As Japan's Arabian Oil Co., Ltd. awarded the concession agreement year (1377 AH / 1957 AD) of the neutral zone - divided - between Saudi Arabia and Kuwait (the built zone ).
The following table: shows the date of discovery of each field separately, depending on the density scale of the American Petroleum Institute, the sulphur percentage by weight ratio.
|Name||Date||Mass||Sulfur percentage by weight|
|Aramco Co.||April 1956||31||1.63 - 2.41|
|Al-Menifah||November 1957||29 - 26||3.66 - 2.97|
|Abo Sa'afa||May 1963||30||2.69|
|Al-barri||April 1964||41 - 32||2.16 - 0.09|
|Al-Zeit Ara. Co.|
|Al-Khafji||January 1960||28.5 - 28||2.85|
|Al-Hoot||October 1963||38 - 25||1.3 - 0.7|
|Janoob Al-Fawares||March 1963||24||3.18|