NW TUNU 3D Seismic Acquisition Project, The Biggest Survey on Transition Zone
The 3D seismic survey project on NothWest Tunu field is the biggest that Total ever conducted on transition zone. The survey covers land seismic, transition zone, offshore, all in one single package.
Massive Undertaking in Challenging Environment
From 2000, the production level in Tunu reached plateau and within two to three years, it began to decline. In order to maintain the production level, Total E&P Indonesie (TEPI) tries to discover extra reserves in the area by conducting a 3D seismic survey. This step is taken because the previous 2D survey is considered insufficient for its limited length and number of sensors. A 3D survey would be able to provide better digital images of the sub surface. It would also give more dense information of the gas spread at shallow reservoirs in Tunu Shallow Zone (TSZ).
However, a 3D seismic survey is a massive undertaking. “Due to its unique nature, conducting a 3D survey in shallow zone requires specific and often specially designed vehicles and equipments that are different than the ones used on offshore and onshore surveys,” says Aa of Operations & Processing - Geophysics East Kalimantan District (EKD).
To cover an area of 588 square kilometers, the project employs 1,400 workers working around the clock. It takes 18 months of acquisition and 10 months of mobilization and a total budget of $80 million to complete. These numbers showcase the measured efforts and investment that TEPI demonstrates in realizing its commitment to provide better quality energy in Indonesia.
Working Together with Locals to Conserve the Environment
Mahakam area is rich in biodiversity. In addition to its vast mangrove forests, Mahakam is home to endangered and protected animals such as river dolphin and long-nosed monkey. “We have experts standby 24 hours a day to determine whether the work we are doing will not harm these animals, especially the dolphins,” says Saleh of Sustainable Development & Societal Relations Division.
Such measure demonstrates Total’s commitment to provide better energy is as strong as conserving the environment. Compliance to national and local regulations as well as mitigation steps are taken to prevent any damage to the environment. The project also carry out a number of CSR programs, such as infrastructure development. It also engages local villagers to work in the project.
“We recruit local villagers to perform jobs such as building and dismantling the bridge,” Saleh continues. “We want to make sure that after the project is done, it leaves no waste, not even a single nail, behind.”
Such local support is proven beneficial for both sides. Local villagers learn how to conserve their environment, while the project benefits from the work they’ve done.
Compliance to health, safety and environmetn (HSE) and Golden Rule is also strictly enforced. The total amount of working hours until the survey finished is 8.35 million. More than 7.5 million of those working hours is accomplished without any significant incident and zero fatality. For its HSE remarkable achievements in NorthWest Tunu 3D seismic survey, Total E&P Indonesie received the Group Safety Award in 2015.
Today, the development of Tunu Shallow Zone is contributing 30% of the whole production of Tunu field. But with the contribution from the NorthWest TSZ, the number is expected to rise.