The study of efficiency of increase of fluid production in long-term developed fields

Abstract

As is known, one of the most effective methods of increase of oil development for the mature production fields is the forced fluid withdrawal (FFW). In this respect, the bypassed oil, lenses, blind and dead zones, and low-permeable interlayers are involved in the development of non-homogeneous and heavily watered formations. The decision on the employment of FFW should be made only after the study of the correlation between the flow rate of oil, water, fluid, as well as the water cut. With the purpose of the evaluation of the efficiency of FFW application, the researches based on the actual field data of the well operation in Lokbatan and Gala fields of “Azneft” PU have been carried out. Thus, the dependencies of the flow rate of oil, water and water cut of the product on the flow rate of fluid by all reviewed wells have been developed on a system approach and analyzed, as well as the mathematical models have been found. The analysis and estimation calculations justified the capacity of an approximately 7 % increase of oil production due to the forced withdrawal by the reviewed pattern of wells in Gala field. The studies conducted on the field data justify the practicability of the employment of forced fluid withdrawal in the wells operated from the upper stage of Productive Series in Gala field.