Grampian Consulting - Flow Assurance and Operability
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Experience

We have been involved in a large number of successful projects from the conceptual stage to detailed design, including the troubleshooting of live production systems.​ 

​Our collective experience includes the support of oil and gas projects in the Gulf of Mexico, North Sea, West Africa, South America, Western Australia and Northern Russia for shallow and deepwater subsea developments as well as land based pipelines and production networks.
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Grampian Consulting has global experience in Flow Assurance and Field Development projects.
Some of our more recent projects of interest include:

Gulf of Mexico (Execution)

Led the steady state and transient thermo-hydraulic analysis of a tie-in to the electrically heat traced pipe-in-pipe. Analysis was performed for the production and chemical injection systems to verify operability, assess the impact to the existing flowline, and provide input to control philosophies and interlocks to ensure the system can be operated as intended.

Land Based Gas Network (Study)

Hydraulic analysis of the 713-mile gas pipeline network included determining hydraulic capacity for various zones/segments, considering various flow scenarios from each of the multiple compressor stations, and interfacing with process engineers to determine flow constraints related to pipeline/machinery.
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West Africa (Operations Support)

​Construction and benchmarking of an OLGA model to represent a producing field, which operates in 4,400 ft. water depth. A number of simulation cases were performed to assess various hydrate management strategies for the production system based on operating a dual flowline system as a single line, including remediation of a potential blockage in the riser. Additional analysis was performed on the gas export pipeline to assess the propensity for liquid drop-out and impact of operations such as depressurization and re-pressurization using Compositional Tracking.

Gulf of Mexico (FEED / Execution)

Development of the FA Design Premise as well as steady state and transient analysis for an electrically heat traced (EHT) pipe-in-pipe flowline in a water depth of ~6,600 ft. The scope included line sizing, hydraulic analysis, thermal analysis and sizing of the chemical injection lines. A number of transient cases were performed to land the hydrate management strategy for the single line tie-back, with and without electrical heating. 

West Africa (Concept Select)

South America (Flow Assurance Study)

​Managed the Flow Assurance work package for a 20 well field development to a FPSO located in >9,000 ft water depth. The scope included fluid characterization, determining steady state and transient performance of the system production system, determining MEG and methanol volumes, sizing the chemical injection system, developing the hydrate management and Flow Assurance strategies and supporting the development of systems level documents related to Tier 1 decisions.
Steady State analysis was performed for verify the thermal and hydraulic performance of selected concept including line size, erosion limits and U-value. We participated in a number of Flow Assurance reviews with the Operator discussing the results of their analysis as well as Phase 1 and Phase 2 operating strategies. We were also tasked with generating material for, and participating in, a facilities peer assist, and formulating responses to FA related questions from Senior Management.

 West Africa (Pre-FEED)

North America (Optimization Study)

Led a flow assurance study consisting of steady state thermo-hydraulic analysis of the production system including transient analysis to verify cooldown times for the phased development. The scope also included line sizing for the water injection, gas injection, gas lift and chemical injection systems. We also managed third party studies to determine the Scaling and Souring potential for the field. Additionally, we supported the development of the RFP package aimed at generating a supplier led solution for EPCI, and participated in technical evaluation of the bidder responses.
We performed hydraulic analysis of gas system which included determining the maximum throughput of a pipeline with an existing 12” NB section currently in operation, then optimized the downstream line size and compression requirements for the new 48 km bullet line to the LNG plant. The scope also considered gas cycling between multiple lines and compressor stations along the mountain route.

West Africa (Pre-FEED)

Gulf of Mexico (Execute)

​Led the Pre-FEED systems layout and technical design; coordinated multi-discipline engineering team to develop nine conceptual layouts to evaluate multi-well tie-in to either an existing subsea system or existing FPSO, including schematics, equipment lists, and costing. Aligned concept ranking with project objectives to enable the operator to determine the preferred option. Identified capacity issues in the existing control system then worked synergies between developments to utilize remaining FPSO slots. Simultaneously directed flow assurance scope for steady state analysis of the concept options, as well as transient analysis for the FPSO tie-back option with focus on operability and liquid handling.
​Executed engineering for flow assurance, trees, flowlines/risers, umbilicals & distribution, MCS/SPCU, HPU, chemical injection and UPS. Provided technical support to the integrated project team for all work packages to ensure seamless component make-up and functionality. Promoted the use of processes and ensured compliance with specifications and philosophies. Fostered development of project deliverables and construction activities, and provided technical resolution where necessary. Supported installation, commissioning and operations throughout.

Subsea Field (Flow Assurance Study)

Gulf of Mexico (Operations Readiness)

​Assessed uninhibited and inhibited corrosion rates for a range of field types, fluid properties and CO2 concentrations using NORSOK M-506 and de Waard ‘98 corrosion models to provide a recommended operating envelope for a subsea system where the potential for corrosion related failures existed. 
​Performed fluid characterization and used phase properties to construct a calculator to allow for semi-annual testing of the SCSSV and quarterly testing of the USV based on the range of expected flow and test conditions. 
We look forward to seeing what 2023 brings!

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  • Home
  • About
  • Services
    • Flow Assurance Studies
    • Subsea and Systems Engineering
    • Project Support Services
  • Experience
  • Team
  • News
  • Blog