轻质油低渗砂岩储层T2谱校正提高核磁共振渗透率准确性方法

管耀, 冯进, 王清辉, 周开金, 刘伟男, 石磊

A Method for Correcting T2 Spectrum in Low-permeability Light Oil Sandstone Reservoirs to Improve the Accuray of NMR-derived Permeability

GUAN Yao, FENG Jin, WANG Qinghui, ZHOU Kaijin, LIU Weinan, SHI Lei

表1 模拟轻质油低孔渗岩心核磁共振实验结果

Table 1 Simulation of NMR experimental results for low-porosity and low-permeability cores of light oil

岩心编号 渗透率/mD T2截止值/ms 束缚水饱和度/(%) 核磁共振孔隙度/(%) T2几何均值/ms 饱含水状态 饱含油状态 残余油状态 饱含水状态 饱含油状态 残余油状态 1 8.35 27.71 51.09 10.96 10.87 11.03 19.67 78.46 81.63 2 7.74 24.33 48.26 10.05 10.26 10.01 18.82 90.61 92.23 3 15.74 48.45 44.47 10.48 9.89 10.23 41.34 88.73 68.85 4 1.09 16.09 55.65 4.96 5.17 4.88 9.07 29.27 21.68 5 23.22 63.95 42.05 12.96 13.16 12.87 47.42 73.56 83.36 6 6.04 57.08 46.01 10.89 10.80 10.95 36.92 67.73 60.06 7 41.48 22.76 51.74 10.36 9.98 10.16 16.23 102.23 56.95 8 40.34 20.21 49.81 10.42 10.53 10.36 13.82 76.84 54.11 9 40.88 37.87 48.39 11.82 11.77 11.94 27.75 67.70 39.38 10 32.21 41.02 47.68 11.20 11.13 11.25 35.23 62.69 58.63