川西坳陷须四段上亚段致密砂岩岩石物理相划分
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摘要
川西坳陷须家河组是四川盆地主要产气层位之一。分析岩心观察及钻、测井等资料,认为须四段上亚段发育水下分流河道、河口坝、分流间湾及席状砂4种沉积微相,结合普通/铸体薄片、扫描电镜和X衍射等测试方法,深入开展储层成岩相及构造相研究,将成岩相划分为压实相、碳酸盐胶结相、溶蚀相、高岭石胶结-溶蚀相、碳酸盐胶结-溶蚀相5种;将构造相分为裂缝相和无裂缝相2种。综合沉积、成岩及构造因素,将研究区须四段上亚段岩石物理相划分为Ⅰ,Ⅱ1,Ⅱ2,Ⅲ及Ⅳ共5类,其中Ⅰ类为高孔基质-裂缝型储层,Ⅱ1类为高孔基质型储层,Ⅱ2类为低孔基质-裂缝型储层,Ⅲ类为低孔基质型储层,Ⅳ类为泥岩。结合测井曲线,建立各类岩石物理相的测井识别标准,为单井岩石物理相的划分提供依据。
Xujiahe Formation in western Sichuan Depression is one of the main gas producing horizons in Sichuan Basin.Based on the analysis of core observations,drilling and well data,it is considered that four sedimentary microfacies including underwater distributary channel,estuary dam,distributary bay and sheet sand are developed in the Upper 4 th Member of Xujiahe Formation.Combined with common/cast thin section observations,scanning electron microscopy and X-ray diffraction,the diagenetic facies and tectonic facies of the reservoirs are studied in depth,and the diagenetic facies is divided into compacted facies,carbonate cemented facies,dissolved facies,kaolinite-corrosion facies,and carbonate cemented-corrosion facies,tectonic facies is divided into fracture facies and non-fracture facies.By comprehensively considering the influence of sedimentary,diagenetic and structural factors on the reservoir,the petrophysical facies of the reservoir in the Upper 4 th Member of Xujiahe Formation is divided into five types including Ⅰ,Ⅱ_1,Ⅱ_2,Ⅲand Ⅳphysical facies.Among them,TypeⅠis a high-porosity matrix-fractured reservoir,Type Ⅱ_1 is a high-porosity matrix reservoir,Type Ⅱ_2 is a lowporosity matrix-fracture reservoir,Ⅲis a low-porosity matrix reservoir,and Type Ⅳ is mudstone.Based on the logging data,the logging criteria of various rock physical phases are established to provide a basis for the establishment of a single well petrophysical facies.
Xujiahe Formation in western Sichuan Depression is one of the main gas producing horizons in Sichuan Basin.Based on the analysis of core observations,drilling and well data,it is considered that four sedimentary microfacies including underwater distributary channel,estuary dam,distributary bay and sheet sand are developed in the Upper 4 th Member of Xujiahe Formation.Combined with common/cast thin section observations,scanning electron microscopy and X-ray diffraction,the diagenetic facies and tectonic facies of the reservoirs are studied in depth,and the diagenetic facies is divided into compacted facies,carbonate cemented facies,dissolved facies,kaolinite-corrosion facies,and carbonate cemented-corrosion facies,tectonic facies is divided into fracture facies and non-fracture facies.By comprehensively considering the influence of sedimentary,diagenetic and structural factors on the reservoir,the petrophysical facies of the reservoir in the Upper 4 th Member of Xujiahe Formation is divided into five types including Ⅰ,Ⅱ_1,Ⅱ_2,Ⅲand Ⅳphysical facies.Among them,TypeⅠis a high-porosity matrix-fractured reservoir,Type Ⅱ_1 is a high-porosity matrix reservoir,Type Ⅱ_2 is a lowporosity matrix-fracture reservoir,Ⅲis a low-porosity matrix reservoir,and Type Ⅳ is mudstone.Based on the logging data,the logging criteria of various rock physical phases are established to provide a basis for the establishment of a single well petrophysical facies.
引文
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[4]卢晨刚,张遂安,毛潇潇,等.致密砂岩微观孔隙非均质性定量表征及储层意义--以鄂尔多斯盆地X地区山西组为例[J].石油实验地质,2017,39(4):556-561.LU Chengang,ZHANG Suian,MAO Xiaoxiao,et al.Quantitative characterization of microscopic pore heterogeneity in tight sandstones and its reservoir significance:A case study of the Shanxi Formation in X area,Ordos Basin[J].Petroleum Geology&Experiment,2017,39(4):556-561.
[5]张晶晶.断陷湖盆致密砂砾岩储层特征及主控因素[J].大庆石油地质与开发,2017,36(6):52-57.ZHANG Jingjing.Characteristics and their controlling factors for the tight conglomerate reservoir in the fault depression lake basin[J].Petroleum Geology&Oilfield Development in Daqing,2017,36(6):52-57.
[6]四川油气区石油志编写组.中国石油地质志:四川卷[M].北京:石油工业出版社,1990.Compiling Group of Petroleum Geology of Sichuan Oil and Gas Area.Petroleum geology of China:Sichuan volume[M].Beijing:Petroleum Industry Press,1990.
[7]冯明石,刘家铎,孟万斌,等.四川盆地中西部须家河组储层特征与主控因素[J].石油与天然气地质,2009,30(6):713-719.FENG Mingshi,LIU Jiaduo,MENG Wanbin,et al.Characteristics and major controlling factors of reservoirs in the Xujiahe Formation of the central and western Sichuan Basin[J].Oil&Gas Geology,2009,30(6):713-719.
