碳酸盐岩洞穴储层有效性评价方法研究

The Method for Effective Evaluation of Carbonate Cave Reservoirs

塔中地区下奥陶统碳酸盐岩地层发育岩溶洞穴,充填作用强弱不等,洞穴的有效性受到严重影响。针对此问题,研究总结了判别洞穴储层有效性的方法,包括利用地质资料直观认识,根据井径、密度、自然伽马以及电成像、阵列声波等测井资料综合分析。该方法通过在塔中地区的应用,取得了显著的经济效果。

In the middle part of Tarim Basin the karst caves were developed in the lower Ordovician carbonate reservoirs .Some of them were filled with solid matter at different degrees ,the cave reservoir effectiveness was influenced seriously.In allusion to this problem,some methods were summed up for identifying the validity of the cave reservoirs,including direct recognizing with the geological data and comprehensive analysis according to the well logging data,such as the caliper,density,garma,micro-resistivity imaging and DSI.The method is used in the middle part of Tarim Basin with obvious effect .