苏里格地区马五_5亚段储集层特征及其主控因素
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摘要
基于岩心观察、镜下薄片、扫描电镜、压汞以及物性等资料,结合地球物理、地球化学技术方法,对苏里格地区奥陶系马家沟组马五5亚段储集层特征进行了系统的研究,分析了影响储集层形成和发育的主要控制因素,预测了有利储集层的分布范围。马五5亚段储集层主要岩性为泥—粉晶白云岩和粉晶白云岩;主要储集空间类型为晶间孔、晶间溶孔;马五25小层的物性较之马五15小层更好。沉积相是储集层形成的物质基础,云坪微相是储集层发育的有利沉积相带;成岩作用是形成有利储集空间的重要保证,白云岩化、溶蚀作用等为建设性成岩作用;构造作用是储集层发育的有效补充因素。
Based on core observation and the analysis on the data of thin section, SEM, mercury injection and petrophysical property andusing geophysical and geochemical methods, the paper systematically studies the reservoir characteristics of Ma-55 submember of Ordovi-cian Majiagou formation in Sulige area, analyzes the main controlling factors influencing reservoir formation and development and predictsthe distribution of favorable reservoirs. The reservoir of Ma-55 submember is dominated by argillaceous-silty dolomite and silty dolomitewith the main reservoir spaces of intercrystalline pores and intercrystalline dissolved pores. The petrophysical properties of Ma-525 are betterthan those of Ma-515. Sedimentary facies is the material basis for reservoir formation and the microfacies of dolomite flat is the favorable sedi-mentary facies belt for reservoir development. Diagenesis is a significant guarantee to form favorable reservoir spaces and the constructivediagenesis such as dolomitization and dissolution are favorable to reservoir reconstruction. The tectonism is the effective supplement for res-ervoir development.
Based on core observation and the analysis on the data of thin section, SEM, mercury injection and petrophysical property andusing geophysical and geochemical methods, the paper systematically studies the reservoir characteristics of Ma-55 submember of Ordovi-cian Majiagou formation in Sulige area, analyzes the main controlling factors influencing reservoir formation and development and predictsthe distribution of favorable reservoirs. The reservoir of Ma-55 submember is dominated by argillaceous-silty dolomite and silty dolomitewith the main reservoir spaces of intercrystalline pores and intercrystalline dissolved pores. The petrophysical properties of Ma-525 are betterthan those of Ma-515. Sedimentary facies is the material basis for reservoir formation and the microfacies of dolomite flat is the favorable sedi-mentary facies belt for reservoir development. Diagenesis is a significant guarantee to form favorable reservoir spaces and the constructivediagenesis such as dolomitization and dissolution are favorable to reservoir reconstruction. The tectonism is the effective supplement for res-ervoir development.
引文
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[15]侯云东,文采霞,高星,等.鄂尔多斯盆地奥陶系马五5成藏控制因素研究[R].西安:长庆油田分公司,2011.HOU Yundong,WEN Caixia,GAO Xing,et al.The study on con-trolling factors of hydrocarbon accumulation of Ordovician M55sub-member in the Ordos basin[R].Xi′an:Changqing Oilfield Compa-ny,2011.
[2]侯方浩,方少仙,董兆雄,等.鄂尔多斯盆地中奥陶统马家沟组沉积环境与岩相发育特征[J].沉积学报,2003,21(1):106-112.HOU Fanghao,FANG Shaoxian,DONG Zhaoxiong,et al.The devel-opmental characters of sedimentary environments and lithofacies ofMiddle Ordovician Majiagou formation in Ordos basin[J].Acta Sedi-mentologica Sinica,2003,21(1):106-112.
[3]史基安,邵毅,张顺存,等.鄂尔多斯盆地东部地区奥陶系马家沟组沉积环境与岩相古地理研究[J].天然气地球科学,2009,20(3):316-324.SHI Ji'an,SHAO Yi,ZHANG Shuncun,et al.Lithofacies paleogeog-raphy and sedimentary environment in Ordovician Majiagou forma-tion,eastern Ordos basin[J].Natural Gas Geoscience,2009,20(3):316-324.
[4]谭桂花.鄂尔多斯盆地苏里格地区奥陶系马家沟组成岩作用[D].西安:西安石油大学,2009.TAN Guihua.Diagenesis of Majiagou formation of Ordovician in Su-lige region,Ordos basin[D].Xi'an:Xi'an Shiyou University,2009.
