Investigation on Foam Self‐Generation Using In Situ Carbon Dioxide (CO2) for Enhancing Oil Recovery |
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| Authors: | Fayang Jin Peng Wei Wanfen Pu Lan Zhang Zhen Qian Guangsheng Wu |
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| Affiliation: | 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China;2. Southwest Petroleum University and Sichuan Guangya Polymer Chemical Company Limited, Chengdu, China;3. Research Institute of Engineering Technology, Northwest Oilfield Company, Sinopec, Urumchi, China |
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| Abstract: | In situ carbon dioxide (CO2) foam flooding has proved to be economically feasible in the oil field, but its self‐generation behavior in the bulk scale/porous media is far from understood. In this study, the optimum in situ CO2‐foaming agent was first screened, and then in situ foam was investigated in the bulk. In situ foam flooding was conducted to evaluate the displacement characteristics and enhanced oil recovery of this system. The results showed that the foaming agent comprising 0.5% sodium dodecyl sulfonate (SDS) + 0.5% lauramido propyl hydroxyl sultaine (LHSB) gave the best foam properties and that the in situ CO2 foam with a slow releasing rate is effective both in bulk scale and in porous media, allowing a considerable enhancement of oil recovery in sand packs with different permeabilities. |
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| Keywords: |
In situ foam CO2‐releasing property Self‐generation behavior Flowing feature Oil recovery |
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