1. Experimental Study on Factors Affecting the Performance of Foamy Oil Recovery
- Author
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Li Tong, Dongxing Du, Yang Jiru, Ninghong Jia, Rong Wang, and Weifeng Lv
- Subjects
CT scan ,Control and Optimization ,020209 energy ,Residual oil ,Energy Engineering and Power Technology ,Computed tomography ,02 engineering and technology ,lcsh:Technology ,Foamy oil ,chemistry.chemical_compound ,020401 chemical engineering ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,0204 chemical engineering ,Electrical and Electronic Engineering ,Engineering (miscellaneous) ,Pressure drop ,Petroleum engineering ,medicine.diagnostic_test ,influential factors ,Renewable Energy, Sustainability and the Environment ,lcsh:T ,Dry gas ,Permeability (earth sciences) ,chemistry ,Oil production ,Environmental science ,heavy oil recovery ,Saturation (chemistry) ,foamy oil ,Energy (miscellaneous) - Abstract
The flow characteristics of dissolved gas driven processes in some heavy oil reservoirs, such as low gas&ndash, oil ratio and higher oil recovery rate than expected, are quite different from conventional oil production processes. Foamy oil is considered one of the main reasons behind such a production phenomenon. In this paper, the factors affecting the performance of foamy oil recovery were experimentally investigated in a sandpack medium with the assistance of computed tomography (CT) technology to help further the understanding of the mechanism. Five different experiments were applied and the results showed that (1) the linear pressure drop production model had a similar oil recovery to that of the step-down mode, (2) increasing the depletion rate could be more favorable to the oil recovery rate, (3) under a constant gas&ndash, oil ratio, raising the temperature had little impact on oil recovery, but showed obvious impact on the production curve, and (4) with higher permeability, there were more residual oil at the end of the displacement process. Lastly, a dry gas huff and puff experiment was conducted and the decreased oil saturation was observed in the inlet section, while no obvious effect was remarked in the outlet region of the medium.
- Published
- 2019
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