Otimização do itinerario de sondas de intervenção / Workover rig itinerary otimization
AUTOR(ES)
Ronaldo Oliveira de Paiva
DATA DE PUBLICAÇÃO
1997
RESUMO
The costs of workover and the loss of revenue in wells waiting workover rigs are very high. This work proposes methods to prioritize these wells in order to minimize the total cost. To determine the workover sequence it is necessary to compare the rig expense with the wells losses. To calculate the wells losses, it is necessary to analyze the monetary influence of the well shutdown in the production curves. In this work, this analysis is made by using a numerical reservo ir simulator. Simplified calculation procedures are also presented. The priority of the wells is based on the reduction of the total cost, which consists of the rig costs plus the revenue losses due to workover waiting. There are many algorithms able to determine the ideal rig path. In this work, simple and intuitive algorithms, are implemented and impared. The Simulated Annealing algorithm is recommended. This algorithm was implemented to optimize workover rig routes in a brazilian production region. Otimization of the workover sequence carried out in that region in 1996 identified a potential economy of 15% in the production losses, equivalent to 4.000 cubic meter/year ofoil (25.000 bbl/year)
ASSUNTO(S)
operational research pesquisa operacional digital computer simulation engenharia de petroleo petroleum engineering simulação (computadores digitais)
