【摘要】 塔中地区中古48井区储层集中发育在奥陶系鹰山组二段,该段又划分为上亚段和下亚段。依据钻井资料,标定了不同层段、不同物性储集层的地震反射特征。利用地震资料提取不同层段的地震振幅属性,开展了钻后储集层地震预测与描述。储集层划分为Ⅰ、Ⅱ、Ⅲ类三种级别,它们总体沿构造高地和断裂带分布。上亚段厚度110m左右,储集层主要分布在鹰山组顶面向下100 m的范围内,沿不整合面都很发育,但Ⅰ类储集层在构造低部位分布较少;下亚段厚度260 m左右,储集层主要分布在鹰山组顶面向下110～200 m的范围内,它与构造和断裂发育带的关系更为紧密,在构造较低部位欠发育。下亚段Ⅰ类储集层要明显多于上亚段,中古45井已在下亚段获得高产油气流,说明下亚段储集层也有很大的勘探潜力。本区应该坚持上、下亚段两套目的层并举的勘探方向。更多还原

【Abstract】 The Middle-Lower Ordovician Yingshan 2nd Member carbonate reservoirs are developed in Well ZG-48 area,Tazhong,Tarim Basin.The 2nd Member of Yingshan Formation can be divided into the Upper and the Lower Submembers.According to drilling data,the seismic reflections of different submembers and reservoirs are calibrated.According to seismic amplitude properties,the seismic prediction and evaluation are carried out for the carbonate reservoirs after drilling.The reservoirs are divided into Types I,II and III in decreasing grade.It is shown that the Upper and the Lower Submember reservoirs are about 110m thick and about 260m thick respectively and distribute in the range of downward 0～100m and 110～100m respectively beneath the top surface of Yingshan Formation.The Upper Submember reservoirs develop well along the unconformity surface but Type I reservoirs are less in lower location of the anticline.The Lower Submember reservoirs that are thicker than the Upper ones are close related with faults.It is evaluated that the Types I reservoirs are obviously more in the Lower Submember than in the Upper Submember.Commercial oil flow has been drilled out at the Lower Submember in Well ZG-45,which implies good prospecting potential also in the Lower Submember.更多还原