Research Progress of Underwater Gas-liquid Separation and Pressurization Technology and Equipment

Abstract

In recent years, in order to solve the problems of low reservoir pressure, high back pressure at the wellhead, hydrate clogging and high viscosity of oil in the extraction of subsea oil and gas fields, the industry is researching and developing new gas-liquid separation and pressurized transport technologies to improve efficiency, reduce energy consumption and cost, and promote the sustainable development of offshore oil and gas. By analyzing seven advanced foreign underwater projects and three conceptual design cases, we summarize their equipment structures, technical parameters, advantages and challenges, which provide important experience for future technology development. These projects have significantly improved efficiency, reduced energy consumption and enhanced safety by optimizing the separation process and pressurization technology. In the future, with the deepening of deep-sea development, underwater separators will develop in the direction of larger aspect ratios and higher pressure-resistant grades to adapt to extreme environments such as high pressure and low temperature in the deep sea. Therefore, it is necessary to continue to promote technological innovation to meet the strict demands of deep-sea exploitation and provide stronger technical support for offshore oil and gas development.