中东地区强非均质性碳酸盐岩储层测井评价方法及应用

中东地区孔隙型碳酸盐岩储层具有岩石类型多样、孔隙结构复杂、非均质性强等特征，应用单一测井方法或参数难以进行有效的储层评价和分类。针对该类强非均质性孔隙型碳酸盐岩储层，本文提出了基于视阻抗参数Z、核磁测井T2对数平均优化参数T2LMY、成像测井面孔率AREA和偶极横波测井各向异性参数ANI多参数表征的测井综合评价方法，构建了常规测井储层识别、核磁测井孔隙结构评价、成像测井孔隙类型识别和偶极横波测井孔隙发育程度判断的评价体系。将其应用到伊拉克A油田白垩系Mishrif组储层分类评价中，分类评价结果能够有效地划分储层类型，结果与岩心实验分析结果吻合度高，对中东地区碳酸盐岩储层测井评价提供了有力支撑，对其它地区类似储层评价具有借鉴价值。

Logging evaluation method and application of strongly heterogeneous carbonate reservoir in Middle East

Vuggy carbonate reservoirs in the Middle East are characterized by diverse rock types, complex pore texture and strong heterogeneity. It is difficult to evaluate and classify the reservoirs effectively by using a single logging method or parameter. A comprehensive logging evaluation method based on the multi-parameter characterization of apparent impedance parameter Z, logarithmic mean optimization parameter T2LMY of NMR logging T2, imaging logging face rate Area and anisotropy parameter ANI of dipole shear wave logging is proposed for this kind of strongly heterogeneous vuggy carbonate reservoir. The evaluation system of reservoir identification with conventional logging data, pore structure evaluation with nuclear magnetic logging data, pore type identification with imaging logging data and pore development degree judgment with dipole shear wave data is constructed. It is applied to the classification and evaluation of the Cretaceous Mishrif Formation reservoir in A oilfield of Iraq. The classification and evaluation results can effectively classify the reservoir types, and the results are in highly consistent with the core experimental analysis results. It provides strong support for the logging evaluation of carbonate reservoirs in the Middle East, and has reference for the evaluation of similar reservoirs in other areas.