基于QAPM模型的元素俘获谱测井应用

Application of elemental capture spectroscopic log based on QAPM model

目前,火成岩储层评价建立的QAPM矿物模型较为合理适用,但对应的响应方程组中4类矿物的参数确定存在一定难度。元素俘获谱测井(ECS)是对地层化学元素的反映,可以利用ECS数据,结合CIPW标准矿物法思想实现火成岩中元素到矿物的转化,同时依据QAPM模型思想对矿物进行分类,结合常规测井计算矿物参数。应用上述方法计算了松辽盆地南部深层火成岩储层孔隙度,与岩心分析孔隙度对比结果,二者的相关系数为0.932,说明本文提供的方法是适用的。

QAPM model have shown promising in assessment of igneous rock reservoirs.However,the determination of the parameters in the response equation poses great challenge in practice.Elemental capture spectroscopic log(ECS)is a reflection of chemical elements of the formation.In this paper,based on CIPW standard mineral method,using logging data to achieve the transformation from elements igneous rock to mineral,we calculated mineral parameters based on QAPM model for the classification of mineral.The porosity calculated using the proposed method for the deep igneous rock reservoir in Songliao Basin is in good agreement with that from core analysis.The correlation coefficient between them is as high as 0.932.