Enhanced oil recovery using low tension gas flooding in high salinity, low permeability carbonate reservoirs
- Das, Alolika
DOIAbstract
Chemical enhanced oil recovery (EOR) in carbonate reservoirs is a technically and economically challenging process. Low-Tension Gas flooding is developed as an attractive alternative to conventional EOR methods for application in low permeability and high salinity formations, especially in the presence of divalent cations. The process of Low-Tension Gas (LTG) flooding has been investigated on the laboratory scale as a tertiary and secondary recovery process for a low permeability (<10 mD) Middle Eastern carbonate reservoir with high formation salinity (~200,000 ppm TDS; 19,000 ppm of Ca ²⁺ and Mg ²⁺). LTG flooding design is based on two main mechanisms: mobilizing residual oil by generating ultra-low interfacial tension (IFT) conditions in ...
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