小气顶低幅构造强底水油藏剩余油分布主控因素
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摘要
曹妃甸油田群河流相底水油藏是渤海海域已开发的一类重要油藏类型,采用不规则水平井井网开发,目前大多数油藏已进入中、高含水阶段,但采收率偏低,亟需理清剩余油分布规律和主控因素,指导油田下步综合调整。曹妃甸油田群新近系馆Ⅲ油组下段储量大、开发井多,是一个已进入高含水开发期的小气顶低幅构造强底水油藏。通过静态地质资料和动态生产资料相结合,认为微构造形态和小断距断层等构造因素、河漫滩成因夹层、油水界面差异、油田早期开发理念、目前开发井网等5大因素控制了研究区剩余油分布。在以第2期夹层为界的上、下开发层系中,剩余油分布具有一定规律性。上开发层系剩余油主要分布在油环井网不完善区域,下开发层系剩余油主要分布在油藏西部的油水界面较低及井网不完善区域、中部的水平生产井和气油界面之间、第4期主力夹层下部构造高部位以及距开发井较远的断层附近。
The bottom water reservoir of fluvial facies in Caofeidian oilfields is a kind of important reservoir type in the Bohai sea,developed by irregular horizontal well pattern. Most of the oil reservoirs have entered into middle-high water cut stage with low recovery efficiency. It is urgent to research distribution law and main control factors of the remaining oil for guiding next overall adjustment. The lower member of GuanⅢ(NgⅢ)oil formation in Caofeidian oilfields is a main development unit with massive OIP,many production wells,small gas cap and low amplitude structure at high water cut stage.By analysis of geological data and production data,five factors controlling the distribution of remaining oil in the study area were concluded as structure factor(micromorphology of structure,faults with small fault throw and so on),interlayer of fluvial flood-plain,difference of oil-water contact,early development policy and current production well pattern. Remaining oil distribution has some regularity in the upper and the lower development units separated by the second-period interlayer.Remaining oil in the upper unit mainly distributes in the area with imperfect well pattern of oil ring. Remaining oil in the lower unit distributes mainly in areas with lower oil-water contact and imperfect well pattern of western oil reservoir,in the central region between lateral section and gas-oil contact,in the structural high part under the fourth-period interlayer and in areas near faults far away from production well.
The bottom water reservoir of fluvial facies in Caofeidian oilfields is a kind of important reservoir type in the Bohai sea,developed by irregular horizontal well pattern. Most of the oil reservoirs have entered into middle-high water cut stage with low recovery efficiency. It is urgent to research distribution law and main control factors of the remaining oil for guiding next overall adjustment. The lower member of GuanⅢ(NgⅢ)oil formation in Caofeidian oilfields is a main development unit with massive OIP,many production wells,small gas cap and low amplitude structure at high water cut stage.By analysis of geological data and production data,five factors controlling the distribution of remaining oil in the study area were concluded as structure factor(micromorphology of structure,faults with small fault throw and so on),interlayer of fluvial flood-plain,difference of oil-water contact,early development policy and current production well pattern. Remaining oil distribution has some regularity in the upper and the lower development units separated by the second-period interlayer.Remaining oil in the upper unit mainly distributes in the area with imperfect well pattern of oil ring. Remaining oil in the lower unit distributes mainly in areas with lower oil-water contact and imperfect well pattern of western oil reservoir,in the central region between lateral section and gas-oil contact,in the structural high part under the fourth-period interlayer and in areas near faults far away from production well.
引文
[1]侯健,罗福全,李振泉,等.岩心微观与油藏宏观剩余油临界描述尺度研究[J].油气地质与采收率,2014,21(6):95-98.Hou Jian,Luo Fuquan,Li Zhenquan,et al.The critical description scale study on core microscopic and reservoir macroscopic remaining oil[J].Petroleum Geology and Recovery Efficiency,2014,21(6):95-98.
[2]严科.三角洲前缘储层特高含水后期剩余油分布特征[J].特种油气藏,2014,21(5):20-23.Yan Ke.Residual oil distribution features in delta front reservoir during late period of super-high water content[J].Special Oil&Gas Reservoirs,2014,21(5):20-23.
[3]黄石岩.河流和三角洲储层剩余油分布模式——以渤海湾盆地胜坨油田为例[J].石油实验地质,2007,29(2):167-171.Huang Shiyan.Distribution mode of remaining oil of fluvial and delta reservoir-taking the Shengtuo Oilfield of the Bohai Bay Basin as an example[J].Petroleum Geology&Experiment,2007,29(2):167-171.
[4]薛永超,程林松,梁卫,等.底水油藏特高含水期剩余油模式及开发对策[J].大庆石油地质与开发,2011,30(3):74-78.Xue Yongchao,Cheng Linsong,Liang Wei,et al.Remainned oil patterns for reservoir with bottom water at high water-cut stage and development policy[J].Petroleum Geology and Oilfield Development in Daqing,2011,30(3):74-78.
