Investor Presentaiton

EXISTING INDONESIAN ASSETS Bass holds a 55% operating interest in the producing Tangai-Sukananti KSO in the oil rich South Sumatra Basin ☐ ☐ Experienced on-ground Indonesian team manages the operations Consistent production at the long-life KSO; License expiry in 2025 Production capacity currently ~500 barrels of oil per day (JV share) after a series of repairs in the field Monthly daily production in June 2021 averaged 438 bopd (JV share) June 2021 production totaled 13,140 bbls and 7,227 bbls net to Bass 2021/22 drilling program targeting production uplift to +1,000 bopd July 2021 104'00 104 10 Raja Talang Gula 320 수 Candi Bentang Gunung Kemala -330 Tapus Pandan Petanang 104 20 Kemang Prabumulih City Prabumulih Barat Lembak Tundan INDONESIA Limau Niru Talang Jimar Limau Barat Limau Tengala Limau Timur P Kom Gajah Besar Limau Timur Q-22 Limau Timur 0-51 10430 SUMATRA South Sumatra Basin O 9GA Tangai-Sukananti KSO 200 ° kilometres Tanjung Tiga Barat + Ogan Karangan Tanjung Mining Barat Tanjung Tiga Timur Sukanant Harimau Tanjung Miring Timur Sukamerindu Tangai-Sukananti KSO Beringin E Tangai Sukanati block location map Production (kbbl) 14 12 10 864 2 0 Beringia E Beringin C Bass Strait Oil Permit Oilfield Condensate field. Gas field Gas pipeline Oil pipeline Condensate pipeline Fault Fault Oil and gas well Oil well Gas and condensate Oil and gas show Oil show + Dry well Sumavs O * Tangai-Sukananti Rolling 12 month Production (55% basis) Jul-20 Aug-20 Sep-20 Oct-20 Nov-20 Dec-20 Jan-21 Feb-21 Mar-21 Apr-21 May-21 Jun-21

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