Thin Laminated Gas Bearing Sequences, Gas Finder A New Approach Of Petrophysical Evaluation, In Mexico

摘要

Traditional petrophysical well evaluation, is able to show an integrated analysis where the log information is transformed into a lithology, water, oil, gas saturation curves, along a specific interval of a well. This method, is not able to predict how much the production of those intervals could be, when completed.With this new methodology the same approach is used, but magnetic resonance and pressure data, is integrated.As magnetic resonance, allows the discrimination amongirreducible and moveable fluid saturation and also indicatingthe better permeability zones, it is used as a guide for the pointselection for the modular dynamic formation tester. Based onthis data set, the pressure, a skin factor is determined and therelative permeability to the reservoir fluid, is defined.In low resistivity reservoirs, were the traditional calculationcould show high water saturation, the new technology willallow the engineer to discriminate if the water is going to flowor not, maximizing the reservoir potential.Having defined the lithology, pressure, permeability, fluidsdistribution and fluids saturation a synthetic production flowprofile log, can be generated for each selected interval,allowing an optimized selection of the best possible intervalsor overlooked zones, maximizing the final production of thewell.In conclusion, new technology and power full computercalculation have a big impact in the well completion andproduction maximization of reservoirs.