Technical Report from the year 2012 in the subject Geography / Earth Science - Geology, Mineralogy, Soil Science, grade: B, Robert Gordon University Aberdeen, language: English, comment: The section on source is excelente., abstract: This report has been written to describe the basic understanding of the petroleum system on the N'SANO field offshore Cabinda in Angola. The N'SANO field was discovered in 1992 and is located on Block 0 offshore of Cabinda province in Angola. The Block 0 is mainly divided into three source rock Megasystems which are associated with three distinct geologic packages. The Bucomazi formation is the most prolific source rock in the Area A of Block 0. The source rocks for the Bucomazi are kerogen of type I and type I-II, the migration is mostly fault related (vertical), the reservoirs are sandstones of synrift and postrift age, sealed by transgressive marine shales of Cenomanian-Eocene age. Key words: Petroleum geology; source rock; reservoir rock; migration; trap; seal

Technical Report from the year 2013 in the subject Materials Science, grade: B, Robert Gordon University Aberdeen, course: MSc Oil and Gas Engineering, language: English, comment: Well Done , abstract: A high pressure gas cooler located in an offshore platform have been operating for more than 10 years. Throughout that period the gas cooler have been subjected to several tube failures, the failures have caused gas leak from the tube side. Several materials upgrades have been used to contain the tube failure. The last choice was to use a more corrosion resistant material Hastelloy C22. Crevice corrosion has been reported as the primary failure mechanism. The tube and tube plate joined surfaces have been exposed to high temperature which is relatively higher than the critical crevice temperature of Hastelloy C22. There was a poor heat transfer between the shell side fluid and tube side due to a small heat transfer area and low fluid velocity in the affected zone. Stress corrosion and fatigue corrosion accounted for the secondary failure mechanism which ultimately caused a crack in the tubes. Other possible reason identified to cause crevice corrosion was the mechanical rolling expansion technique. Oftentimes it creates rear crevices on the tubes with enough geometry to develop crevice chemistry. Mitigation methods such as hydraulic expansion technique, heat treatment for residual stresses and baffle design enhancements have been proposed in this report. Key words: shell and tube heat exchanger failure; Hastelloy C22 material; tube failure; localized corrosion; crevice corrosion; internal pitting corrosion

Technical Report from the year 2013 in the subject Chemistry - Materials Chemistry, grade: A, Robert Gordon University Aberdeen, course: Master of Science in Oil and Gas Engineering, language: English, comment: "A thoroughly professional job. Well done.," abstract: The corrosiveness of three different types of water was analysed through an experiment carried out with iron nails immersed in a bath for a period of 25 days. The types of water used during the experiment were respectively synthetic seawater, mineral water and sparkling water. The iron nails immersed in a bath of both synthetic seawater and mineral water suffered a corrosive attack characterized by the formation of reddish brown flakes which have adhered the surface of the iron nails. Whilst, on the other experiment, the iron nail immersed in the sparkling water suffered a very minimal corrosive attack owing to the formation of a protective layer which prevented the underlying steel from further dissolution.