Statistical Calculation Of Marine Hydro-meteorological Parameters For Jacket Platform Design

Oil is important resource for social and economic development in every country. Marginal oil field exploitation is a system engineering including drilling operation, oil extraction, and platform construction. It plays an important role to propose ocean environmental conditions criteria for structural safety and investment reduction. As the complexity randomness and diversity of the marine environment, the probability of variety environmental conditions can not be calculated by the traditional design standards for the marine environment. Traditional design standards often overestimated the design parameters, resulting in unnecessary waste of investment. At present, how to reduce the costs of marginal oil field development and construction is the core issues. Based on observed and hindcast data, Bivariate Poisson maximum entropy distribution is adopted to calculate the probability of extreme wind velocity and wave height. Different statistical models are compared. Calculation results are given as decision-making references for departments of government, planning, and design. The main content of this study is as follows:(1) The long-term statistical analysis of marginal distribution is used in this paper to predict the values of extreme wind and wave surge by both the Annual Maximum Method and the Peak Over Threshold Method;(2) Calculate and compare method of single factor extreme value distribution;(3) Proposed bivariate Poisson maximum entropy distribution;(4) Bivariate Poisson maximum entropy distribution is used to estimate the return values of wind velocity and wave height hindcasted in offshore area of bohai. Different criteria of design parameters are compared for marginal oil field exploitation.