Corrosion and Corrosion Control
an endless battle against nature
Corrosion risk for gas condensate wells 1) Higher bottom hole temperature may lead to water condensation: The accompanied water vapour is likely to dew out along the flow path 2) Higher CO2 / H2S partial pressure lead to more aggressive…
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Downhole Corrosion Factors 1) Acidic corrodants: CO2, H2S in drilling fluid. 2) Solids: High solids content in drilling fluid prompts the erosion and flow assisted corrosion. 3) Oxygenated conditions: The drilling fluid is often oxygenated during drilling process. 4) Microbial: Microbial…
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Materials Consideration In the system, there are normally multiple materials in use. Some principles include: Austenistic and duplex stainless steel should be with great care to use hydrochloric acid or water with high chloride content; In the system using mixture…
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Well Acidising The acid is pumped into well to clean the scale and /or stimulate the production. Normally, large quantity of high concentration of hydrochloric acid, up to 15% w/w, is utilised. The bottom hole temperature of the production well…
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Red Water Red water has a long history in domestic drinking water distribution system. It is always associated with problems of water flow restriction, and water quality deterioration. The discolouration is caused by very fine iron, manganese and clay particles that…
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