The Analysis of Key Technologies of Hydraulic-controlled Intelligent Completion at Home and Abroad

Abstract Hydraulic controlled intelligent well completion technology is a comprehensive system engineering covering petroleum engineering, mechanical and electronic engineering, automation engineering, communication engineering, computer engineering and other disciplines. The foundational innovation revolves around continuous subsurface data surveillance and advanced fluid flow management systems in downhole environments. Through the throttling regulation characteristics of intelligent water distribution valves, differential management of flow rates in various reservoir layers or branch channels can be achieved. This enables precise adjustment of fluid production dynamics, dynamic control of development processes, and optimal allocation of production capacity benefits in oil reservoirs. This paper examines the technological evolution trajectory of hydraulically-actuated intelligent completion systems within global industry benchmark projects. By employing a multi-dimensional evaluation framework, it conducts in-depth analysis of core technologies, specifically investigating the signal transmission mechanisms and pressure-resistant sealing performance metrics of downhole electro-hydraulic wet-mate connectors, as well as the dynamic response characteristics of subsurface fluid-controlled flow regulation valves, with emphasis on their synergistic operational mechanisms in key technical modules. Considering the prevailing technological constraints and operational characteristics, this approach is deeply integrated with the development realities of China’s oil and gas fields. The paper systematically elucidates the industrialization prerequisites and core technological challenges in developing hydraulically-actuated intelligent completion systems within China’s specific context. By establishing a theoretical framework tailored for complex geological environments, it formulates technical roadmap benchmarks to guide the industrial-scale implementation of intelligent completion technologies in Chinese oil and gas fields.