Challenges and Solutions in Managing Water Breakthrough in Heterogeneous Reservoirs

Using Inflow Control Valves and ESP Systems

Abstract

The use of electric submersible pumps (ESPs) in heterogeneous reservoirs presents unique operational challenges, particularly when dealing with water breakthroughs, a common problem exacerbated by geological features such as faults and fractures. In such environments, water intrusion can significantly impact the efficiency of artificial production systems, resulting in reduced oil production and increased operating costs. Inflow control valves (ICVs) were used as a mitigation strategy to regulate fluid entry and minimize water inflow. However, their effectiveness is often compromised in complex reservoir conditions, necessitating a more in-depth study of optimization methods. This paper focuses on the challenges of managing water breakthroughs in wells equipped with ESP systems. It examines the effects of reservoir heterogeneity on water breakthrough, the resulting impact on ESP performance, and the limitations of using ICVs as a control mechanism in such scenarios. A detailed analysis shows how fractures and fault lines contribute to uneven water distribution, accelerate the formation of water ridges, and reduce the efficiency of ESPs. Additionally, the paper provides insights into the operational difficulties encountered in ESP implementation in these complex environments and discusses strategies to improve water management. Key recommendations include improvements in well design, real-time monitoring and adaptive control systems to optimize ESP performance and extend well life. Advanced techniques for predicting water breakthrough patterns and implementing proactive measures to mitigate impacts are also proposed, providing a more comprehensive approach to managing water production in heterogeneous reservoirs.