断层相关裂隙的一种定量计算方法

A New Method for Quantitative Calculating of Fault Fractured Pore Space

利用平衡剖面及几何学原理,建立断层面脱空空间理论模型、断层破裂带裂隙空间的置换模型,推导出一个在2维剖面上计算断层相关裂隙空间的定量计算公式,并讨论了相关参数的地质含义及取值方法。结果表明,断层面与层面的夹角变化率是控制断层相关裂隙空间的主控因素。该计算方法为断层裂缝的预测及评价提供了一种全新的思路和方法。

In this study, based on the area balancing technique and geometrical relationship, we developed a 2-D model and related equation to calculate pore space of fractures associated with fault development through constructing a detachment void space model in a fault-bend fold and a fracture pore space to void space exchange model. Geological meanings of the main parameters in the equation are discussed. The result indicates that the derivative of the angle between the fault and the bedding surface is the major control factor on the development of fracture pore space associated with fault. The equation created for calculating fault fracture pore space provides a new thought and method for quantitative description of the development of fault fractures.