Oil and Gas Production

In: Science

Submitted By aadu
Words 1049
Pages 5
Purpose of Oil and Gas Separation on Offshore Structures
Reservoir fluid is a complex mixture of gas, oil, water, solids and other contaminants that must be separated and processed. Separation is the process whereby reservoir fluid is separated into its component phases of gas, liquid and solid. The separated products are further processed to sellable, reuseable and disposable quality after separation.
Reservoir fluids are usually gathered in an Oil and Gas production facility where separation and processing takes place. If the well location is in a deep offshore location, the cost of laying long distances pipelines to onshore processing facilities might make the project to be uneconomical. When it is uneconomical to lay long distances pipeline to onshore facility, the reservoir fluid is separated into its component parts and stored on offshore platforms like the Floating, Production, Storage and Offloading (FPSO) facilities. Periodically, vessels go to the FPSO to load products and transport such to the customers. A new area being exploited is the floating liquefied natural gas (FLNG) facilities where processing of gas to LNG can take place.
Oil and gas separation is also carried out offshore in order to avoid flow assurance issues associated with transporting reservoir fluid from long distance offshore location to onshore processing facility. Some of these issues are hydrates formation, wax deposition, asphaltenes problems, corrosion etc. All these happen when there is a hydrocarbon-water mixture.
Separating water from oil and gas on an offshore platform will also reduce the cost of waste disposal as separated water can be treated on the platform and reinjected or disposed off immediately. A smaller (less expensive) diameter pipeline size will then be required to transport oil offshore rather than a bigger, more expensive pipeline size that will be required…...

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