Multiphase pumps: a response to the challenges of deep offshore development
Multiphase pumps enable effluent to be carried away from production wells without prior separation. Total uses them on all the new Block 17 developments in Angola as they respond to both the technical challenges and the cost reduction requirements that characterize deep offshore hydrocarbon production.
Multiphase pumps respond to both the technical challenges and the cost reduction requirements.
Multiphase pumps (MPPs) are used to carry effluent away from production wells in all three phases – gaseous (hydrocarbons), liquid (hydrocarbons and possibly water) and solid (mineral waste from the reservoir), regardless of the proportion of gas. Boosting the hydraulic energy of a multiphase fluid has many benefits, including an increased flow rate and therefore an increase in production, an improved final recovery factor, the possibility for economic development of marginal fields thanks to the reduction in processing costs, and even the production of several low-pressure wells within the context of a joint high-pressure process.
Relying on its R&D work and bolstered by the lead it has held over the competition for the last 30 years, Total has developed various MPP solutions for each of the three Block 17 deep offshore developments, GirRI, Pazflor and CLOV, in Angola. Each of these solutions satisfies different fluid viscosity, gas proportion and pressure drop requirements for these three production units. Total is continuing its research into the adaptation of MPPs to the deep offshore fields it operates, which are soon to be put into production, but also into new MPP concepts that rise to the challenges of ultra-deep offshore, with water depths close to 3,000 meters.