Petroleum Science >2018,??Issue 2:??421-431 DOI: https://doi.org/10.1007/s12182-018-0223-4
Integrated risk management: a Petrobras application in offshore well construction safety to minimize critical emergency disconnections Open?Access
文章信息
作者：Claudio Benevenuto de Campos Lima, Pedro Esteves Aranha, Jose Francisco Tebaldi de Castro, Gilson Brito Alves Lima, Augusto Borella Hougaz and Felipe de Souza Terra
作者单位：
Petrobras, Rio de Janeiro, RJ, Brazil; Department of Production Engineering, Federal Fluminense University, Niterói, RJ, Brazil,Petrobras, Rio de Janeiro, RJ, Brazil,Petrobras, Rio de Janeiro, RJ, Brazil; Department of Production Engineering, Federal Fluminense University, Niterói, RJ, Brazil,Department of Production Engineering, Federal Fluminense University, Niterói, RJ, Brazil,Petrobras, Rio de Janeiro, RJ, Brazil and Petrobras, Rio de Janeiro, RJ, Brazil
投稿时间：2017-04-06
引用方式：de Campos Lima, C.B., Aranha, P.E., de Castro, J.F.T. et al. Pet. Sci. (2018) 15: 421. https://doi.org/10.1007/s12182-018-0223-4
文章摘要
In order to avoid mistakes and to save a great deal of time in analysis, an innovative methodology was developed that can analyze the well operations and rig characteristics involved to define the best emergency disconnect sequence (EDS) available. A solution was developed based on the characteristics of the rigs and blowout preventers (BOPs), and six variables were considered that directly affect the choice of EDS. All possible combinations of 64 scenarios were analyzed, and the priority of choice of the EDS was defined empirically. This paper presents an approach to EDS risk management and examples of exposure time (time without riser safety margin and shear capability) for the same well, which can be lowered from 13% to 0.1%. The impact of this reduction is related to the ability of the BOP to cut some of the heavy casings, in addition to improved availability of EDS modes. This implementation opened up many possibilities for the performance of risk exposure analysis, enabling comparison of several BOP configurations of contracted rigs and selection of the best options. This innovative approach allowed a better management of the rig schedules, prioritizing safety aspects and making it possible to allocate the fleet in a systematic way.
关键词
-
Well safety, Safety barriers, Emergency disconnect sequence (EDS), Well control, Kick, Well design