Oily solids are generated as a waste product of Brunei Shell Petroleum's drilling and production activities. The main sources are waste oil based mud, tank bottom sludges, and oil contaminated soil. The oily solids are stored in a purpose built holding basin which is gradually being filled up. The need for appropriate treatment and an acceptable means of final disposal of the solids has been recognised as an item for attention in the Company's Environmental Management Plan. The paper describes the resulting feasibility study which is evaluating the relative merits of processes such as incineration, lime stabilisation, and landfarming. The feasibility study is considering the guantity and properties of the solids, the environmental conditions in Brunei, the availability of treatment services in the country, and the need to define acceptable environmental criteria for the treatment and disposal methods. The way in which these factors influence the study are discussed.

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