Abstract
This chapter discusses huff-n-puff gas injection in shale and tight gas condensate oil reservoirs. Huff-n-puff gas injection is compared with gas flooding in terms of their potential to enhance liquid recovery and remove liquid blockage. Huff-n-puff gas injection is also compared with huff-n-puff solvent injection in core scale and field scale. The solvents are methanol and isopropanol. The capacity of surfactants to remove liquid blockage is also studied. Factors that affect huff-n-puff gas injection performance are discussed. Mechanisms of huff-n-puff injection are discussed. Optimization of huff-n-puff injection is proposed.
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