TEX is a leader in the application of new technology in Statoil and in the oil and gas industry. Our technological expertise in areas such as petroleum technology, subsea and marine technology, facilities and operations technology and HSE enhances Statoil's operational performance. Technology development and implementation are used to promote and achieve corporate targets for production growth, increased regularity, reserve growth, reduced costs and improved drilling efficiency. Technology excellence also supports innovators and entrepreneurs in connection with technology development and commercialisation activities.
Selected technology advances and important milestones in 2011:
Subsea gas compression - a technological quantum leap
In August 2011, Statoil decided to implement Åsgard subsea gas compression in 2015 - the first project of this kind in the world. With this innovative technology in place, the recovery rate and lifetime of several gas fields can be considerably increased, taking us one step closer to realising our goal of a total subsea factory. Processing on the seabed - and gas compression in particular - is an important technological advance in relation to developing fields in deep waters in vulnerable areas. Statoil is also running a wet gas compression project on Gullfaks and participating in Ormen Lange in close cooperation with Shell.
Hot-tap gives flexibility
Statoil is responsible for the development of new technology that makes it possible to tie in to a pipe on the seabed while it is in operation, without divers and without preparing the pipe for it. Operations can also take place at greater depths than before, which potentially could save Statoil and partners billions of NOK. Hot-tapping pipes in full operation at depths of up to 2,000 metres (via remote operation from a ship) could revolutionise the utilisation of the subsea network on the Norwegian continental shelf. The technology is developed by Statoil and can be significant to the development of marginal discoveries.
Fast track: moving from tailor-made to ready-made
Our expertise from 25 years of technology development subsea has given us the field-proven technology, expertise and infrastructure required to enable the fast-track concept. Together with external suppliers, we have developed a subsea catalogue for developments on the NCS at depths of up to 500 metres. It defines both standardised subsea equipment and configurability - from "bare bones" to "high functionality" solutions. The fast-track concept increases the speed and reduces the cost of developing smaller fields.
New model for calculating NOx emissions
A new model for calculating NOx emissions from gas turbines has been developed by Statoil to ensure a more predictive NOx emission monitoring system. As of year-end 2011, the new NOx monitoring system, which has been developed in-house, has been implemented for 69 of 78 gas turbines in DPN. Twenty of the 23 offshore installations are now using the new tool, and the remaining installations are planned to be included during early 2012. Implementation of this technology has been highly cost efficient compared with solutions from suppliers.
Optimal gas turbine water wash
Introducing new guidelines for optimised water wash of gas turbines is expected to increase the availability and efficiency of Statoil's gas turbine fleet. Statoil has a total of 140 gas turbines in operation. Fouling in the compressor section of the gas turbines is the main contributor to performance deterioration. It is removed by water wash.
Improved technology on Snøhvit brings significant energy savings
Improved technology at the Snøhvit LNG plant has reduced power consumption by 10% (15MW). The energy savings mainly come from improvements of the cooling efficiency of the internals in the subcooler and a new robustified condenser with vapour belts. Technology selection and qualification have been carried out by experts from TEX and R&D.
Large cost reductions on Valemon and Gudrun
New requirements have recently been adopted for where to apply passive fire protection. These new requirements have resulted in large cost reductions compared with previous practice, and they have also reduced the risk of major accidents. Passive fire protection applied to process piping and separators has been the source for external corrosion underneath the insulation due to sea water ingress. The corrosion can result in hydrocarbon leaks and an increased risk of major accidents.
Improved oil recovery
Very high recovery factors have been achieved by water injection on the NCS, but waste volumes of oil are still left in the ground. These are either bypassed by the injected water or trapped in the rock flooded by water. Three different technologies designed to improve recovery by water injection have been successfully field-tested in 2011. Low-saline water has been injected in the Heidrun field, showing a significant reduction in the amount of trapped oil in the water-flooded regions, and two different chemical systems to improve the distribution of injected water have been field tested on Snorre and Gullfaks.