A Novel Workflow of Greenhouse Gas Capture and Utilization in Well HealthIssue

摘要

Liquid load issue is commonly found in the gas condensate reservoir. In this regard we consider a novelworkflow consisting: (i) CO2 capture from fossil fueled power plants, (ii) inject the captured CO2 intothe well and (iii) investigate the effects of CO2 injection in well health. This communication reports, theissue identification and verification, as well as the effects of high purity CO2 on surface tension, minimummiscible pressure (MMP) and well productivity. ScCO2 will be obtained from a chemical-looping combustion (CLC) integrated power plant. The novelCLC method includes the application of a solid oxygen (O2) carrier to supply O2, instead of air, to carry outthe fuel combustion, thereby almost pure CO2 can be delivered without any energy penalty for separation.The captured CO2 needs to be brought in ScCO2 condition before injection. A mathematical workflow modelwas developed to identify and verify liquid loading issue. In addition, surface tension, and density weremeasured at high pressure and temperature to analyse the influence of supercritical CO2 in recovery andliquid loading. As indicated above, this study comprises with three major aspects (i) captured/compressed of CO2 froma power plant and (ii) use of ScCO2 in gas condensate reservoirs and (iii) impact of pure CO2 in the wellhealth. In CO2 capture, a thermodynamic parametric models analysis has been conducted using natural gasas fuel, and nickel oxide as a solid oxygen carrier. The influence of temperature in fuel and O2 ratios are examined by the Gibbs free energy method todetermine the combustion product composition. It reveals that CO2 is purified up to 99.5% in the fuelcombustion cycle which is nickel (Ni) based O2 carrier. The result is agreed with the experimental studies. The workflow model identified and varied liquid loading in an active well. Surface tension (ST) betweenArabian condensate and ScCO2 was measured and found that ST continued to decrease with increasingpressure. Dynamic miscibility value was determined at high pressure and temperature.