Experimental study of wettability alteration and spontaneous imbibition in Chinese shale oil reservoirs using anionic and nonionic surfactants

2019 ◽  
Vol 175 ◽  
pp. 624-633 ◽  
Author(s):  
Junrong Liu ◽  
James J. Sheng ◽  
Xiukun Wang ◽  
Hongkui Ge ◽  
Erdong Yao
Keyword(s):  
Experimental Study ◽  
Nonionic Surfactants ◽  
Spontaneous Imbibition ◽  
Oil Reservoirs ◽  
Wettability Alteration ◽  
Shale Oil ◽  
Shale Oil Reservoirs

scholarly journals Study on mechanism of spontaneous imbibition and pressurized imbibition in shale oil reservoirs

2020 ◽  
Author(s):  
Lanlan Yao ◽  
Zhengming Yang ◽  
Haibo Li ◽  
Bo Cai ◽  
Chunming He ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Spontaneous Imbibition ◽  
Oil Reservoirs ◽  
Recovery Ratio ◽  
Shale Oil ◽  
Fracture System ◽  
Matrix System ◽  
Jianghan Basin ◽  
Shale Oil Reservoirs ◽  
Shale Permeability

AbstractImbibition is one of the important methods of oil recovery in shale oil reservoirs. At present, more in-depth studies have been carried out on the fracture system and matrix system, and there are few studies on the effect of energy enhancement on imbibition in shale oil reservoirs. Therefore, based on the study of pressurized imbibition and spontaneous imbibition of shale oil reservoirs in Qianjiang Sag, Jianghan Basin, nuclear magnetic resonance technology was used to quantitatively characterize the production degree of shale and pore recovery contribution under different imbibition modes, and analyze the imbibition mechanism of shale oil reservoirs under the condition of energy enhancement. The experimental results showed that with the increase in shale permeability, the recovery ratio of pressurized imbibition also increased. The rate of pressurized imbibition was higher than spontaneous imbibition, and pressurized imbibition can increase the recovery ratio of fractured shale. Spontaneous imbibition can improve the ultimate recovery ratio of matrix shale. Pressurized imbibition can increase the recovery contribution of macroporous and mesoporous.

Experimental Study on Changes in Pore Throat Systems Owing to Liquid CO2 Cooling in Shale Oil Reservoirs

2021 ◽  
Author(s):  
Mengqing He ◽  
Tiantai Li ◽  
Xing Huang ◽  
Liangbin Dou ◽  
Zhenjiang Zhou ◽  
...  
Keyword(s):  
Experimental Study ◽  
Oil Reservoirs ◽  
Shale Oil ◽  
Pore Throat ◽  
Liquid Co2 ◽  
Shale Oil Reservoirs

Experimental study on the feasibility of supercritical CO2-gel fracturing for stimulating shale oil reservoirs

2020 ◽  
Vol 238 ◽  
pp. 107276
Author(s):  
Sihai Li ◽  
Shicheng Zhang ◽  
Yushi Zou ◽  
Xi Zhang ◽  
Xinfang Ma ◽  
...  
Keyword(s):  
Experimental Study ◽  
Supercritical Co2 ◽  
Oil Reservoirs ◽  
Shale Oil ◽  
Shale Oil Reservoirs
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