The Beacon Offshore Energy-operated Shenandoah field ramped up its four Phase 1 development wells to its target rate of 100,000 BOPD/117,000 BOE/D in October 2025. Located approximately 150 miles off the Louisiana coast in the Gulf of Mexico (GOM) Walker Ridge 52, the Shenandoah floating production system (FPS) has been placed in service with a nameplate capacity of 120,000 BOPD and 140 MMcf/D.
The target rate was achieved within 75 days after first production in July 2025.
The Shenandoah FPS was designed as a regional host facility, enabling the development of additional resources, including Beacon-operated Monument and Shenandoah South. Together with Shenandoah, these discoveries are expected to contain nearly 600 million BOE of recoverable resources. Partners in the Shenandoah development include HEQ Deepwater (20%) and Navitas Petroleum (49%).
The Shenandoah reserves, at reservoir depths of roughly 30,000-ft true vertical depth, are being developed using 20,000-psi high-pressure technology. Beacon expects this approach to support the development of other similarly situated fields in the Inboard Wilcox trend.
The Shenandoah field is the second 20k-psi deepwater GOM development to come onstream, following Chevron’s Anchor project which began production in August 2024.
Successful oil production in high-pressure/high-temperature (HP/HT) subsea developments such as Shenandoah depends on managing interrelated flow assurance and integrity challenges, according to technical insights shared by Clariant Specialty Chemicals, which provided production chemistry services to support the project.
- Flow assurance solutions. To prevent hydrate formation, wax deposition, and asphaltene precipitation common in subsea flowlines, HP/HT environments require chemical inhibitors engineered for these conditions. Clariant utilized its ADAPT measurement system to provide continuous, real-time monitoring to ensure optimal performance by evaluating inhibitor effectiveness in unaltered crude oil, rather than relying on conventional forced-precipitation test methods.
- Corrosion management. A corrosion inhibition program to protect subsea infrastructure and maintain long-term asset integrity is required. The chemical treatment strategies were paired with recommended field-monitoring programs to ensure performance is met throughout the field’s life cycle.
- Scale prevention. HP/HT reservoirs are susceptible to severe scale formation. To combat this issue, customized scale inhibitors must be able to perform under extreme conditions and be compatible with other production chemicals and reservoir fluids.
- Production optimization. Emulsion breakers, primary and secondary defoamers, and water clarifiers support efficient separation and processing while helping to maximize recovery and minimize operational disruptions.
Shenandoah’s next steps include an expected increase of the FPS's capacity to 140,000 BOPD by early 2026, installation of a subsea pump, and the drilling of two additional development wells.
