Innovative Self-Sufficient Casing Head Gas Compressor Technology to Improve ESP Performance and Reduced CO2 Emissions

Objectives/Scope:

The objective of this trial was to develop an engineering solution facilitating the continuous release of accumulated casing gases into the production flow system. This solution aimed to address several key goals, including enhancing Electric Submersible Pump (ESP) performance, extending its operational lifespan, optimizing well productivity, and reducing CO2 emissions associated with manual gas release procedures. By focusing on these objectives, the trial sought to improve the efficiency, reliability, and environmental sustainability of ESP systems in oil and gas production operations.

Methods, Procedures, Process:

The trial focused on ESP wells in NK field, often producing below bubble point pressure without adequate pressure support, leading to continuous gas release at the pump intake. This gas accumulation posed operational challenges, including frequent ESP trips, increased operating costs, and environmental concerns due to manual gas release. To address this, the concept of Casing Head Gas Compression (CHgC) in a self-sufficient and closed-loop system was developed to optimize ESP performance, sustain oil production and coincide with environmental rules & regulations.

The trial underwent several stages, including challenge identification, candidate selection, business case development, Management of Change (MOC) process, execution, and rigorous evaluation.

Results, Observations, Conclusions:

The trial spanned five months, during which ESP performance and CHgC technology reliability were rigorously evaluated. Notably, no ESP trips due to gas entrapment were recorded during the trial period. Liquid rate improved significantly, reducing ESP motor temperature by 11 ℉. Production deferment was eliminated, and casing pressure was maintained below 30 psi.

By continuously releasing well annulus gas, stabilizing pump intake pressure, and increasing liquid level on top of the ESP, the trial paved the way for ESP optimization and improved well productivity.

This paper outlines the approach from candidate selection to pilot execution and evaluation, highlighting the lessons learned for continuous improvement and optimization.

Novel/Additive Information:

The novelty of the CHgC technology lies in its ability to provide a self-sufficient surface engineering solution for ESP gassy wells. The closed-loop installation feature reduces CO2 emissions and ensures compliance with environmental regulations.

Innovative Self-Sufficient Casing Head Gas Compressor Technology To Enhance ESP Performance and Reduced CO2 Emissions.