ping,ZHAO Yingcheng,LI Shunming,et al. Reservoir configuration research and prospect of different deposit systems[J]. Xinjiang Petroleum Geology,2013,34(1):111-115.
[3]岳大力,吴胜和,刘建民.曲流河点坝地下储层构型精细解剖方法[J].石油学报,2007,28(4):99-103.YUE Dali,WU Shenghe,LIU Jianmin. An accurate method for anatomizing architecture of subsurface reservoir in point bar of meandering river[J]. Acta Petrolei Sinica,2007,28(4):99-103.
[4]马世忠,孙雨,范广娟.地下曲流河道单砂体内部薄夹层建筑结构研究方法[J].沉积学报,2008,26(4):632-639.MA Shizhong,SUN Yu,FAN Guangjuan. The method for studying thin interbed architecture of burial meandering channel sandbody[J]. Acta Sedimentologica Sinica,2008,26(4):632-639.
[5]廖保方,张为民,李列,等.辫状河现代沉积研究与相模式:中国永定河剖析[J].沉积学报,1998,16(1):34-39.LIAO Baofang,ZHANG Weiming,LI Lie,et al. Study on modern deposit of a braided stream and facies model:Taking the Yongding river as an example[J]. Acta Sedimentologica Sinica,1998,32(3):32-36.
[6]张昌民,尹太举,赵磊,等.辫状河储层内部建筑结构分析[J].地质科技情报,2013,32(4):7-13.ZHANG Changmin,YIN Taiju,ZHAO Lei,et al. Reservoir architecture analysis of braided channel[J]. Geological Science and Technology Information,2013,32(4):7-13.
[7]赵小庆,鲍志东,刘宗飞,等.河控三角洲水下分流河道砂体储集层构型精细分析:以扶余油田探51区块为例[J].石油勘探与开发,2013,40(2):181-188.ZHAO Xiaoqing,BAO Zhidong,LIU Zonglei,et al. An in-depth analysis of reservoir architecture of underwater distributary channel sand bodies in a river dominated delta:A case study of Block T51,Fuyu Oilliled[J]. Petroleum Exploration and Development,2013,40(2):181-188.
[8]徐丽强,李胜利,于兴河,等.辫状河三角洲前缘储层构型分析:以彩南油田彩9井区三工河组为例[J].油气地质与采收率,2016,23(5):50-57.XU Liqiang,LI Shengli,YU Xinghe,et al. Analysis of reservoir architecture in the braided river delta front:A case study of the Sangonghe Formation in Block Cai9 of Cainan Oilfield[J]. Petroleum Geology and Recovery Efficiency,2016,23(5):50-57.
[9]李志鹏,林承焰,董波,等.河控三角洲水下分流河道砂体内部建筑结构模式[J].石油学报, 2012, 33(1):101-105.LI Zhipeng,LIN Chengyan,DONG Bo,et al. An internal structure model of subaqueous distributary channel sands of the fluvial-dominated delta[J]. Acta Petrolei Sinica,2012,33(1):101-105.
[10]赵翰卿.松辽盆地大型叶状三角洲沉积模式[J].大庆石油地质与开发,1987,6(4):1-9.ZHAO Hanging. Sedimentary model of delta in Songliao Basin[J]. Petroleum Geology&Oilfield Development in Daqing,1987,6(4):1-9.
[11]楼章华,兰翔,卢庆梅,等.地形、气候与湖面波动对浅水三角洲沉积环境的控制作用:以松辽盆地北部东区葡萄花油层为例[J].地质学报,1999,73(1):83-91.LOU Zhanghua,LAN Xiang,LU Qingmei,et al. Controls of the topography,climate and lake level fluctuation on the depositional environment of a shallow-water delta:A case study of the Cretaceous Putaohua reservoir in the northern part of Songliao Basin[J]. Acta Geologica Sinica,1999,73(1):83-92.
[12]吕晓光,李长山,蔡希源,等.松辽大型浅水湖盆三角洲沉积特征及前缘相储层结构模型[J].沉积学报,1999,17(4):572-576.LXiaoguang,LI Changshan,CAI Xiyuan,et al. Depositional characteristics and front facies reservoir framework model in Songliao Shallow Lacustrine Delta[J]. Acta Sedimentologica Sinica,1999,17(4):572-576.
[13]张庆国,鲍志东,郭雅君,等.扶余油田扶余油层的浅水三角洲沉积特征及模式[J].大庆石油学院学报,2007,31(3):4-10.ZHANG Qingguo, BAO Zhidong, GUO Yajun, et al.Sedimentary characteristics and model of the Fuyu oil-bearing reservoir in Fuyu Oilfield[J]. Journal of Daqing Petroleum Institute,2007,31(3):4-10.
[14]韩永林,王成玉,王海红,等.姬塬地区长8油层组浅水三角洲沉积特征[J].沉积学报,2009,27(6):1057-1065.HAN Yonglin,WANG Chengyu, WANG Haihong,et al. Sedimentary characteristics of shallow-water deltas in Chang-8 Subsection of Yanchang Formation,Jiyuan area[J]. Acta Sedimentologica Sinica,2009,27(6):1057-1065.
[15]付晶,吴胜和,王哲,等.湖盆浅水三角洲分流河道储层构型模式:以鄂尔多斯盆地东缘延长组野外露头为例[J].中南大学学报(自然科学版),2015,46(11):4174-4182.FU Jing,WU Shenghe,WANG Zhe,et al. Architecture model of shallow-water delta distributary channel in lake basin:A case study of the Yanchang Formation outcrops in the eastern margin of Ordos Basin[J]. Journal of Central South University(Science and Technology),2015,46(11):4174-4182.
[16]朱伟林,李建平,周心怀,等.渤海新近系浅水三角洲沉积体系与大型油气田勘探[J].沉积学报,2008,26(4):575-582.ZHU Weilin, LI Jianping, ZHOU Xinhuai, et al. Neogene shallow water deltaic system and large hydrocarbon accumulations in Bohai Bay,China[J]. Acta Sedimentologica Sinica,2008,26(4):575-582.
[17]陈昭国.四川盆地洛带气田蓬莱镇组储层沉积特征研究[J].成都理工大学学报(自然科学版),2007,34(4):407-413.CHEN Zhaoguo. The reservoir depositional charactaristics of the Upper Jurassic Penglaizhen Formation in Luodai Gas Field, Sichuan Basin, China[J]. Journal of Chengdu University of Technology(Science&Technology Edition),2007,34(4):407-413.
[18]刘柳红,朱如凯,罗平,等.川中地区须五段—须六段浅水三角洲沉积特征与模式[J].现代地质,2009,23(4):667-676.LIU Liuhong,ZHU Rukai,LUO Ping,et al. Characteristics and depositional models for the shallow water deltas of the 5th-6th Interval,Xujiahe Formation,Upper Triassic in Central Sichuan Basin,China[J]. Geoscience,2009,23(4):667-676.
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