白豹油田长6油藏储层岩矿及孔隙结构特征
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摘要
通过岩心观察、薄片鉴定以及物性与压汞数据分析,对白豹油田长63储层进行了岩矿特征研究,认为目标储层砂岩类型主要为长石砂岩及岩屑长石砂岩。详细分析了储层物性及微观孔隙结构特征,发现主要孔隙类型为长石溶孔和粒间孔,小孔微细喉为最优的孔喉组合。对区内长63储层岩石的成岩期次和类型、渗透率和孔隙度的最低下限进行了研究,结果表明研究区北部、中部区域经历绿泥石胶结等建设性成岩作用,储层物性较东部区域略好。
The rock and mineral characteristics of Chang 63 reservoir in Baibao Oilfield were studied through core observation,thin section identification and analysis of physical properties and mercury injection data,and it is held that the sandstone types of the target reservoirare mainly feldspar sandstone and lithic feldspar sandstone. The analysis of reservoir physical property and micro-pore structure characteristics shows that the main pore types of the reservoir are feldspar solution pore and intergranular pore,and the small pore-fine throat is the best pore-throat combination. The study on the stages and types of diageneses and the lower limits of permeability and porosity of Chang 63 reservoir rocks in the study area shows that the northern and central regions of the study area had experienced constructive diageneses such as chlorite cementation,where the reservoir physical properties are slightly better than those in the eastern region.
The rock and mineral characteristics of Chang 63 reservoir in Baibao Oilfield were studied through core observation,thin section identification and analysis of physical properties and mercury injection data,and it is held that the sandstone types of the target reservoirare mainly feldspar sandstone and lithic feldspar sandstone. The analysis of reservoir physical property and micro-pore structure characteristics shows that the main pore types of the reservoir are feldspar solution pore and intergranular pore,and the small pore-fine throat is the best pore-throat combination. The study on the stages and types of diageneses and the lower limits of permeability and porosity of Chang 63 reservoir rocks in the study area shows that the northern and central regions of the study area had experienced constructive diageneses such as chlorite cementation,where the reservoir physical properties are slightly better than those in the eastern region.
引文
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[2]王琪,糕喜准,陈国俊,等.鄂尔多斯西部长6砂岩成岩演化与优质储层[J].石油学报,2005,26(5):18-23.WANG Qi,ZHUO Xizhun,CHEN Guojun,et al. Diagenetic evolution and high-quality reservoir in Chang 6 sandstone in the western Ordos Basin[J]. Acta Petrolei Sinica,2005,26(5):18-23.
[3]刘小洪,罗静兰,郭彦如,等.鄂尔多斯盆地陕北地区上三叠统延长组长6油层组的成岩相与储层分布[J].地质通报,2008,27(5):627-630.LIU Xiaohong,LUO Jinglan,GUO Yanru,et al. Diagenetic facies and distribution of the Chang 6 reservoir group of the Upper Triassic Yangchang Formation in the northern.Shaanxi. area,Ordos Basin[J]. China Geological Bulletin of China,2008,27(5):627-630
[4]赵靖舟,杨县超,武富礼,等.论隆起背景对鄂尔多斯盆地陕北斜坡区三叠系油藏形成和分布的控制作用[J].地质学报,2006,80(5):648-655.ZHAO Jingzhou,YANG Xianchao,WU Fuli,et al. Controlling of uplifts on the Triassic petroleum accumulation and distribution in North Shaanxi Slope,Ordos Basin[J].Acta Geologica Sinica,2006,80(5):648-655.
[5]张学文,尹家宏.低渗透砂岩油藏油水相对渗透率曲线特征[J].特种油气藏,1999,6(2):27-30.ZHANG Xuewen,YIN Jiahong. Features of oil water relative permeability curves for low permeability sandstone reservoir[J]. Special Oil&Gas Reservoir,1999,6(2):27-30.
[6]陈钢花,王中文,王湘文,等.河流相沉积微相与测井相研究[J].测井技术,1996,20(5):335-340.CHEN Ganghua,WANG Zhongwen,WANG Xiangwen,et al. Study of sedimentary microfacies of river facies and electrofacies[J]. Well Logging Technology,1996,20(5):335-340.
[7]武富礼,李文厚,李玉宏,等.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,2004,6(3):307-315.WU Fuli,LI Wenhou,LI Yuhong,et al. Delta sediments and evolution of the Yanchang Formation of Upper Triassic in Ordos Basin[J]. Journal of Palaeogeography,2004,6(3):307-315.
[8]聂永生,田景春,夏青松,等.鄂尔多斯盆地白豹-姬塬地区上三叠统延长组物源分析[J].油气地质与采收率,2004,11(5):4-6.NIE Yongsheng,TIAN Jingchun,XIA Qingsong,et al.Source analysis of Yanchang Formation in Baibao-Jiyuan region,Ordos Basin[J]. Petroleum Geology and Recovery Efficiency,2004,11(5):4-6.
[9]王昌勇,郑荣才,王成玉,等.鄂尔多斯盆地姬塬地区延长组中段岩性油藏成藏规律研究[J].岩性油气藏,2010,22(2):84-89.WANG Changyong,ZHANG Rongcai,WANG Chengyu,et al. Hydrocarbon accumulation law of lithologic reservoirs of middle Yanchang Formation in Jiyuan Area,Ordos Basin[J]. Lithologic Reservoirs,2010,22(2):84-89.
[10]文华国,郑荣才,陈洪德,等.鄂尔多斯盆地白豹—华池地区长6砂岩储层特征[J].石油学报,2007,28(4):46-51.WEN Huaguo,ZHENG Rongcai,CHEN Hongde,et al.Characteristics of Chang 6 sandstone reservoir in BaibaoHuachi region of Ordos Basin[J]. Acta Petrolei Sinica2007,28(4):46-51.
[11]李军,张超漠.利用测井资料分析不同成因砂体[J].测井技术,1998,22(1):20-23.LI Jun,ZHANG Chaomo. Analysis of different geneses of sand body using logging data[J]. Well Logging Technology,1998,22(1):20-23.
[12]宋凯,吕剑文,杜金良,等.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J].古地理学报,2002,4(3):59-66.SONG Kai,LV Jianwen,DU Jinliang,et al. Source direction analysis and delta depositional systems of Yanchang Formation of the Upper Triassic in the central Ordos Basin[J]. Journal of Palaeogeogaphy,2002,4(3):59-66.
[13]BYRNE H,KIMK H. Rare earth element scavening in sea water[J]. Geochim Acta,1990,54(2):645-656.
[14] LEE J H,BYRNE R H. Examination of comarative rare earth element complexation behavior using linear free-energy relationships[J]. Geochim Cosmochim Acta,1992,56(1):127-138.
[15] LEE J H,BYRNE R H. Complexation of trivalent rare earth elements(Ce,Eu,Gd,Tb,Yb)by carbonate ions[J]. Geochim et Cosmochim Acta,1993,57(3):295-302.
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