主曲率法在麻柳场嘉陵江组裂缝预测中的应用研究

阐述了主曲率法用于裂缝预测的理论原理及运用前提;在微分几何原理的基础上导出了构造面主曲率值的计算公式;给出了形成裂缝所必须的临界曲率值的确定方法;建立了主曲率法计算模型.以麻柳场嘉陵江组气藏为实例,运用该方法对嘉23、嘉43两储层的裂缝发育情况进行了预测.预测结果与工区的生产及地质特征吻合较好,表征了主曲率法在储层裂缝分布预测中的可行性和合理性.

Research on main curvature method for fracture prediction in Jialingjiang formation of Maliuchang

This paper addresses the theory and precondition when main curvature method is used for fracture prediction; educes the main curvature value calculation formula based on differential geometry; presents a method to determine the critical curvature value necessary to generate fracture; and establishes a calculation model of main curvature method. With the gas reservoir in Jialingjiang formation of Maliuchang as an example, we predict the fracture development in Jia23 and Jia43 reservoirs. The results coincide with the production and geologic feature in the study area, and indicate the method is feasible and rational in reservoir fracture prediction.