Gas Production Rates - Xodus Group
Client: Confidential
Location: Black Sea

Sustaining future gas production rates.

Xodus Group’s integrated team manage a compressor upgrade project and accelerated engineering programme for an offshore brownfield development.

A decline in production rates of non-associated gas (NAG) and an increased requirement for Liquefied Petroleum (LP) gas compression required the reconfiguration of LP, High Pressure (HP) and NAG compressors in an offshore brownfield development in the Black Sea.

Xodus Group was tasked with:

  • Managing the upgrade project within a highly congested area, to a very tight budget and schedule
  • Incorporating significant changes, with minimal existing asset as-built drawings for reference
  • Providing detailed Front End Engineering Design (FEED) to allow the detailed design contractor to validate and commence the design phase easily without a further study
  • Adhering to strict project controls, including management of change and progress reporting at level 4 planning (deliverable level) in order to focus on forecast and potential overrun.

Assignment scope
Xodus provided a multidisciplined team who collaborated closely with client personnel to achieve the following key activities:

  • Reconfiguring the LP, HP and NAG compressors to sustain gas production rates
  • Evaluating and specifying compressor package modifications
  • Introducing a new 10-in. flare header to collect and dispose of relief and blowdown loads generated from the new configuration
  • Managing compressor and PCS vendors in scoping upgrade requirements, including several vendor visits
  • Providing equipment change out procedures
  • Providing execution cost and schedule information
  • Generating the project within a 3D model environment using point cloud and PDMS interfaces
  • Extending FEED beyond the typical boundaries into detailed design with significant Engineering, Procurement and Construction (EPC) contractor interfacing easing the transition to detailed design including the goal of achieving procurement of long lead items
  • Retaining key engineering personnel beyond FEED into the design phase to complement the transfer
  • Adopting review point methodology of technical, safety and project reviews with appropriate stakeholders to accelerate the completion of deliverables by reducing the iterative approval cycles, applying a ‘fit-for-purpose’ solution and avoiding preferential ‘nice-to-haves’.


  • Successful execution of 40,000 man-hour, 77 week overall FEED and accelerated engineering programme on time and within budget
  • Significant EPC contractor interface and transfer of knowledge ensuring detailed design phase commenced without delay
  • Follow-on requirement for key personnel to aid the detailed design transition and act as technical focal point in design
  • Successful application of review point methodology adopted in subsequent projects.