Development of supercritical carbon dioxide experimental system

Supercritical carbon dioxide (SC-CO2) has many excellent properties, such as high rock-breaking efficiency, strong dissolved performance and good displacement efficiency. It is a high-efficiency fluid to exploit coal-bed methane, shale gas, heavy oil, low permeability reservoirs and other unconventional oil and gas reservoirs. Using SC-CO2jet to break formation rock assisted the drill bit can get several times the penetration rate of conventional drilling and effectively enhance the oil recovery while achieving an initiative reduction of greenhouse gas by storing the CO2underground in the proper unconventional reservoirs. In this study, the procedure of SC-CO2experimental system is designed based on the SC-CO2fluid properties and the actual operation conditions. The system can effectively simulate the actual drilling and completion process with SC-CO2. The research lays basis for the development of SC-CO2drilling technology. © 2015 ejge.