Determinação da quantidade de água convertida e consumo de gás na formação de hidratos em sistemas multifásicos

Abstract

The oil industry plays a fundamental role in Brazil’s economy, with oil being one of the main sources of energy and raw materials in the national energy matrix. In this context, it is crucial to understand the importance of oil and its various forms of exploration and well communications, such as via riser, umbilical, gas-lift, etc. Moreover, another point of interest for this sector is the study of natural gas hydrate formation. These compounds pose risks such as pipeline blockages and equipment damage, resulting in substantial financial losses and operational hazards. Assessing the amount of hydrates formed allows for the prediction of operational risks in a specific region under given conditions, providing valuable information for flow assurance. The present work aims to develop a new methodology to calculate water conversion and the amount of gas consumed, using the CPA (Cubic-Plus-Association) equation of state and the van der Waals and Platteeuw (1959) model. This approach seeks to enhance the accuracy of calculations and optimize the analytical processes related to gas hydrates in the oil and gas industry. It also stands out for its independence from third-party software, employing CPA to calculate the compressibility factor and using the statistical theory of Cady’s model (1983), which applies the van der Waals and Platteeuw (1959) model for the calculation of the hydration number. This contributes to a more precise and direct analysis of hydrate formation processes. The results obtained for the compressibility factor and the hydration number were compared with literature data and the Multiflash™ software, showing good agreement. These results indicate that the developed methodology and tools improve accuracy and facilitate calculations in hydrate formation, offering a robust and independent alternative for the analysis of hydrate formation processes in the industry.