EOR in Tight Oil Reservoirs through Wettability Alteration

2013 ◽  
Author(s):  
Prateek Kathel ◽  
Kishore K. Mohanty
Keyword(s):  
Oil Reservoirs ◽  
Wettability Alteration ◽  
Tight Oil ◽  
Tight Oil Reservoirs

Analytical modelling of wettability alteration-induced micro-fractures during hydraulic fracturing in tight oil reservoirs

Fuel ◽  
2019 ◽  
Vol 249 ◽  
pp. 434-440 ◽  
Author(s):  
Yunhu Lu ◽  
Lingping Zeng ◽  
Quan Xie ◽  
Yan Jin ◽  
Md Mofazzal Hossain ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Analytical Modelling ◽  
Oil Reservoirs ◽  
Wettability Alteration ◽  
Tight Oil ◽  
Tight Oil Reservoirs

Facile Fabrication of Nanoemulsions through the Efficient Catanionic Surfactants for Spontaneous Imbibition in Tight Oil Reservoirs: Experimental and Numerical Simulation

2021 ◽  
Author(s):  
Bing Wei ◽  
Runxue Mao ◽  
Haoran Tang ◽  
Lele Wang ◽  
Dianlin Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Oil Recovery ◽  
Surfactant Solution ◽  
Spontaneous Imbibition ◽  
Oil Reservoirs ◽  
Wettability Alteration ◽  
Tight Oil ◽  
Catanionic Surfactants ◽  
The Matrix ◽  
Tight Oil Reservoirs

Abstract Spontaneous imbibition (SI) is an essential method for accelerating mass exchange between fracture and matrix in tight oil reservoirs. However, conventional systems such as brine and surfactant solution have limited imbibition effects, so there is still abundant remaining oil in the matrix. Nanoemulsion holds the most promising potential in improving tight oil recovery owing to the favorable surface activity and nanoscale droplets, but it still lacks economic and facile methods to fabricate nanoemulsions. Therefore, in this paper, we prepared a kind of O/W nanoemulsion of catanionic surfactants with a low dosage of surfactant and energy consumption, which was then used to assess spontaneous imbibition performance in Changqing outcrop cores by experimental and numerical simulation. We have fully considered the possible imbibition mechanisms of nanoemulsion including wettability alteration, IFT reduction, solubilization and emulsification, etc., and successfully applied to the nanoemulsion imbibition model. The model and experimental data were found to be in good agreement. The results showed that the imbibition rate and oil recovery factor of the nanoemulsion in the first 100 hours are lower than that of brine. In the late stage, we observed a longer equilibrium time and a faster and higher oil imbibition process in nanoemulsion with ultralow IFT. Finally, we confirmed that solubilization and emulsification is one of the domiant mechanisms for nanoemulsion imbibition by comparing with the modelling without considering solubilization and emulsification.

scholarly journals Stimulation and Sequestration Mechanism of CO2 Waterless Fracturing for Continental Tight Oil Reservoirs

ACS Omega ◽  
2021 ◽  
Author(s):  
Jiaping Tao ◽  
Siwei Meng ◽  
Xu Jin ◽  
Jianguo Xu ◽  
Qinghai Yang ◽  
...  
Keyword(s):  
Oil Reservoirs ◽  
Tight Oil ◽  
Tight Oil Reservoirs ◽  
Waterless Fracturing

Numerical modeling of fluid flow in tight oil reservoirs considering complex fracturing networks and Pre-Darcy flow

2021 ◽  
Vol 207 ◽  
pp. 109050
Author(s):  
Linkai Li ◽  
Xiao Guo ◽  
Ming Zhou ◽  
Zhangxin Chen ◽  
Lin Zhao ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Fluid Flow ◽  
Oil Reservoirs ◽  
Darcy Flow ◽  
Tight Oil ◽  
Tight Oil Reservoirs
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