Countries and companies likewise ought to take ever more bolder actions due to the aggravation of climate change impacts. Taking this into consideration, the international community and its actors have been seeking commitments to renew climate actions and fulfill the transition to a sustainable society. The need to take actions to mitigate and to adapt to climate change impacts, and hence promoting justice, encompasses all human activities. As such, energy production takes a special place in the green transition. It massively contributes to human-driven climate change through high GHG emissions. Nevertheless, it still lacks international binding rules, comprehensive governance and innovative policies. Indeed, before full-fledge transition, international climate bodies recognize the urgency of short-term solutions. Thus, practices that enhance energy efficiency become much needed climate actions. Unititzation presents itself as a widespread practice in national jurisdictions. However, it is not properly implemented in many countries and does not encompass international oil fields. Considering the commitments undertaken, the costumes and rules in regard to climate, one must reach the conclusion that unitization has become mandatory practice in oil extraction, production and transportation in order to reduce waste and improve energy efficiency. States’ duties do not end in cooperation, common procedures and rules must accompany the development of joint oil and gas reserves.Countries and companies likewise ought to take ever more bolder actions due to the aggravation of climate change impacts. Taking this into consideration, the international community and its actors have been seeking commitments to renew climate actions and fulfill the transition to a sustainable society. The need to take actions to mitigate and to adapt to climate change impacts, and hence promoting justice, encompasses all human activities. As such, energy production takes a special place in the green transition. It massively contributes to human-driven climate change through high GHG emissions. Nevertheless, it still lacks international binding rules, comprehensive governance and innovative policies. Indeed, before full-fledge transition, international climate bodies recognize the urgency of short-term solutions. Thus, practices that enhance energy efficiency become much needed climate actions. Unititzation presents itself as a widespread practice in national jurisdictions. However, it is not properly implemented in many countries and does not encompass international oil fields. Considering the commitments undertaken, the costumes and rules in regard to climate, one must reach the conclusion that unitization has become mandatory practice in oil extraction, production and transportation in order to reduce waste and improve energy efficiency. States’ duties do not end in cooperation, common procedures and rules must accompany the development of joint oil and gas reserves.A transição para uma sociedade sustentável exige novos compromissos e ações mais efetivas por parte da comunidade internacional e de seus atores, países e empresas. O agravamento dos impactos das mudanças climáticas reforça a necessidade de ações de mitigação e adaptação para em todas atividades humanas para a promoção da justiça. Neste contexto, a produção energética ocupa uma posição central, pois trata-se de um grande contribuinte para a mudança climática por meio da emissão de gases de efeito estufa. Sem embargo, há uma ausência de regras internacionais compulsórias, uma lacuna de governança global climática e de políticas inovadoras. Antes, porém, de uma transição completa para uma economia verde, faz-se necessária a adoção de medidas de curto prazo. Práticas que promovam a eficiência energética, tal qual a unitização, apresentam-se como essa solução. Por mais que esteja prevista em diversas jurisdições, não é devidamente implementada e não abrange propriamente as reservas internacionais de petróleo e gás. Considerando os compromissos climáticos internacionais, os costumes e práticas, bem como o desenvolvimento do tema ambiental, há de concluir-se pela obrigatoriedade da adoção da unitização. Dentro do ciclo do petróleo e do gás, a prática reduz a perda energética e o lixo no processo de extração e transporte do material. A obrigação dos Estados de fato não termina no dever de cooperação. Procedimentos e regras comuns devem acompanhar a exploração conjunta de reservas transfronteiriças
