中东H油田复杂碳酸盐岩储层评价及产能预测

利用岩芯资料分析了中东H油田MB2组颗粒灰岩与泥粒灰岩储层的岩石学特征、物性特征和储层的孔隙结构特征，研究结果表明，MB2组碳酸盐岩两种储层有较强的非均质性。根据孔喉半径分布曲线特征，把储层划分为大、中、小3种孔隙结构，结果显示MB2组上段颗粒灰岩以大孔和中孔为主，下段泥粒灰岩以中孔和小孔为主。利用毛管孔径划分的3种孔隙结构刻度了核磁T₂谱，结果显示其与核磁T₂谱划分的3种孔隙具有很好的一致性，找到了用核磁准确评价储层的孔隙结构的一种有效途径。此外，还对MB2组储层进行了产能预测。

Productivity Forecast and Characteristics of the Carbonate Reservoir in H Oilfield in the Middle East

The lithologies of the MB2 Formation in H Oilfield are mainly composed of grainstone and packstone. The core data are used to analyze the lithology, physical property and pore structure property. The result shows that the carbonate reservoirs in H Oilfield are of complicated heterogeneity. The pore systems are classified into Macro pore, Mezzo pore and Micro pore according to the mercury injection. Marco pores and Mezo pores are predominant in limestone with a grainstone texture in the upper interval of MB2 Formation, and the packstone pore system mainly consists of Mezzo pore and Micro pore. The Nuclear Magnetic Resonance Logging Tool(CMR)has been employed to characterize the pore system of the limestone reservoirs. The results of the CMR pore size distribution agree with the core data in general. The NMR can evaluate the reservoir accurately. Based on the study result, the productivity prediction of the MB2 formation is made.