测井资料在三塘湖盆地裂缝性储层研究中的应用

APPLICATION OF LOGGING DATA IN STUDY OF FRACTURED RESERVOIR OF SANTANGHU BASIN

裂缝性储层定量评价是三塘湖盆地二叠系油藏评价勘探的重点和难点,本文利用成像测井、双侧向测井等资料,以牛圈湖油田二叠系油藏为例,系统总结了裂缝性储层岩性在EMI和CAST图像上的响应特征、裂缝识别特征。确定了两组裂缝的产状及形成期主应力方向,进而对发育于不同岩性中的两组裂缝三度空间延展性及裂缝宽度、裂缝渗透率进行计算,计算结果表明,同一构造部位裂缝宽度、裂缝渗透率与岩性有关。

The quantitative evaluation for fractured reservoir is the focal point and difficulty for evaluating exploration of Permian system in Santanghu basin. The paper systematically summed up the responded and distinguished characteristics of fractured reservoir lithology in EMI and CAST image by using the data of image log, double-laterolog and the reservoir as example in Permian system in Niuquanhu Oil Field. It also defined occurrence and major stress direction of 2 sets of fracture and formative period, and calculated the ductility, fracture width and fracture permeability of three-dimensional space of 2 sets of fracture developed in different lithologies. The result shows the fracture width and permeability in same structural part relate to the lithology.