Logging Evaluation And Interpretation Of Low Resistivity Oil Reservoir In Sudan Six Districts

For a long time,people use resistivity logging to identify oil and water,but because of the difference between the resistivity of the low resistivity reservoir and the resistivity of the water,it is easy to be wrong in the conventional log interpretation.Low resistivity oil reservoirs have the characteristics of strong concealment and great potential of exploration and development.Therefore,it is of great significance to search for the missing low resistivity reservoirs.Sudan District Six N Oilfield has a large number of low resistivity reservoir,significant production,97 wells have 24 wells appeared in the low resistivity oil layers and heavily concentrated in the AG group.So this article,through the collection of N Oilfield Logging Data,core analysis and production test data,for the low resistivity reservoir mainly in the AG group system in-depth analysis and research.Through the analysis of N Oilfield regional geological background,the rock physics information and combined with the logging information on the genetic mechanism of low resistivity reservoirs in the area,that poor physical properties and high clay content,illite and smectite mixed layer development and irreducible water saturation is the main reason of the AG group of low resistivity oil reservoir formation.On this basis,this article puts forward the suitable method for the identification of the identification of low resistivity reservoirs in the region,including the deep lateral,crossplot and resistivity porosity crossplot,MDT identification of low resistivity reservoirs and reservoir profile to identify the low resistivity reservoir.This article in N Oilfield water saturation model found Indonesian model is not suitable for the low resistivity reservoirs of the study area,based on this proposed for the region of J function calculation method of low resistivity oil and gas reservoir water saturation,in AG group water saturation calculation with satisfactory results,provides new ideas and methods for the interpretation and evaluation of low resistivity reservoirs in N Oilfield.