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These capabilities have been developed on long-offset, deepwater, subsea development projects for several clients. INTECSEA has made significant contributions in the assessment of system operability issues and in developing operating philosophies and strategies to avoid the formation of hydrate or wax at any time during system operation. Production and Flow System Operability Operability is intrinsic to the Flow Assurance and System Design Process. INTECSEA can examine a range of operational constraints to evaluate the slug catcher size and operational procedures. Liquid management in large complex offshore gas-condensate projects, is a challenging issue. The use and/or design of slug catchers are part of the overall system hardware and operational design. Where possible, and particularly for oil/gas systems, it may be preferable to use separator inlet chokes (possibly brought into play by the level control circuitry) to control separator liquid ingress and/or dump rate, and the resultant separator volume. Slug Prediction and Slug Catcher Sizing In general, for offshore floating and/or platform-based systems, slug catchers are undesirable from a weight and space perspective. INTECSEA personnel have extensive experience in the management of scales along with their prevention and remediation. Scale formation may be due to changes in temperature, pressure, out-gassing, shifts in pH, and contact with incompatible brines. Understanding of scales formation and their prevention/remediation are important for seamless operation of oil and gas production facilities.
#Commingling in pipesim simulator
The OLGA transient multiphase simulator is used for dynamic simulations such as startup, shutdown, slugging, and pigging. Life of field simulations are performed to examine the operability of the system with time. Schlumberger’s PIPESIM or FEESA’s Maximus multiphase simulator is used for steady state, multiphase, thermal-hydraulic simulation of both single-line and network models. Insulation characteristics of downhole production tubing and subsea flowlines are realistically modelled. When tuning data is available, fluid characterizations are developed. In performing thermal-hydraulic simulations, fluids are modeled with black oil and/or compositional models, as appropriate and as detailed compositions are available.
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Important system parameters established as part of the design effort include tubing and flowline diameters, insulation, chemical injection requirements, flow blockage intervention provisions, host facility requirements, capital and operating costs, operating boundaries, and risk mitigation. To assure that the entire system can be designed to operate successfully and economically, system designers must consider flow assurance fundamentals such as reservoir characteristics, production profiles, produced fluid chemistry, and environmental conditions. Successful system designs must be developed with system unknowns and uncertainties in mind and should be readily adapted to work with the system that is found to exist after production starts, even when that system is different from what was assumed during design. Flow assurance designs must consider the capabilities and requirements for all parts of the system throughout the entire production life of the system to reach a successful solution. Capability Overview Flow assurance encompasses the thermal-hydraulic design and assessment of multiphase production/ transport systems as well as the prediction, prevention, and remediation of flow stoppages due to solids deposition (particularly due to hydrates and waxes).