Environmental data

[A]

Oil and gas industry guidelines (IPIECA/API/OGP) indicate that a number of sources of uncertainty can contribute to the overall uncertainty of a corporate emissions inventory. CO2 equivalent is a term used to express the total emissions of the major greenhouse gases, including CO2, methane, nitrous oxide and hydrofluorocarbons.

[B]

Nigeria includes SPDC onshore operations (1.4 million tonnes flared in 2012) and SNEPCo offshore operations (0.1 million tonnes flared in 2012).

[C]

Flaring from the Pearl GTL plant in Qatar and the Majnoon field in Iraq amounted to 0.2 and 0.1 million tonnes of hydrocarbon respectively in 2012.

[D]

2012 data reported on a consistent basis with previous years in accordance with IPIECA/API/OGP guidance 2005.

[E]

The data includes mining and upgrading operations. It does not include in situ production. We have updated our figures following recalculation of the data.

[F]

Data is indexed to 2002, based on Solomon Associates Energy Intensity Index 2006 methodology.

[G]

We have updated our 2011 and 2010 figures following review of the data.

[H]

All spill volumes and numbers are for spills over 100 kilograms.

[I]

As of the end of March 2013, there were three spills under investigation in Nigeria that may result in adjustments to the 2012 data.

[J]

All sabotage- and theft-related spills have occurred in Nigeria except in 2007 (0.7 thousand tonnes outside Nigeria) and 2006 (0.6 thousand tonnes outside Nigeria).

[K]

Nigeria includes SPDC onshore operations and SNEPCo offshore operations. A single spill at the Bonga field offshore Nigeria amounted to 4.8 thousand tonnes in 2011.

[L]

We have updated our 2011 figure following review of the data. The numbers of operational spills reported for 2004 and 2005 contain a small number of hurricane spills.

[M]

Nigeria includes SPDC onshore operations (36 operational spills in 2012) and SNEPCo offshore operations (0 operational spills in 2012).

[N]

In 2012 we recycled, reused or sold over 300 thousand tonnes of material that would otherwise have been disposed of as waste.

n/c

Not calculated.