The Berri field extends off Saudi Arabia's east coast, about 50 kilometres north of the export terminal at Ras Tanura. The field is a giant anticline measuring 40 kilometres north to south, and 20 kilometres east to west. There are seven producing reservoirs in the field. Most production is light, sour oil from the Jurassic Hanifa and Hadriya formations, which is blended with oil from the Shaybah and Abqaiq fields and marketed as Arab Extra Light crude. Berri also produces from the Jurassic Upper Fadhili and Arab A, B, C and D reservoirs. Saudi Aramco plans a major expansion project at Berri, which will see the development of more than 200,000 b/d oil by the mid 2020s to offset natural decline in the field.