SUBSEA TREES INSTALATION IN DRAGON FIELD MARISCAL SUCRE PROJECT, PHASE I

摘要

PDVSA Offshore Division develops The Mariscal Sucre Project with the exploitation of the gas fields Dragon, Patao, Mejillones and Rio Caribe located north of the Paria Peninsula, in Sucre State, Venezuela. For the Phase I of the Project two field production stages were planned. The first one includes the Dragon field's production by an accelerated production system and after that the inclusion of the Dragon and Patao field production through a platform. This work describes the installation campaign of the first four subsea tress in Venezuela corresponding to the subsea infrastructure of the Dragon Field's Accelerated Production System. This was a milestone that marked the history of the offshore industry in the nation. These trees are horizontal type and they are set for ten thousand pounds design pressure and a configuration that allow performing well interventions without removing the tree. The subsea trees installation was held with the support of a multipurpose vessel, two working class ROVs, tree handling tools, connection equipment, etc. The produced gas of the Dragon field during the Accelerated Production System will be collect by a 16 inch and 19 kilometer length pipeline the transported to shore through a 36 inch export pipeline for distribution in the internal market. The subsea system control will be manage by a control vessel and the gas dehydration will be handle for temporary skids located in the Conditioning Plant for the Internal Market (PAGMI) in the CIGMA complex. The Dragon field subsea production system will permit the delivery of 300 MMCFD of dry gas to the internal market achieving a social commitment with the gasification of the north east side of the country substituting liquid fuels which have a high value in the export market. This substitution will facilitate the production of the electric generation plants in that region.