Elaboração de modelos para sequência operacional da estrutura de poços de petróleo offshore com base em dados históricos

Abstract

In offshore oil exploration, the construction of a well requires long and complex operations, which results in excessive costs, related to the rental of drilling rigs. It is essential to analyze the sequence of operations required for its construction, particularly concerning its structure, given its importance throughout the well's lifecycle, to seek a reduction in errors and execution time. A promising analytical approach is to use historical data in the planning of new offshore operations, aiming to bring more predictability to the assessment and design process of new wells. To do so, operational sequence models of the well structure were developed based on actual drilling schedules to establish parameters for duration and anomalies for production, injection, and special wells. The analyses were conducted using a database of drilling schedules conducted by an oil company. The schedules were imported into spreadsheets, where they were grouped according to well type, and specific well structure activities were separated from others to establish the operational sequence and its parameters. The developed models can be used for both the design of new wells and the evaluation of previously executed schedules, aiming to reduce errors, downtime of equipment and personnel, and, consequently, cost reduction.