An experimental study on the effects of internal tubular coatings on mitigating wax deposition in offshore oil production
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As the demand for petroleum resources increases, and oilfields on lands and in shallow-sea become exhausted, the areas for oil productionare expanding to the deep sea and therefore technologies for flow assurance are coming into the highlight. In low temperature environment such asthe deep sea, wax is accumulated and prevents stable oil production. Therefore, the development of flow assurance technologies is required. Wax isprecipitated in crystalline form when the oil temperature decreases below the wax appearance temperature; it then accumulates on the inner walls ofpipelines causing blockages. In particular, in subsea pipelines, which have a large surface contact area with the surrounding seawater, wax depositionproblems are frequent. The internal tubular coating can effectively reduce wax deposition without pausing oil production when the coating isappropriately designed. This study carried out wax deposition tests on a number of internal tubular coatings under single flow conditions. The resultswere analyzed for the effects that the physical properties of the coatings had on wax deposition.
Abstract
As the demand for petroleum resources increases, and oilfields on lands and in shallow-sea become exhausted, the areas for oil productionare expanding to the deep sea and therefore technologies for flow assurance are coming into the highlight. In low temperature environment such asthe deep sea, wax is accumulated and prevents stable oil production. Therefore, the development of flow assurance technologies is required. Wax isprecipitated in crystalline form when the oil temperature decreases below the wax appearance temperature; it then accumulates on the inner walls ofpipelines causing blockages. In particular, in subsea pipelines, which have a large surface contact area with the surrounding seawater, wax depositionproblems are frequent. The internal tubular coating can effectively reduce wax deposition without pausing oil production when the coating isappropriately designed. This study carried out wax deposition tests on a number of internal tubular coatings under single flow conditions. The resultswere analyzed for the effects that the physical properties of the coatings had on wax deposition.
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