Patent ID: 11931708
Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 3:
4. A method for controlling carbon dioxide fluidity by using the device of claim 1, including:
(i) adding a surfactant and nanoparticles of nano-silica into the sample preparation tank to prepare a mixed solution of surfactant and nanoparticles;
(ii) injecting carbon dioxide into the high-pressure stirring tank by means of a booster pump, and heating the carbon dioxide;
(iii) pumping the mixed solution prepared in step (i) by the plunger pump and atomizing the mixed solution by the atomizing spray probe, and then spraying the mixed solution into the high-pressure stirring tank for stirring; and
(iv) injecting a microemulsion of supercritical carbon dioxide and nano-silica prepared in step (iii) into a subsequent oilfield well group.