鄂尔多斯盆地中东部奥陶系深层白云岩储集层特征及主控因素*
于洲1, 胡子见2, 王前平3, 赵静4, 吴东旭1, 吴兴宁1, 李维岭1, 鲁慧丽1, 朱文博1

Characteristics and main controlling factors of the Ordovician deep dolomite reservoirs in mid-eastern Ordos Basin
YU Zhou1, HU Zijian2, WANG Qianping3, ZHAO Jing4, WU Dongxu1, WU Xingning1, LI Weiling1, LU Huili1, ZHU Wenbo1
鄂尔多斯盆地中东部奥陶系深层白云岩储集层特征及充填物特征 a—含硬石膏结核粉晶白云岩,发育膏模孔,细粉晶白云石和少量石膏充填,岩心,桃112井,3824.34m,马二段; b—含硬石膏结核粉晶白云岩,发育膏模孔,细粉晶白云石和少量石膏充填,蓝色铸体片,单偏光,桃112井,3824.34m,马二段; c—含硬石膏结核细粉晶白云岩,发育膏模孔和微裂缝,石盐全充填,岩心,靳6井,3868.28m,马三段; d—含硬石膏结核细粉晶白云岩,发育膏模孔和微裂缝,石盐全充填,CT二维扫描,靳6井,3868.28m,马三段; e—含硬石膏结核细粉晶白云岩,CT二维扫描(岩盐用水溶蚀后),靳6井,3868.28m,马三段; f—含硬石膏结核细粉晶白云岩,发育膏模孔和微裂缝,石盐全充填,岩心,陕473井,4131.52m,马三段; g—砂砾屑云岩,发育粒间孔,蓝色铸体片,单偏光,桃112井,3623.13m,马四段; h—砂砾屑云岩,发育粒间孔,少量硬石膏和方解石充填,蓝色铸体片,单偏光,桃112井,3722.58m,马三段; i—鲕粒白云岩,发育粒间孔、粒内孔和粒间溶孔,少量硬石膏充填,红色铸体片,单偏光,靖探1井,4048.67m,马二段; j—鲕粒白云岩,发育粒间孔、粒内孔和粒间溶孔,石盐全充填,岩心,陕473井,4223.24m,马二段; k—晶粒化颗粒白云岩,发育晶间孔,红色铸体片,单偏光,靳6井,3688.43m,马四段; l—晶粒化颗粒白云岩,发育晶间孔,大多数被方解石充填,残留少量孔隙,红色铸体片,单偏光,靖探1井,3802.23m,马四段; m—斑状粉晶白云岩,粉晶白云石斑状区发育晶间孔,岩心,米探3井,2971.48m,马四段; n、o—斑状灰质白云岩,粉晶白云石斑状区发育晶间孔,岩心(n)和氩离子抛光扫描电镜(o),米探1井,2639.4 m,马四段