Gas-dynamic methods of well research as a tool for complex improvement of the efficiency of gas re-injection into the gas cap of the Novoportovskoe Oil and Gas Condensate Field

Summary The article presents an approach that allows to evaluate the efficiency of gas re-injection into the layers of the Novoportovskoe Field, detect the reasons of injection rate decrease, and analyze the impact of gas injection on the development of the oil layers. The method is based on gas-dynamic tests of wells. The development of the field began in the absence of outside gas infrastructure. For the purpose of rational utilization of associated gas, until the outside gas infrastructure is ready, it was decided to re-inject gas into the main reservoirs. The reservoirs are represented by fringes of the marginal and underlying type. There is a risk of a gas breakthrough to the producing wells. It is necessary to optimize the re-injection of gas in order to equalize the reservoir pressure profile and increase oil production. The current task is to monitor the re-injection of gas, targeted management of gas injection wells, which will allow to inject the necessary volumes and get additional oil production. Based on the assessment, measures are proposed to recover injection coefficients. Timely diagnosis of the causes ensures the rational use of associated gas by the planned gas injection well stock.