Zohreh Movahed

Fault Interpretation Using Image Logs

In oil and gas reservoirs, having the faults attributes such as dip inclination degree, dip azimuth, strike, location of the faults and the type of the faults is essential due to their effect on production rate. Therefore, in this work a new method will be introduced to provide this geological information. By using the Formation Micro Imager (FMI) tool, the fault interpretation job will be done in one of the Iranian production wells, located in Gachsaran field.

The Effect of Tar on the Petrophysical Analysis of FMI in Asmari Fractured Reservoir

Historically, in Iran, the borehole imaging tools as the FMI/FMS are acquired to locate major structural features, such as faults and fractures and sedimentary environment interpretation, and it has more advantages to the conventional methods for reservoir characterization. Petrophysicists and geologists by using this new method and suitable software (Geoframe) do a credible characterization in oil reservoirs. Prediction of the index permeability is a distinct advantage of image logging, because of the addition of orientation and dip data provided. Significant heterogeneity in these bitumen reservoirs is found in all dimensions, and predicting reservoir continuity is challenging. The textural heterogeneity corresponds to an extreme permeability variation that is the controlling cause in reservoir production. Because of the large vertical resolution, contrast amid cores (actual scale), and conventional logs (averaged responses over a few meters), extrapolation of small-scale heterogeneity into uncured wells using a traditional approach is unreliable. In this well, after comparison, image log average resistivity recognized that formation resistivity is particularly high (dolomite) in the porous layer and fracture zones.