声-电成像测井在飞仙关组鲕滩储层评价中的应用

APPLICATION OF ACOUSTIC AND RESISTIVITY IMAGING LOGGING TO OOLITIC RESERVOIR EVALUATION OF FEIXIANGUAN FORMATION

在裂缝、孔洞型储层评价过程中,如何对裂缝与溶蚀孔洞及其有效性进行识别与判断一直是测井解释的一个难点。针对四川盆地川东北地区气藏地质条件复杂、储层裂缝发育的实际情况,在对鲕滩储层基本地质特征进行分析的基础上,提出了应用成像测井与常规测井资料结合对飞仙关组鲕滩储层裂缝发育程度进行评价,并且利用地层各向异性、斯通利波波形、斯通利波能量衰减、斯通利波反射系数、裂缝走向与地应力走向之间的关系对裂缝有效性进行了判断。取得了良好的应用效果,对同类储层的评价具有一定的参考价值。

In a fractured-vuggy reservoirs evaluation,how to identify both fracture and dissolution vug and to judge their effectiveness are difficulties during well-logging interpretation. Oolitic gas reservoirs in northeastern Sichuan Basin are characterized by complicated geology conditions and developed fracture. In this paper,to apply imaging logging and conventional logging data to evaluate the fracture growth degree of Feixianguan Formation oolitic reservoir is presented. Meanwhile,the fracture effectiveness can be judged by some research of formation anisotropy,Stoneley waveform,Stoneley-wave attenuation and reflection coefficient as well as a relationship between fracture strike and in-situ stress strike. This applied result is very well and also provides guidance for an evaluation to similar reservoirs.