Deepwater Remote Operations Challenges
Today, much emphasis is given to working with real-time production data, real-time pipeline monitoring, leak detection and equipment condition monitoring. ROV/ AUV operations are used to support all sorts of deepwater seafloor construction processes, allowing operators to continuously monitor their subsea systems and intervene when necessary. Basically all equipment being installed on the seafloor has real-time communication systems, which allow operators on the surface to monitor the equipment’s performance and even control much of the equipment from the surface. Equipment that can be monitored from the surface but which cannot be manipulated remotely…
Deepwater Flow Assurance – Part 1
Flow assurance is a relatively new term in oil and gas industry. It refers to ensuring successful and economical flow of hydrocarbons from reservoir to the point of sale and is closely linked to multiphase flow technology. Flow Assurance developed because traditional approaches were inappropriate for deepwater production due to extreme distances, depths, temperatures or economic constraints. The term “Flow Assurance” was first used by Petrobras in the early 1990s (Garantia do Escoamento in Portuguese), meaning literally Guarantee of Flow, or Flow Assurance. Flow assurance is an extremely diverse subject, encompassing many specialized engineering disciplines.
Ultra-Deepwater Subsea UHP Water Jet
There is a wide array of equipment used in deepwater oil and gas E&P, many are well known, others less so and some are simply unique. Deepwater subsea ultra-high pressure water (UHP) jets belong to this last category. Chukar Waterjet is the only water jet manufacturer in the world that offers UHP water jets that operate in the ultra-deepwater subsea environment, down to depths of up to 10,000 feet (3000 meters). Chukar’s deepwater subsea water jet system has numerous applications for deepwater emergency response operations, salvage operations, and rapid de-mobilization operations. It can cut steel up to 250 mm thick and quickly blast away concrete weight coatings, corrosion and marine growth at pressures up to 55,000 psi (3800 bar).
New Subsea Center in Rio – Facing Challenges and Meeting Industry Demands
With the continuous increase of subsea equipment and services companies setting up in Rio de Janeiro, including local companies, The State Government, through its State Office for Local Development (Secretaria Estadual de Desenvolvimento Econômico), has decided to create a subsea center in order to stimulate the sector and bring investments to subsea technology suppliers eyeing the Petrobras orders. Today there are around 35 subsea companies located in Rio (8 offering equipment and 27 offering services). These companies have a workforce of almost 1,200 employees, and the idea behind the subsea center is to attract suppliers and investors for these companies.
Major Deepwater Contract with Petrobras Spotlights Subsea 7´s Enhanced Capabilities
The $1 billion contract awarded to Subsea 7 by Brazilian national oil company Petrobras, marks a new era in Subsea 7´s history. It is the first major (in terms of contract value) contract for the company after its merger with Acergy. The contract is for development of the Guara and Lula deepwater pre-salt fields in the Santos Basin, over 300km from the coast of Rio de Janeiro, in water depth of around 2,200 meters. These plays are located in Block BM-S-9 and BM-S-11 respectively. The EPIC (Engineering, Procurement, Installation and Pre-Commisioning) project scope consists of 4 decoupled riser systems featuring, four submerged buoys each of 1…
Offshore Port for Pre-salt Oil in 2012
Petrobras has decided on a novel way to transfer pre-salt oil to export and local market tankers from a maritime operations base. The projects named “Unidade Offshore de Transferência e Exportação” (UOTE) or Offshore Transfer and Export Unit (OTEU), will work as a floating port terminal. Due to the distance from land of pre-salt plays such as Tupi, which is nearly 300km from the nearest coast. The national operator chose to use an DP enabled FSO anchored in shallow waters, 80 to 90km from the coast Rio, in around 70 meters of water to receive and store production oil from shuttle tankers loaded at the production FPSOs, over the pre-salt plays. The FSO will have a capacity to store 2 million barrels of oil and will be connected to underwater pipelines.
Flexible Risers in Deepwater Production – Reliability Concerns
Flexible risers are being extensively used worldwide for deepwater O&G extraction, offering many advantages over rigid risers. However concerns still exist about the overall safety of the system, especially concerning failures leading to hydrocarbon leaks in the ocean environment.The flexible risers being used in deepwater are designed to work for a period of around 20 to 30 years, which is the expected lifetime of an O&G field. A flexible riser failure could happen due to a number of reasons, such as hostile environmental hazards and material fatigue and if the failure is catastrophic, it could lead to high economic and environmental consequences. Flexible risers comprise multiple layers, and the main layers of concerns are the tensile armor layers which exist to withstand tension loads.
Sevan Driller – New One of a Kind Deepwater Driller in Brazil
The Sevan Driller is a one of a kind deepwater and harsh environment driller which has arrived in Brazil and is preparing to start operations for Petrobras in the Campos Basin.Sevan Marine has developed a cylinder shaped floater, suitable for all offshore environments, using their own proprietary technology. Presently, Sevan Marine has four FPSO contracts, including the Goliat Sevan 1000 FPSO, and three drilling contracts with clients. One of their cylindrical FPSOs, the Sevan Piranema is already in operations in Brazil for Petrobras on an 11 year fixed contract with 6 x 1 year options + 5 x 1 year mutually agreed . The FPSO Sevan Piranema has performed with consistently high production uptime levels since its start up in October 2007.