基于测井曲线元的裂缝定量识别

在大量观察岩心资料并对裂缝特征进行详细描述的基础上,对测井曲线进行岩心标定.利用常规测井曲线识别裂缝发育段,计算了裂缝的相关参数.提出测井曲线元的概念,并严格刻画了裂缝曲线元的数字特征,给出1种行之有效的判别裂缝存在的方法.关键井岩心资料证明该方法能够有效地识别裂缝.

Quantitative Discrimination of Fractures Based on Log Curve Unit

Through investigating a large amount of core data, the characteristics of fractures were described and recorded as log curves in detail. Based on these raw data, studied are the topological and geometrical features of conventional well log curves corresponding to fractures, according to which a novel concept named as well log curve unit is first proposed, and also a new equation to calculate probability of fracture existence is suggested, which makes fracture identification easier and more efficient using conventional log curves. After identifying, the relevant parameters, such as fracture porosity, fracture permeability, fracture density, etc., are calculated. The calculated results are consistent with the core and in-situ data, and it is proved that this method is a good example for those eastern oilfields to better re-use their conventional log data.