多属性相干分析在预测储层裂缝发育带中的应用

储层裂缝的准确预测对油气田勘探开发具有重要意义。在遵循相干技术原理的基础上,利用相干系数、倾角和方位角等属性,综合地质和测井资料,预测了目标储层裂缝发育带的空间展布。利用模糊识别技术,在沿层相干切片上计算出裂缝密度和裂缝连通性,从而圈定有利储层的分布范围。实例研究表明,该方法可以利用获得的裂缝属性图件,对储层的宏观和微观裂缝发育带做出较好的预测,从而识别和评价潜在有利储层。

Application of Multi-attribute Coherence Technique in Reservoir Prediction of Fracture-developed Zone

Accurate prediction of fractured zones was of great significance of exploration and development of oil and gas. Based on the seismic coherence principle, several seismic attributes, such as coherence, dip and azimuth were used to predict macro and micro scale fractured zones in reservoir distribution areas by integrating geologic and well logging data. Fracture density and fracture connectivity can be calculated based on slice of seismic coherence and the prediction of spatial distribution of reservoirs can be performed by using fussy measure technology. A case is reported where combining these fracture attributes with all relevant geological information allows to forecast the macro and micro fractured zones in reservoirs for undrilled areas. This approach ensures a most detailed picture of the fracture system.