In 1961, the world’s first subsea completion was installed on a well in the Gulf of Mexico. Over the last 52 years the use of subsea trees has spread to the majority of offshore producing regions, with a total 4,851 trees installed by end-2012. Since 1990, the world has seen a growth in the number of deep water (>500m) tree installations. The use of subsea trees and developments appears set to revolutionise the offshore oil and gas industry, placing more focus on subsea fabricators.
Into the Deep End
The Graph of the Month shows the number of subsea trees installed per year from 1990 to 2016 (potential/under construction post-2013) and a breakdown of shallow versus deepwater installations. During 2011, the subsea tree demand hit a low point in the wake of 2008’s economic troubles. Since then however, the sector has seen a boom in tree installations, with expected future installations for 2014 up by 77% on 2013 and 2016 projected installations up a staggering 174% on 2013, with a total of 916 potential trees. Furthermore, the near future will demand more subsea trees with deep water, high pressure technologies, as shown by the increase in the share of trees in deep water of around 40 percentage points since 2000.
The region utilising the most subsea trees is NW Europe, with 1,638 active. The region’s ageing fields, containing smaller, marginal pay zones, mean that subsea trees and tie-backs provide a solution for continuing productivity in the North Sea. In Latin America, subsea trees are allowing for the development of wells in the ultra-deep water pre-salt plays of Brazil. The region has 919 active trees and accounts, along with West Africa, for many of the potential installations over 2013-2016. Subsea is not for everyone however: in the shallow Middle East, less than 40 trees are active, with wellhead platforms preferred.
Given the extra subsea tree demand, how will the market cope? As previously highlighted, demand will have a bias, with many being required in the North Sea and Brazilian pre-salt areas. GE Oil & Gas have reportedly stepped up their UK manufacturing capacity for trees by circa 40%. However, with only 4 major subsea tree fabricators worldwide, supply may bottleneck in the coming years.
A boom in subsea tree demand will also affect the installation vessel markets. Traditionally, MODUs and other drilling vessels were used for tree installation. However, with the hike in rig costs (45% since end-2010 for jack-ups), installation contractors have been increasingly turning to installation by relatively cheaper MSVs. A total of 68 MSV vessels are on order, which despite accounting for 25% of the current fleet, may grow. There is also an additional 10% of the Dive and ROV Support fleet on order, a number which is likely to increase over the next 4 years.
So, Petrobras, Statoil and the supermajors are employing subsea technology increasingly frequently. Demand is growing for trees and associated infrastructure, along with installation units, promising a positive period for subsea fabricators.