Description: Environmental monitoring after abandonment remains necessary according to the production sharing agreement and national and international legal texts. Environmental monitoring contributes to environmental protection. The closure of hydrocarbon facilities, known as 'abandonment and decommissioning', often has consequences.This manuscript is a decision-making aid for future decision-makers in anticipation of crises, to improve our knowledge in this area, identify impacts and risks, and determine how to mitigate them in the event of abandonment. It is accompanied by the development of a network of specialists capable of contributing their expertise and utilising tools in the event of a major crisis due to abandonment.
