Adjusting of the annular pressure in wells blocked by presence of gas optimize the production in Cira Infantas field

Abstract

The oil and gas industry has been traditionally recognized throughout history due to its facility to evolve in topics related to resources exploitation and development. Previously, an oil field could be considered non-profitable when it reaches low oil production rates or high operational expenses resulting in its abandonment. A useful starting point for this article is the study of the reservoir fluids behavior. According as a definite volume of fluids is extracted from the reservoir, the system progressively lost energy until the static bottom-hole pressure equals the saturation pressure. At this point, it is released the first bubble of gas and the multiphasic flow appears carrying out particular issues such as gas blockage that directly affects the oil productivity index. In this article, it is exposed a detailed methodology to diminish that concrete problem exhibited in several oil wells from the Cira-Infantas which significantly strikes the well performance. In fact, it was made up a practical methodology taking into count the fluids properties variations and the historic production performance in order to compare the results obtained against a thorough analysis generated by computational modeling in Pipesim flow simulator. Finally, the acquired results were meticulously processed and there were proposed several criteria to identify the suitable wells to be submitted for the same procedure.