[5]何江,方少仙,侯方浩,等.鄂尔多斯盆地中部气田中奥陶统马家沟组岩溶型储层特征[J].石油与天然气地质,2009,30(3):350-356.HE Jiang,FANG Shaoxian,HOU Fanghao,et al.Characteristics ofkarst reservoirs in the Middle Ordovician Majiagou formation of gasfields in the central Ordos basin[J].Oil&Gas Geology,2009,30(3):350-356.
[6]黄擎宇,张哨楠,丁晓琪,等.鄂尔多斯盆地西南缘奥陶系马家沟组白云岩成因研究[J].石油实验地质,2010,32(2):147-154.HUANG Qingyu,ZHANG Shaonan,DING Xiaoqi,et al.Origin of dolomite of Ordovician Majiagou formation,western and southernmargin of the Ordos basin[J].Petroleum Geology&Experiment,2010,32(2):147-154.
[7]董兆雄,姚泾利,孙六一,等.重新认识鄂尔多斯南部早奥陶世马家沟期碳酸盐台地沉积模式[J].中国地质,2010,37(5):1 327-1 335.DONG Zhaoxiong,YAO Jingli,SUN Liuyi,et al.The carbonate plat-form sedimentary model of southern Ordos basin[J].Geology in Chi-na,2010,37(5):1 327-1 335.
[8]苏中堂.鄂尔多斯盆地古隆起周缘马家沟组白云岩成因及成岩系统研究[D].成都:成都理工大学,2011.SU Zhongtang.The study of dolomite genesis and diagenisis system ofMajiagou formation aroud paleo-uplift,Ordos[D].Chengdu:Cheng-du University of Technology,2011.
[9]朱广社,赵俊兴,邵晓岩,等.苏里格东部马5五储层特征及成藏控制因素[J].西南石油大学学报(自然科学版),2014,36(3):45-53.ZHU Guangshe,ZHAO Junxing,SHAO Xiaoyan,et al.Reservoir char-acteristics and controlling factors of M55Sub-member of Majiagouformation in the east of Sulige area[J].Journal of Southwest Petro-leum University(Science&Technology Edition),2014,36(3):45-53.
[10]杨西燕,包洪平,任军峰,等.鄂尔多斯盆地马家沟组马五5亚段白云岩类型及稳定同位素特征[J].天然气地球科学,2015,26(4):650-656.YANG Xiyan,BAO Hongping,REN Junfeng,et al.Types of dolo-mites and characteristics of stable isotope from the Ma 55Sub-mem-ber of Ordovician Majiagou formation in Ordos basin[J].NaturalGas Geoscience,2015,26(4):650-656.
[11]宁博,王起琮,李百强,等.鄂尔多斯盆地马五5亚段白云岩化成因模式[J].新疆石油地质,2015,36(5):531-538.NING Bo,WANG Qicong,LI Baiqiang,et al.Genetic model forM5-5 Sub-member dolomitization of Majiagou formation in Ordosbasin[J].Xinjiang Petroleum Geology,2015,36(5):531-538.
[12]姚泾利,王兰萍,张庆,等.鄂尔多斯盆地南部奥陶系古岩溶发育控制因素及展布[J].天然气地球科学,2011,22(1):56-65.YAO Jingli,WANG Lanping,ZHANG Qing,et al.Controlling fac-tor and distribution of paleo-karst development in Ordovician ofsouthern Ordos basin[J].Natural Gas Geoscience,2011,22(1):56-65.
[13]王志萍.四川盆地中部雷口坡组顶部风化壳岩溶型储层特征及评价研究[D].成都:西南石油大学,2012.WANG Zhiping.Characteristics and evaluation of the weatheringkarst reservoir at top Leikoupo formation in central Sichuan region[D].Chengdu:Southwest Petroleum University,2012.
[14]王建民,王佳媛.鄂尔多斯盆地伊陕斜坡上的低幅度构造与油气富集[J].石油勘探与开发,2013,40(1):49-57.WANG Jianmin,WANG Jiayuan.Low-amplitude structures and oil-gas enrichment on the Yishaan slope,Ordos basin[J].PetroleumExploration and Development,2013,40(1):49-57.
[15]侯云东,文采霞,高星,等.鄂尔多斯盆地奥陶系马五5成藏控制因素研究[R].西安:长庆油田分公司,2011.HOU Yundong,WEN Caixia,GAO Xing,et al.The study on con-trolling factors of hydrocarbon accumulation of Ordovician M55sub-member in the Ordos basin[R].Xi′an:Changqing Oilfield Compa-ny,2011.