High resolution borehole resistivity image logs provide valuable bedding and fracture data from subsurface rocks including fracture type, orientation and aperture. The present study shows that common average shape and aperture geometry of uniformly located layer-bound fractures can be inferred from scan-line density and aperture-depth plots using image log data from a deviated well.

The proposed method extends the use of borehole image logs and allows 3-dimensional (3D) modeling of fractures and fractured layers from subsurface data. So far, such 3D fracture studies could only be conducted using outcrop data. The approach is quite robust because correspondence between fracture geometry and image log plots is independent of fracture length and orientation, and applies to any fracture shape and aperture geometry.

Joint interpretation of fracture scan-line density and aperture-depth plots, and bedding picks from borehole images also helps differentiate isolated/dispersed, unbound and multilayer fractures. Abundance of fractures that breach bed boundaries gives an idea about the cohesive bonding strength of bedding contacts and pave the way to construct fracture stratigraphy with several fractured layers that are separated by interfaces of varying bonding strength or by ductile beds. 3D fracture geometry may also provide some information on the type and mode of fractures and geo-mechanical conditions under which the fractures were generated.

高分辨率钻孔电阻率图像测井提供了地下岩石的有价值的层理和裂缝数据，包括裂缝类型、方向和孔径。本研究表明，可以使用斜井的图像测井数据从扫描线密度和孔径深度图推断出均匀定位的层状裂缝的常见平均形状和孔径几何形状。

所提出的方法扩展了钻孔图像测井的使用，并允许根据地下数据对裂缝和裂缝层进行 3 维 (3D) 建模。到目前为止，这种 3D 裂缝研究只能使用露头数据进行。该方法非常稳健，因为裂缝几何形状和图像测井图之间的对应关系与裂缝长度和方向无关，并且适用于任何裂缝形状和孔径几何形状。

裂缝扫描线密度和孔径深度图的联合解释以及钻孔图像中的层理拾取也有助于区分孤立/分散、未绑定和多层裂缝。突破床边界的大量裂缝提供了有关层理接触面的内聚粘合强度的概念，并为构建具有多个裂缝层的裂缝地层学铺平了道路，这些裂缝层被不同粘合强度的界面或延性床层分开。3D 裂缝几何形状还可以提供一些关于裂缝类型和模式以及产生裂缝的地质力学条件的信息。