Feasibility study of in-situ generating carbon dioxide huff-n-puff process for EOR Online publication date: Tue, 30-Sep-2014
by Fulin Yang; Xiaoling Yu; Hongmei Lv; Yuanchun Tang
International Journal of Petroleum Engineering (IJPE), Vol. 1, No. 2, 2014
Abstract: In-situ gas generation huff-n-puff technology involves injection of reagents into formations that react with each other to generate gas. In the lab, we developed a new in-situ gas generation formula, NS-1, which consists of urea, catalyst and HCL. We evaluated this formula through a high pressure high temperature (HPHT) reactor and corefloods. The lab results indicate that the insitu generating gas huff-n-puff followed by waterflooding is more efficient than waterflooding followed by the in-situ generating gas huff-n-puff. The in-situ generation gas huff-n-puff is more effective in low-permeability reservoirs.
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