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从渭河盆地内P井奥陶系岩心及岩屑的核磁共振分析入手,利用所获得的T2弛豫谱形态特征、可动流体百分数及孔隙度和渗透率数据,结合常规测井解释、岩石薄片显微鉴定及扫描电镜分析,对该井奥陶系碳酸盐岩储层特征进行了综合研究。同时,利用核磁共振测井资料,采用标准T2分布差异及差谱分析对奥陶系储层流体进行了识别。认为:渭河盆地P井奥陶系碳酸盐岩储层主要发育微孔隙,可动流体较少,在测量井段内并没有解释出含有油气的储层。核磁共振技术在渭河盆地P井奥陶系储层评价中得到了准确、快速的应用。
Based on the NMR analysis of the Ordovician core and cuttings in the P-well in the Weihe basin, the T2 relaxation spectrum obtained, the percentages of the movable fluid and the porosity and permeability data were used. Combined with the conventional log interpretation, Micro-identification and scanning electron microscopy analysis of the Ordovician carbonate reservoir reservoir characteristics of a comprehensive study. At the same time, the logarithm of NMR logging data was used to identify the Ordovician reservoir fluids by using the standard T2 distribution difference and difference spectrum analysis. It is considered that the Ordovician carbonate reservoir in the P-well of Weihe Basin mainly develops micropores and has few movable fluids. There is no explanation for reservoirs containing hydrocarbons in the measurement interval. Nuclear magnetic resonance (NMR) technique has been applied accurately and quickly in evaluating the Ordovician reservoir in Well P in Weihe Basin.