SYNTHETIC IMAGE LOG
The Synthetic Image Log is a new interpretative track which, in tandem with a cross-plot, gives the explorationist a diagnostic tool for understanding well logs.
Unconventional reservoir example of an enhanced interpretation. Tracks left to right: 1. gamma, 2. depth (m), 3. deep resistivity, 4. lithology volumes, 5. static Image Log (FMI), 6. Synthetic Image Log (SIL), 7. Organics (dark red), Effective Porosity (red fill), BVW (blue fill), core porosity (green x), 8. SW, core SW (blue x).
Constructed from the outputs from a petrophysical interpretation, the Synthetic Image Log (SIL) is consistent with the display from a static acquired Image Log such as an FMI log or Earth Imager log. The SIL displays the porosity and the fluids within, providing insight into textural changes, relative fluid volumes, organics content and shaliness from which inferences can be made for completions and fracturing programs. Unlike an acquired image log, it uses the deep resistivity curve and therefore describes the reservoir at a greater distance than the near-wellbore view shown by an FMI or other image log.
Unlike a standard petrophysical interpretation which focuses on net pay, average porosity and saturation, the SIL takes the team farther by allowing inferences on productivity to be made.
The Synthetic Image Log requires just a basic suite of log data (gamma, neutron, density, PE, resistivity). This means that legacy wells can be easily and inexpensively incorporated into large mapping projects, better decisions can be made for completions and fracturing and more confidence in quantifying reserves.