Most of Saudi Arabias currently proven Natural Gas reserves consist of associated gas, including the offshore Safaniya and Zuluf field. A huge (13-Tcf) natural gas field, called Dorra, is located offshore near the Khafji Oil field in the Saudi-Kuwaiti Neutral Zone and may be developed by Japans AOC. Dorra development is controversial, however, because part of it is also claimed by Iran (which calls the field Arash). The maritime border between Kuwait and Iran remain undemarcated, but Saudi Arabia reached an agreement with Kuwait in July 2000 to share Dorra equally. Currently, Iran is resisting any moves by Kuwait and Saudi Arabia to develop the field on their own. Iran and Kuwait have been discussing their offshore boundary since 2000.