Production strategy for oceanic methane hydrate extraction and power generation with Carbon Capture and Storage (CCS)

Methane hydrate (MH) is one well-known promising energy resources, which has been proved to exist widely around the world and in large amount. Though there are several proposals for efficient utilization system of MH, challenges still remains in the production enhancement. In this study, a new strategic production model is proposed for oceanic MH extraction and offshore power generation with Carbon Capture and Storage (CCS). The batch type design is facilitated with vertical well system and warm-up process, which is executed before and during the continuous gas extraction from MH reservoir. The system includes a methane gas extraction system, power generation system and CO2/H2O injection system. The re-injection of hot water/CO2 sustains the sensitive heat for the dissociation extraction process in a typical strategic production lifecycle. Numerical simulation shows that this design is possible to enhance the long-term gas production. Thermal balance and sensitive heat supply are proved to be of special importance for production rate. The analysis of power generation and CCS system show a general efficiency of 40% for this design. The selection of amine use, the effect of injection conditions and the feasibility of the proposed extraction/generation system are also discussed into detail in this study. (C) 2017 Elsevier Ltd. All rights reserved.