Desenvolvimento de uma ferramenta para avaliação de integridade na fase de início de poço

Abstract

The construction of an oil well is a complex and multidisciplinary task, as it involves different areas, not just Petroleum Engineering. The well start phase revolves around the operations carried out for laying the conductive casing, drilling the next phase, and laying and cementing the surface casing. Conductive casing allows for the return of fluids when drilling and cementing the surface casing, and prevents loose soil from collapsing near the surface. The casing step is one of the most costly and is extremely important for the operational safety of the well during its drilling, as well as throughout its productive life. Therefore, it is necessary a great safety control in the construction of a well, through techniques and primary and secondary barriers, to prevent accidents. Among some existing technological tools, SAEP (Application Systems for Petroleum Engineering) is a web application created by researchers from the Scientific Computing and Visualization Laboratory (LCCV), which helps professors in the field of Well Engineering, especially in this stage of casing. The present proposal aims at the integrated assessment of the stability of oil wells through the analysis of failures in safety barriers, in scenarios of the well start phase, especially to assess the integrity of the soil-cladding set, including methods such as coating by blasting and crimping, aiming at the incorporation of auxiliary tools in the process. To achieve this goal, the research foresees the insertion of a new tool in the SAEP, named "GWELL", with an emphasis on the soil-casing relationship, in which the user will be able to enter their resistance data of the worked soil and will have the result on the stability of the system. With the development of the new tool, it was possible to obtain results regarding the Resistance to Lateral Friction of the soil and the gain in load capacity during the settlement of the well casing (setup effect), which resulted in a great aid to the operational safety of the oil well project.