Volume 28: Closing Carbon Cycles – A Transformation Process Involving Technology, Economy, and Society: Part III

Study on CO2 huff and puff production mechanism and limit action distance of tight reservoir Tao Liu, Yiqiang Li ,Han Cao



CO2 huff and puff is an important means to achieve efficient development of tight reservoirs. The authors carried out CO2 huff and puff simulation experiments by using one-dimensional long core to simulate the whole process of CO2 huff and puff development in tight reservoirs. The main mechanism and the effect of well stuffing time and production pressure difference on the development effect of CO2 huff and puff in tight reservoir are expounded.The simulation results show that compared with the flow sweep caused by pressure difference, the contribution of molecular diffusion sweep to CO2huff and puff recovery is higher.

Keywords Tight reservoir,CO2 huff and puff,Carbon Storage,Molecular diffusion,

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