ABSTRACT

The trends within the offshore industry towards deeper waters required that the associated technology is developed in parallel. Only by such a development can viable and cost effective solutions be provided to exploit deeper and/or marginal fields. A key area of technology is the control and monitoring of subsea located production equipment.

Petrobras, Brazil's national oil company and a pioneer within deep water field developments, will establish a new depth record when it bring onstream its Albacora and Marlim fields. The fields are located in the Campos basin off the country's South-Eastern coast and lie in water depths of 660 to 6560 ft. these developments will include floating processing facilities, templates w/chokes, satellite wells and both hard and flexible flowlines.

To complete the overall development of the two fields in the short time span available will require extensive modifications of existing designs to meet the requirements of operating depth, functionality and cost.

This paper presents a new control and monitoring system which may be used for the above mentioned fields which will be due for prototype testing in 1990. The system is tailor-made for a subsea satellite, but can be extended to serve for more complex systems like templates etc. the design takes maximum advantage of off the shelf components, and utilizes a simplified installation technique as compared to current systems.

INTRODUCTION

The trend within the offshore industry is to move the exploitation of hydrocarbon resources towards deeper waters and hence unknown territories, and this more than ever before emphasizes the need to pursue critical components with long development lead times at an early stage.

Only by such an approach can the components be made available with the required quality and act as cost effective elements in the whole field development.

A key area is the control and monitoring technology of subsea located production equipment such as X-mas trees and manifold systems.

Petrobras, Brazil's national oil company and pioneer within deep water oil field developments, will establish an unmatched approach when the Albacora and Marlim fields are brought on stream. These fields are located in the Campos basin, in water depths ranging between 200 to 2,000 m (660 to 6560 ft), and will together produce through some 350 subsea completions.

To be able to develop the two fields in the planned period of roughly a decade will require extensive modifications of existing hardware to meet the requirements of operating depth, functionality and cost.

Petrobras has recognized this and launched an extensive programme called PRCAP for the development of such key hardware components. As a part of this programme BrasNor is currently undertaking to develop a new control and monitoring system. The purpose of this paper is to present the background, current status and future plans for the MUXCOM project.

BRASILIAN OFFSHORE EXPERIENCE

The operating premises for Petrobras as laid down by the government has put a very strong cost consciousness into the organization.

This has created a situation where capital investments are in the region of 40 to 60% of USA, UK or Norway.

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