Half of Kuwait’s oil production comes from Burgan, the second largest oilfield in the world, a senior oil official said in published remarks.

That would indicate the field was pumping just over a million barrels per day (bpd), as Kuwait pumped around 2.3 million bpd in May, according to a Reuters survey.

The field has capacity to pump 1.6 million bpd, according to US government data.

Known as Greater Burgan, the oil field encompasses the Burgan, Magwa and Ahmadi fields. The field holds around 70 billion barrels, or around 70 percent of Kuwait’s 101.5 billion barrels of reserves, according to U.S. data.

Sami Rushaid, chief executive of state-run oil and gas exploration and production arm, Kuwait Oil Company, told al-Seyassah newspaper Burgan was one of 17 fields the Opec member was producing from. Kuwait has 110 oil reservoirs, he said.

In April, a Kuwaiti official said the oilfield was bigger than past estimates had indicated.

The world’s fourth-largest oil exporter’s capacity stands at 3.1 million bpd. It aims to reach 3.5 million bpd in 2015 before expanding to 4 million bpd in 2020.

(Source: Reuters)