Pipeline stability is an important parameter of subsea pipeline service. In order to ensure the safe operation of the subsea oil and gas pipeline, so as to a chieve the safe production and sustainable development of subsea oil and gas field, risk evaluation of the subsea pipeline is required. research the technical methodology of subsea pipeline stability risk evaluation based on the worldwide standard and engineering experience. Firstly, four objects are described regarding to the risk evaluation, i.e., risk recognition, result evaluation, frequency analysis and risk matrix. Then the risk condition and evaluation methodology of subsea oil and gas pipeline stability are researched. Finally, the risk factors of subsea oil and gas pipeline stability are summarized based on the particularity of subsea pipeline. The semiquantitative evaluation method and qualitative evaluation method are used for subsea oil and gas pipeline stability risk evaluation. The results can be used for improving the accuracy of oil and gas pipeline risk assessment and promoting the related technical progress in.
