Title : Diagnosis of increasing water cut and water shutoff application: El feel oil field-case study
Abstract:
Excessive water production represents a major industry challenge because of its serious of impacts on economic and environmental. Several techniques have been applied effectively to extend the productive lives of mature oilfields and minimize water production rates. However, selecting a specific technology for a given reservoir is a big challenging task for the engineers because of the associated geological and technical complexities and the absence of efficient screening tools.A comprehensive review for the worldwide field projects was conducted to develop an integratedsystematic methodology that determines the applicability of four Producing wells to gain bestproduction optimization.
These wells are located in Elfeel field belongs to Millitah Oil Company. The results indicated thata comparison with standard water diagnostic plots by “Chan” indicates source of water was bottomwater coning for (FA01 & FC03) and a channeling issue for (FB18 & FD32). This was confirmed by the measured produced water salinity (reduced by time and getting closer to the water injection salinity ''4600 to 3300 mg/l''). On the other hand, the remaining reserve of the four production wells was quite considerable. In fact, the most important section in any water shutoff operations is how to diagnosis and analysis the problem accurately, Also increasing oil production, and saving water handling costs is achieved by Accurate investigation for this phenomenon.
This study has been applied to identify the type and source of the excessive water production in a certain well is by studying the offset wells’ water cut behavior, Also to Reduce excessive water production usually by gathering and analysis all available reservoir and production data. In addition to, in the water shutoff operation, it is necessary to make an accurate diagnosis of the problem. and it is essential to detect the layers that contains high water ratio, the heterogeneity of the reservoir rocks, the schematics of the wellbore and production mechanisms. And finally, to Find the best solutions that lead to better conformance in the reservoir as well as blocking the unwanted water production zones, according to and based on the results, program of the workover design will be implemented to avoid the increasing in the water cut. Prosper Model have been used, optimum ESP design led to produce with minimum quantity of water and increase in the oil recovery, Also Gap Model helped us to make forecasting and knowing the abandonment date for each well. Extending life of the wells have been achieved then oil recovery also improved.
