ABSTRACT

For offshore oil and gas production platforms in South China Sea, each year during the typhoon season from July to September many platforms shall be shut down before typhoon's arrival. However, it will result in much production loss for several days sometimes more than one week. In order to reduce the loss during typhoon season, it is badly needed to design a remote control production mode to delay the shutdown time as late as possible before Typhoon's arrival. Based on certain newly-built offshore Central Production Platform (CEP) in South China Sea, a remote control production mode is designed, in which main design principles are studied including considerations on restart, well killing, self-support days, water content of export in subsea pipeline and pipeline replacement and so on, and also special power managing system, control system and communication system are designed. Under the remote control production mode, for the newly-built CEP each year at least 4185m3 crude oil loss during the typhoon season could be avoided. It is expected to provide reference for offshore platforms in similar sea area.

INTRODUCTION

For offshore oil and gas production platforms, it was noted (Ma and Gao, 2017; Miao, Liu, Wu and Wang, 2015) that it is usually to shut down earlier enough and evacuate personnel before typhoon's arrival in order to make sure the absolute safety. However, it will result in much oil production loss for several days, especially sometimes the typhoon just bypass or turn round without arriving finally, which was proposed by Song (2022) and Lin, Jian and Nie (2022). In South China Sea, there are lots of oil and gas production platforms, and each year during the typhoon season from July to September, many platforms shall be shut down with much oil production loss. In order to reduce the loss during typhoon season, it is badly needed to design a remote control production mode to delay the shutdown time as late as possible before Typhoon's arrival.

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