B000109: mudanças entre as edições

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|data=$a Abstract: Drilling fluids, commonly used in oil well drilling, are responsible for bringing the drill cuttings from the drilled rock to the surface. Some of the raw materials used to make these fluids have the potential to cause damage to the marine environment, and as the fluids can stick to the drill cuttings, even after treatment, their disposal on the high seas is limited and may require transportation to dry land. Although, in general, there are different treatment and final disposal technologies available for waste, their technical applicability and economic viability for drill cuttings need to be studied. This study proposed a Life Cycle Costing (LCC) model to analyze different scenarios for oil well drilling activities, with an emphasis on the treatment and final disposal of drill cuttings. To achieve this, a systematic literature review was carried out to identify existing LCC methods, using the STARR-LCA methodology in an adapted form. Two stages were defined for this review: a quantitative survey which returned 7,322 articles, and a qualitative survey with 28 articles and 2 books. The 30 selected papers were used to identify the LCC methods and grouped according to their similarities, totaling nine groups, six of which were used as the basis for proposing the model applied in the case study of this research. It should be noted that this model can be applied to other case studies in the oil sector. Based on the drilling stages defined for the case study, an inventory of economic data was carried out, prioritizing primary data. The LCC was applied to eight scenarios of oil well drilling activities using the Microsoft Excel tool, considering the combined use of two drilling fluids and four treatments/final disposal of drilling waste. It was found that the fluids have a major influence on the cost of the scenarios, with the four lowest cost scenarios being those that used non-aqueous drilling fluid (NADF), while the four highest cost scenarios were those that used water- based drilling fluid (WBDF). Among the scenarios that used the same type of fluid, what determined the highest or lowest cost was the treatment or final disposal. The scenario with the lowest cost for the case study is H, made up of using NADF and disposing of the waste at sea, while the scenario with the highest cost was A, made up of using WBDF and incineration. The stage with the highest cost is 3, which involves drilling the wells, representing between 89.91 and 99.92% of the total cost of each scenario. This shows that the costs of the other stages are very low compared to stage 3, which justifies taking environmental aspects into account when making decisions.

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