Microscale Evaluation of Tight Oil Mobility: Insights from Pore Network Simulation

Energies

Suping Ma¹  Jiyong Li¹  Jiaqiang Zhang¹  Yanqing Xia¹  Haoyuan Jiang¹  Yongchao Wang¹  Junli Qiu¹  Lingling Li²  Hongmei Shao²  Bo Gao²  Zihui Feng² 

[1] Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;Research Institute of Petroleum Exploration and Development, Daqing Oilfield of CNPC, Daqing 163000, China;

关键词: shale oil;    mobility;    pore network model;    relative permeability;   

DOI  :  10.3390/en14154580

来源: DOAJ

【 摘 要 】

Pore network modeling based on digital rock is employed to evaluate the mobility of shale oil in Qingshankou Formation, Songliao Basin, China. Computerized tomography technology is adopted in this work to reconstruct the digital rock of shale core. The pore network model is generated based on the computerized tomography data. We simulate the dynamics of fluid flow in a pore network model to evaluate the mobility of fluid in shale formation. The results show that the relative permeability of oil phase increases slowly in the initial stage of the displacement process, which is mainly caused by the poor continuity of the oil phase. In the later stages, with the increase in the oil phase continuity, the range of relative permeability increases. With the increase of organic matter content, the permeability of the water phase remains unchanged at low water saturation, but gradually increases at high water saturation. At the same time, it can be seen that, with the increase in organic matter content, the isosmotic point of the oil–water phase permeability shifts to the left, indicating that the wettability to water phase gradually weakens.

【 授权许可】

Unknown