Increasing the efficiency of development of reservoirs with low-pressure natural gas using ejector devices

An analysis of the current conditions of development of unique natural gas fields in Western Siberia reveals that these resources are entering the final development phase. This phase is characterized by critically low pressures insufficient to transport gas to the wellhead. At present time, the share of low-pressure gas reserves increases, but techniques and technologies do not provide efficient and cost effective production. The aim of this study is to develop a universal decision to enhance the extraction process of low-pressure natural gas from the depleted Cenomanian production horizon based on commercial introduction a gas ejector. A gas ejector is device in which the total pressure of the gas flow boosts through turbulent mixing with a higher-pressure flow. This necessitates an analysis of three installation options for the ejector: in the production gas well, at the wellhead, and in the gas collection network. A comprehensive analysis has determined the optimal geometric parameters and operating characteristics of the ejector based on numerical calculations. Modelling of the ejector operation process in hydrodynamic simulator was performed and technological indicators of object development were calculated. Additionally, a technical and economic justification for the design solution has been provided, and the most effective placement of the gas ejector in low-pressure gas fields has been selected.

gas ejector, ejecting devices, low-pressure natural gas, high-pressure natural gas, Cenomanian gas reservoirs, Achimov gas reservoirs