French outfit Perenco believes it can sustainably increase oil and gas production in its 50-year-old Teak Samaan Poui (TSP) asset off T&T’s East coast, and already has the production holding at 10,000 barrels of oil per day.
In response to several questions from Guardian Media, the company said the installation of its floating Macarius Power Unit is a key milestone in the full modernisation plan for the TSP asset which involves the use of electrical energy to lift oil, thereby reducing the natural decline.
“Perenco is also investing in additional projects which will sustainably increase oil and gas production as part of its modernisation plan which will include upgrades to the field’s surface and sub-surface infrastructure. It is critical that we stabilise the production and then seek to increase it; it would be difficult to say exactly what the future average production would be at this time but Perenco has a long-term plan for TSP and for T&T,” the company noted.
It added, “Oil production from the Teak, Samaan and Poui (TSP) fields is approximately 10,000 bopd over the last several months and 20 mmscfd of associated natural gas. TSP is a mature offshore production asset with 50 years of operation which requires continuous investment and innovation, and productive projects to maintain its hydrocarbon production; otherwise it will decline.”
This is good news for the government and the country as the ageing asset is projected to not only continue producing but increase oil output, while at the same time free up natural gas for sale to the petrochemical sector.
Last Thursday, the company launched its Macarius Power Platform which is the first platform to be installed in the TSP field since the 1980s.
It was in 2021 that Perenco and its partners, Heritage Petroleum and NGC, launched a three-year US$200 million investment programme to modernise the TSP’s fields, replacing the existing gas-lift infrastructure and operations with electric submersible pumps and electrification of all TSP platforms.
According to the company the first phase of this initiative has already increased production by 25 per cent. The next phase of the investment plan includes the installation of the Macarius Power, conversion of gas lift systems to ESP, produced water reinjection programs and well rehabilitation.
The Macarius Power, which was previously a drilling rig, was recycled and converted at Caridoc, fully utilising the local workforce. The installation of the Macarius Power, with two gas turbines on board is expected to provide reliable and clean electrical power to the TSP platforms, reducing the overall carbon footprint of TSP operations by 30 per cent over the next three years. As this project develops, Perenco said the plan is to fully electrify the remaining platforms and move to a centralised low emission gas-fired power generation system.
According to Perenco, the use of natural gas to lift oil from the reservoir as an artificial lift method in TSP has reached its technical limit due to lift efficiency coupled with obsolete compression equipment.
It noted that compressors are costly to repair and with gas-lift there is a limit to well production and by extension the recoverable reserves of TSP.
“Electrical Submersible Pump (ESP) screening show the greatest impact for the maintenance of production and subsequent increase. On the other hand, we will not need to compress and re-cycle 70 mmscfd of natural gas which would have been used in the previously used gas-lift process,” Perenco told the Business Guardian.
The French outfit said the increase in oil production comes from the installation of these electrical submersible pumps (ESPs) to replace the gas-lift technology of the 1970s needed to bring the oil to surface. With the installation of each well ESP there will be a reduction in the volume of gas for artificial lift, so this gas can be transferred to the national network operated by NGC.
It said TSP is over 50 years in production and requires continuous investment to maintain production and upgrade its top-side structures to extend the productive life of the asset.
“This Power Generation project consists of fully electrifying the fields which will significantly reduce the carbon footprint of TSP by replacing old inefficient diesel engines (inherited from the past) with modern gas turbines to generate electricity and by shutting-in inefficient gas-lift compressors. TSP gas reservoirs are particularly mature with reservoir depletion and water influx making all predictions very challenging. We have so far freed up to approximately 7 mmscfd of gas volumes. However, this number can range from 5 mmscfd up to 20 mmscfd based on subsurface projection,” Perenco told the Business Guardian.
Perenco reminded that the installation of the Macarius Power is a key milestone in the full modernisation plan for the TSP asset to use electrical energy to lift oil thereby reducing the natural decline.
Perenco said it is also investing in additional projects which will sustainably increase oil and gas production as part of its modernisation plan which will include upgrades to the field’s surface and sub-surface infrastructure.
Perenco noted that it is critical that it stabilise the production and then seek to increase it and added that it would be difficult to say exactly what the future average production would be at this time but it has a long-term plan for TSP and for T&T.