The Lithology Editor

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The lithology editor allows you to build a real or imaginary sequence of rock layers, each characterized by its mineralogy, drilling and log responses. The figure shows a typical sequence, where each layer is characterized by its number, depth, thickness, fracture gradient, its drilling softness S and abrasivity W, the three logging values of Gamma Ray Activity (GA), Resistivity (Res), Porosity (Por), the fluid type and the pore fluid pressure gradient. Each of the layers can be edited or new layers created by using the edit buttons at the bottom of the screen. When you have done this, you can preview the fracture pressure and pore pressure gradients or look at the log response