Surabaya, East Java (VOA) —
PT Pertamina (Persero) has begun implementing Carbon Capture Utilization and Storage (CCUS) technology at the Pertamina EP Sukowati Field in Bojonegoro, East Java by carrying out the first injection of carbon dioxide (CO2) to increase oil and natural gas production.
A total of 500 tonnes of CO2 was injected into the Sukowati 18 well through the application of an advanced oil recovery method or Enhanced Oil Recovery (EOR).
Director of Development and Production of Pertamina Hulu Energi, Awang Lazuardi, said that the Sukowati 18 well was chosen as the injection location because it was considered the most ideal and close to the source of the CO2 raw material to be injected.
“In terms of the reservoir (underground area containing petroleum. ed.) here it is quite good, in terms of pressure it is also quite good, in terms of location, geography, the field here is close to Jambaran Tiung Biru as a source of CO2. “So this is the most ideal field for us to do that,” said Awang.
CCUS is a technology to capture carbon dioxide (CO2) emissions from industrial processes, such as power plants and oil and gas drilling so that they are not released into the atmosphere. The captured CO2 is then stored below the surface or used for other purposes.
Sukowati Field in Bojonegoro, where the first CO2 injection was carried out to increase production and reduce emissions. (Photo: Petrus Riski/VOA)
EOR is a way to extract remaining oil from fields that have been producing for a long time. Several EOR techniques that are commonly used, according to Pertamina, are hot steam injection (steam flooding), chemical injection (chemical flooding), and gas injection (gas flooding).
Previously, CO2 injection was also successfully carried out in the Jatibarang field. Awang said that the trials in the next seven days are expected to provide good results, as well as confirm and validate the specific EOR technology, along with evaluation data for full field development projects.
Apart from being expected to increase production, CO2 injection is also part of Indonesia’s commitment to reduce greenhouse gas emissions. Indonesia targets to achieve zero carbon emissions by 2060 or sooner.
Awang said that what Pertamina is currently doing is building capabilities by implementing EOR as well as CCUS, so that it gets two benefits, namely increasing oil and gas production and reducing emissions.
“Later, when we have full field development, we will inject CO2 continuously. “We will get environmental results from oil, but on the one hand, because we take CO2, we inject it, so at the same time we will reduce emissions,” explained Awang.
Secretary General of the National Energy Council (DEN), Djoko Siswanto, said that the technology of injecting CO2 into oil drilling wells that are still operating and those that are old has proven successful in increasing oil production in a number of developed countries. Apart from being a real effort to reduce emissions, Djoko targets this step to increase oil production by between 100 and 300 percent.
“This will prove that CO2 injection technology can increase oil production, and the target is to increase it by 100 to 300 percent. Secondly, the world is currently talking about reducing emissions, then this is also a concrete form. Pertamina carries out a CCUS program, carbon capture, then utilized and injected. “This has two goals at the same time,” said Djoko.
Apart from Jatibarang and Sukowati, Pertamina is developing the same program in seven different locations throughout Indonesia.
PT. Pertamina (Persero) carried out the first CO2 injection at the Pertamina EP Sukowati field, Bojonegoro, East Java. (Photo: VOA/Petrus Riski)
Pertamina’s Senior Vice President for Research and Technology Innovation, Oki Muraza, said that apart from the CCUS method through the application of EOR, Pertamina also has other methods to increase national oil production, such as chemical EOR, vibration and thermal.
“After this, we won’t just stop at the pilot (pilot project -ed), yes. Later the plan will be for implementation. So, there are several countries that have successfully implemented CO2 EOR. CO2 EOR is one strategy to increase national production, there is chemical EOR, there is CO2 EOR, something we have also tried is vibration. “Plus there is already commercial thermal in Duri.”
Duri Field is in the Rokan Working Area, Riau Province. Pertamina Hulu Rokan manages the Rokan Block after the contract for the United States oil and gas company, Chevron Corporation, ends in August 2021.
Meanwhile, Asia Technology Lead analyst, Institute for Energy Economics and Financial Analysis (IEEFA), Putra Adhiguna said that implementing EOR using CCUS technology has actually been used by a number of countries in the world for a long time in the last 30 years. This method, said Putra, has been proven to be able to increase oil and natural gas production, although the percentage increase depends on the condition of each drilling well.
PT. Pertamina (Persero) carried out the first CO2 injection at the Pertamina EP Sukowati field, Bojonegoro, East Java.
“Let’s put it into context at the global level, in reality there are statistics showing that around 500,000 barrels of oil are produced every day using CO2 -EOR, so it’s just ordinary stuff. “So, indeed it can be used and it can function, but its application and performance in certain fields in Indonesia still have to be tested,” he explained.
Putra added, when carbon capture technology was first discovered, its development was still dominated by the oil and gas sector, namely 70 percent. Meanwhile, almost no other industrial sectors use it due to the high cost, which is around 100 dollars per ton of CO2. The use of this technology in the oil and gas sector, said Putra, has become normal because oil or natural gas produced by oil and gas companies always has CO2 contaminants which must be separated before being sold to consumers.
Meanwhile, regarding the effectiveness of the CCUS-EOR method as an effort to reduce greenhouse gas emissions, Putra believes that this method has a limited impact because this technology has only been used in the oil and gas sector. Apart from that, the source of carbon capture carried out by oil and gas companies is still from the same company, not from PLTUs or other industries which also contribute a lot to greenhouse gas emissions.
“In fact, in the future the world will no longer talk about EOR as the use of captured CO2. So, actually, if we look at the trend in the use of carbon capture, in the past carbon capture was developed for the oil and gas sector. So, around 70 percent of CCUS applications are always in the oil and gas sector, because they are developing it from oil and gas for oil and gas. “In fact, in the future, the application that the world will pursue is for storage, not for EOR,” he said. (pr/ft/ah)