[5]高建,侯加根,林承焰,等.特低渗透砂岩油藏剩余油分布的主控因素及有利区块评价[J].中国石油大学学报:自然科学版,2007,31(1):13-18.Gao Jian,Hou Jiagen,Lin Chengyan,et al.Key factors of remaining oil distribution of the lowest permeable sandstone reservoir and favorable area evaluation[J].Journal of China University of Petroleum:Edition of Natural Science,2007,31(1):13-18.
[6]李兴国.陆相储层沉积微相与微型构造[M].北京:石油工业出版社,2000.Li Xingguo.Sedimentary microfacies and mini-structure of continental reservoir[M].Beijing:Petroleum Industry Press,2000.
[7]李兴国.油层微型构造对油井生产的控制作用——以胜坨、孤岛油田为例[J].石油勘探与开发,1987,14(2):53-59.Li Xingguo.Effect of mini-structure in a reservoir on well productivity[J].Petroleum Expoloration and Development,1987,14(2):53-59.
[8]侯建国,高建,张志龙,等.五号桩油田桩74断块特低渗砂岩油藏微构造模式及其开发特征[J].石油大学学报:自然科学版,2005,29(3):1-5.Hou Jianguo,Gao Jian,Zhang Zhilong,et al.Microstructure mode and development character of the lowest permeable sand stone reservoir of Zhuang74 fault block in Wuhaozhuang Oilfield[J].Journal of University of Petroleum,China:Edition of Natural Science,2005,29(3):1-5.
[9]朱德顺,王勇,朱德燕,等.渤南洼陷沙一段夹层型页岩油界定标准及富集主控因素[J].油气地质与采收率,2015,22(5):15-20.Zhu Deshun,Wang Yong,Zhu Deyan,et al.Analysis on recognition criteria and enrichment factors of interlayer shale oil of Es1in Bonan subsag[J].Petroleum Geology and Recovery Efficiency,2015,22(5):15-20.
[10]杨勇,胡罡,田选华.水驱油藏剩余油再富集成藏机理[J].油气地质与采收率,2015,22(4):79-86.Yang Yong,Hu Gang,Tian Xuanhua.Reservoir forming mechanism of remaining oil re-enrichment in water flooding reservoir[J].Petroleum Geology and Recovery Efficiency,2015,22(4):79-86.
[11]束青林.孤岛油田馆陶组河流相储层隔夹层成因研究[J].石油学报,2006,27(3):100-103.Shu Qinglin.Interlayer characterization of fluvial reservoir in Guantao Formation of Gudao Oilfield[J].Acta Petrolei Sinica,2006,27(3):100-103.
[12]屈亚光,丁祖鹏,潘彩霞,等.厚油层层内夹层分布对水驱效果影响的物理实验研究[J].油气地质与采收率,2014,21(3):105-107,110.Qu Yaguang,Ding Zupeng,Pan Caixia,et al.Physical experiment on distribution of interlayers impact on water flooding recovery efficiency[J].Petroleum Geology and Recovery Efficiency,2014,21(3):105-107,110.
[13]刘建民,徐守余.河流相储层沉积模式及对剩余油分布的控制[J].石油学报,2003,24(1):58-62.Liu Jianmin,Xu Shouyu.Reservoir sedimentary model of fluvial facies and it′s control to remaining oil distribution[J].Acta Petrolei Sinica,2003,24(1):58-62.
[14]党胜国,冯鑫,闫建丽,等.夹层研究在水平井开发厚层底水油藏中的应用——以曹妃甸11-6油田Massive砂体为例[J].油气地质与采收率,2015,22(1):63-67.Dang Shengguo,Feng Xin,Yan Jianli,et al.Interlayer research application in horizontal well development of thick bottom water reservoir-a case of Massive sand in Caofeidian11-6 oilfield[J].Petroleum Geology and Recovery Efficiency,2015,22(1):63-67.
[15]郝雪峰,尹丽娟.油藏类型与属性的动力学涵义[J].油气地质与采收率,2013,20(2):1-4.Hao Xuefeng,Yin Lijuan.Discussion on dynamic implications of oil reservoir type and property[J].Petroleum Geology and Recovery Efficiency,2013,20(2):1-4.
[2]严科.三角洲前缘储层特高含水后期剩余油分布特征[J].特种油气藏,2014,21(5):20-23.Yan Ke.Residual oil distribution features in delta front reservoir during late period of super-high water content[J].Special Oil&Gas Reservoirs,2014,21(5):20-23.