[8]郑定业,庞雄奇,张可,等.四川盆地上三叠系须家河组油气资源评价[J].特种油气藏,2017,24(4):67-72.ZHENG Dingye,PANG Xiongqi,ZHANG Ke,et al.Oil&gas resource evaluation for Xujiahe Formation in Upper Triassic Series in Sichuan Basin[J].Special Oil&Gas Reservoirs,2017,24(4):67-72.
[9]郑志红,李登华,白森舒,等.四川盆地天然气资源潜力[J].中国石油勘探,2017,22(3):12-20.ZHENG Zhihong,LI Denghua,BAI Senshu,et al.Resource potentials of natural gas in Sichuan Basin[J].China Petroleum Exploration,2017,22(3):12-20.
[10]杨克明,叶军,吕正祥.川西坳陷上三叠统须家河组天然气分布及成藏特征[J].石油与天然气地质,2004,25(5):501-505.YANG Keming,YE Jun,LüZhengxiang.Characteristics of gas distribution and reservoiring in Upper Triassic Xujiahe Formation in Western Sichuan depression[J].Oil&Gas Geology,2004,25(5):501-505.
[11]林良彪,陈洪德,翟常博,等.四川盆地西部须家河组砂岩组分及其古地理探讨[J].石油实验地质,2006,28(6):511-517.LIN Liangbiao,CHEN Hongde,ZHAI Changbo,et al.Sandstone compositions and paleogeographic evolution of the Upper Triassic Xujiahe Formation in the Western Sichuan Basin,China[J].Petroleum Geology&Experiment,2006,28(6):511-517.
[12]张健,李国辉,谢继容,等.四川盆地上三叠统划分对比研究[J].天然气工业,2006,26(1):12-15.ZHANG Jian,LI Guohui,XIE Jirong,et al.Stratigraphic division and correlation of Upper Triassic in Sichuan Basin[J].Natural Gas Industry,2006,26(1):12-15.
[13]王文之,田景春,张翔,等.川南界市场-黄家场地区须家河组储集砂体成因类型及模式[J].中国地质,2013,40(2):469-476.WANG Wenzhi,TIAN Jingchun,ZHANG Xiang,et al.Genetic type and pattern of reservoir sand bodies of Xujiahe Formation in Jieshichang-Huangjiachang area of southern Sichuan Basin[J].Geology in China,2013,40(2):469-476.
[14]李士祥,胡明毅,李浮萍.川西前陆盆地上三叠统须家河组砂岩成岩作用及孔隙演化[J].天然气地球科学,2007,18(4):535-539.LI Shixiang,HU Mingyi,LI Fuping.Diagenesis and porosity evolution of Upper Triassic Xujiahe Formation sandstone in Western Sichuan Foreland Basin[J].Natural Gas Geoscience,2007,18(4):535-539.
[15]郑荣才,戴朝成,朱如凯,等.四川类前陆盆地须家河组层序-岩相古地理特征[J].地质论评,2009,55(4):484-495.ZHENG Rongcai,DAI Chaocheng,ZHU Rukai,et al.Sequencebased lithofacies and paleogeographic characteristics of Upper Triassic Xujiahe Formation in Sichuan Basin[J].Geological Review,2009,55(4):484-495.
[16]陈涛涛,贾爱林,何东博,等.川中地区须家河组致密砂岩气藏气水分布规律[J].地质科技情报,2014,33(4):66-71.CHEN Taotao,JIA Ailin,HE Dongbo,et al.Gas and water distribution regularity for tight sandstone reservoirs of Xujiahe Formation in Central Sichuan Basin[J].Geological Science and Technology Information,2014,33(4):66-71.
[17]熊琦华,彭仕宓,黄述旺,等.岩石物理相研究方法初探--以辽河凹陷冷东-雷家地区为例[J].石油学报,1994,15(增刊):68-75.XIONG Qihua,PENG Shimi,HUANG Shuwang,et al.A preliminary study of the new concept of petrophysical facies and its initial application in Lengdong-Leijia region in Liaohe depression[J].Acta Petrolei Sinica,1994,15(Supplement):68-75.
[18]SPAIN D R.Petrophysical evaluation of a slope fan/basin floor fan complex:Cherry Canyon Formation,Ward County,Texas[J].AAPG Bulletin,1992,76(6):805-827.
[19]张一伟,熊琦华,王志章,等.枣园油田油藏精细描述技术与方法[J].石油学报,1994,15(增刊):10-18.ZHANG Yiwei,XIONG Qihua,WANG Zhizhang,et al.The technology and methods of reservoir description in Zaoyuan oilfield[J].Acta Petrolei Sinica,1994,15(Supplement):10-18.
[20]赵文智,王红军,徐春春,等.川中地区须家河组天然气藏大范围成藏机理与富集条件[J].石油勘探与开发,2010,37(2):146-157.ZHAO Wenzhi,WANG Hongjun,XU Chunchun,et al.Reservoirforming mechanism and enrichment conditions of the extensive Xujiahe Formation gas reservoirs,central Sichuan Basin[J].Petroleum Exploration and Development,2010,37(2):146-157.
[21]林良彪,陈洪德,姜平,等.川西前陆盆地须家河组沉积相及岩相古地理演化[J].成都理工大学学报:自然科学版,2006,33(4):376-383.LIN Liangbiao,CHEN Hongde,JIANG Ping,et al.Sedimentary facies and litho-paleogeographic evolution of the Upper Triassic Xujiahe Formation in West Sichuan foreland basin[J].Journal of Chengdu University of Technology:Science&Technology Edition,2006,33(4):376-383.
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