古潜山油藏裂缝性储层的测井评价

LOGGING EVALUATION OF FRACTURED RESERVOIRS IN BURIED HILLS

古潜山裂缝性储层具有复杂的储集空间和储层非均质性 ,对缝洞发育程度的评价在储层性能的评价中起着至关重要的作用。以岩心分析资料为基础 ,将地层微电阻率扫描成像测井 (FMI)、常规测井与地质理论相结合 ,对研究区的十几口井进行了详细的裂缝识别 ,对地层岩性特征、构造特征与地应力进行了分析。分析结果表明 ,该区裂缝及溶蚀孔洞发育程度从南到北、从构造高部位向东、西两翼的构造低部位逐渐变差 ,最大主应力方向基本为北东东南西西 ,古应力的方向基本为北东南西。该方法的解释结果与地质情况吻合较好。

The fractured reservoirs in buried hills are characterized with complicated storage space and heterogeneity. The evaluation of maturity on the caverns and fractures play an important role in the evaluation of reservoirs. The formation microscanner log, conventional logging and geological theories were applied to detailed recognition of fractures. The lithological features of formation, structural features and earth stress in dozens of wells in the studied area were analyzed by means of the core data and a variety of logging data. The analysis results show that the growth of fractures and caverns becomes worse from south to north and from the high position of construction to the low position of construction in the eastern and western sides of the high position. The most major stress is in the direction from northeast-east to southwest-west. The ancient stress is approximately in the direction from northeast to southwest. The interpreted results of this method correspond very well with the actual geologic knowledge.