Objective
The aim of the project was to design methods and equipment specially adapted to produce and discharge the oil from rospo mare field, which is paraffinic, heavy (11 degrees api), has a high sulphur content (6 % by weight) and a high viscosity (2200 cst at 40d.C). Although the asphaltene content is high (17 % by weight), asphaltene deposits appeared low, owing to the naphtenic dominant of the complex.
Optimization of the production system has been continued outside the project by building an experimental platform on the rospo mare site.
Preliminary study of the pumping facilities eliminated the possibility of centrifugal pumping, the efficiency of which drops too sharply as the oil viscosity rises. Long-stroke pumping transpired to be the most attractive method,since it offered better filling of the bottom hole pump, less fatigue on the rods and took up less area on the surface. A novel measuring bench was built enabling the filling coefficient of the bottom pumps to be accurately evaluated for highly viscous fluids. Long-stroke pumps were tested in this way and it was observed that the downward motion of the piston is difficult to accomplish in the viscous crude, whence the recommendation of use drill collars at the bottom of the well.
Study of flow problems on the surface was centered mainly on transporting the crude in an emulsified form. Laboratory research and tests on a semi-industrial circulation loop showed that by creating a direct emulsion of the oil in water, with an optimum water content of 40 %, onecan obtain an emulsion viscosity of about 100 times smaller than that of the anhydrous crude. But there was a lack of stability of the direct emulsion in the event of stopping flow. An emulsifier was selected, delaying the segregation.
Study of the problems of separation, treatment and desalinisation has shown that indirect emulsions form spontaneously and are stable and relatively difficult to break down : simple decantation adding a chemical is not enough and one has to use an electrostatic installation operating at a temperature of about 100 d.C.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
92500 Rueil Malmaison
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.