[3]黄石岩.河流和三角洲储层剩余油分布模式——以渤海湾盆地胜坨油田为例[J].石油实验地质,2007,29(2):167-171.Huang Shiyan.Distribution mode of remaining oil of fluvial and delta reservoir-taking the Shengtuo Oilfield of the Bohai Bay Basin as an example[J].Petroleum Geology&Experiment,2007,29(2):167-171.
[4]薛永超,程林松,梁卫,等.底水油藏特高含水期剩余油模式及开发对策[J].大庆石油地质与开发,2011,30(3):74-78.Xue Yongchao,Cheng Linsong,Liang Wei,et al.Remainned oil patterns for reservoir with bottom water at high water-cut stage and development policy[J].Petroleum Geology and Oilfield Development in Daqing,2011,30(3):74-78.
[5]高建,侯加根,林承焰,等.特低渗透砂岩油藏剩余油分布的主控因素及有利区块评价[J].中国石油大学学报:自然科学版,2007,31(1):13-18.Gao Jian,Hou Jiagen,Lin Chengyan,et al.Key factors of remaining oil distribution of the lowest permeable sandstone reservoir and favorable area evaluation[J].Journal of China University of Petroleum:Edition of Natural Science,2007,31(1):13-18.
[6]李兴国.陆相储层沉积微相与微型构造[M].北京:石油工业出版社,2000.Li Xingguo.Sedimentary microfacies and mini-structure of continental reservoir[M].Beijing:Petroleum Industry Press,2000.
[7]李兴国.油层微型构造对油井生产的控制作用——以胜坨、孤岛油田为例[J].石油勘探与开发,1987,14(2):53-59.Li Xingguo.Effect of mini-structure in a reservoir on well productivity[J].Petroleum Expoloration and Development,1987,14(2):53-59.
[8]侯建国,高建,张志龙,等.五号桩油田桩74断块特低渗砂岩油藏微构造模式及其开发特征[J].石油大学学报:自然科学版,2005,29(3):1-5.Hou Jianguo,Gao Jian,Zhang Zhilong,et al.Microstructure mode and development character of the lowest permeable sand stone reservoir of Zhuang74 fault block in Wuhaozhuang Oilfield[J].Journal of University of Petroleum,China:Edition of Natural Science,2005,29(3):1-5.
[9]朱德顺,王勇,朱德燕,等.渤南洼陷沙一段夹层型页岩油界定标准及富集主控因素[J].油气地质与采收率,2015,22(5):15-20.Zhu Deshun,Wang Yong,Zhu Deyan,et al.Analysis on recognition criteria and enrichment factors of interlayer shale oil of Es1in Bonan subsag[J].Petroleum Geology and Recovery Efficiency,2015,22(5):15-20.
[10]杨勇,胡罡,田选华.水驱油藏剩余油再富集成藏机理[J].油气地质与采收率,2015,22(4):79-86.Yang Yong,Hu Gang,Tian Xuanhua.Reservoir forming mechanism of remaining oil re-enrichment in water flooding reservoir[J].Petroleum Geology and Recovery Efficiency,2015,22(4):79-86.
[11]束青林.孤岛油田馆陶组河流相储层隔夹层成因研究[J].石油学报,2006,27(3):100-103.Shu Qinglin.Interlayer characterization of fluvial reservoir in Guantao Formation of Gudao Oilfield[J].Acta Petrolei Sinica,2006,27(3):100-103.
[12]屈亚光,丁祖鹏,潘彩霞,等.厚油层层内夹层分布对水驱效果影响的物理实验研究[J].油气地质与采收率,2014,21(3):105-107,110.Qu Yaguang,Ding Zupeng,Pan Caixia,et al.Physical experiment on distribution of interlayers impact on water flooding recovery efficiency[J].Petroleum Geology and Recovery Efficiency,2014,21(3):105-107,110.
[13]刘建民,徐守余.河流相储层沉积模式及对剩余油分布的控制[J].石油学报,2003,24(1):58-62.Liu Jianmin,Xu Shouyu.Reservoir sedimentary model of fluvial facies and it′s control to remaining oil distribution[J].Acta Petrolei Sinica,2003,24(1):58-62.
[14]党胜国,冯鑫,闫建丽,等.夹层研究在水平井开发厚层底水油藏中的应用——以曹妃甸11-6油田Massive砂体为例[J].油气地质与采收率,2015,22(1):63-67.Dang Shengguo,Feng Xin,Yan Jianli,et al.Interlayer research application in horizontal well development of thick bottom water reservoir-a case of Massive sand in Caofeidian11-6 oilfield[J].Petroleum Geology and Recovery Efficiency,2015,22(1):63-67.
[15]郝雪峰,尹丽娟.油藏类型与属性的动力学涵义[J].油气地质与采收率,2013,20(2):1-4.Hao Xuefeng,Yin Lijuan.Discussion on dynamic implications of oil reservoir type and property[J].Petroleum Geology and Recovery Efficiency,2013,20(2):1-4.