Formation Damage Prevention and Adsorption Studies of Nonionic Surfactants in Sandstone Reservoirs

1990 ◽  
Author(s):  
J. Paktinat ◽  
D.D. Dunlap
Keyword(s):  
Nonionic Surfactants ◽  
Formation Damage ◽  
Adsorption Studies ◽  
Sandstone Reservoirs ◽  
Damage Prevention

Experimental Study and Pore Network Modeling of Formation Damage Induced by Fines Migration in Unconsolidated Sandstone Reservoirs

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Xiaodong Han ◽  
Liguo Zhong ◽  
Yigang Liu ◽  
Tao Fang ◽  
Cunliang Chen
Keyword(s):  
Water Injection ◽  
Three Dimensional ◽  
Experimental Results ◽  
Ion Concentration ◽  
Formation Damage ◽  
Fluid Viscosity ◽  
Pore Scale ◽  
Reservoir Properties ◽  
Reservoir Permeability ◽  
Sandstone Reservoirs

Abstract Fine migration is always considered as one of the major mechanisms that are responsible for formation damage. The unwanted reduction of reservoir permeability would result in the decline of water injection and consequent oil production, especially for the unconsolidated sandstone reservoir. For better understanding, the mechanisms of formation damage in pore-scale, a new three-dimensional pore-scale network model (PNM) is proposed and developed to simulate formation damage caused by particle detachment, migration, and capture in pore throats based on force analysis. Experiments are also conducted on the formation damage characteristics of an unconsolidated core. Both X-ray diffraction and scanning electron microscope (SEM) are applied to understand the microscopic reservoir properties. The experimental results show that the studied core has a strong flowrate sensitivity. A comparison between experimental results and PNM simulation results is conducted. The simulated results agree well with the experimental data, which approves the efficiency and accuracy of the PNM. Sensitivity analysis results show that larger particle sizes, higher flowrate, higher fluid viscosity, and lower ion concentration of the fluids would contribute to the formation damage, which could provide guidance for the development of unconsolidated sandstone reservoirs with strong sensitivity.

Dynamic Evaluation of Invasion and Backflow in Carbonate and Sandstone Reservoirs

2012 ◽  
Author(s):  
Bruno O. Silveira ◽  
Rosangela B. Z. L. Moreno
Keyword(s):  
Multiphase Flow ◽  
Drilling Fluid ◽  
Formation Damage ◽  
Dynamic Flow ◽  
Dynamic Evaluation ◽  
The Core ◽  
Advancing Front ◽  
Sandstone Reservoirs ◽  
Flow Drilling ◽  
Protocol Test

This work aims to compare the drilling fluid invasion and oil backflow in sandstone and carbonate samples in order to evaluate the influence of kind of rock in the formation damage and its interaction with the drilling tested fluid. The tests were performed in sandstone and carbonate samples with similar gas absolute permeabilities and under a protocol test in steps that included preparation, characterization, multiphase flow, drilling fluid invasion and oil backflow. During the work it was observed that carbonate samples were less water wet than sandstone samples. From the obtained results for longer samples was possible to follow the advancing front of the invading fluid with pressure observations along the core. The dynamic flow permitted to conclude that invasion in carbonate samples was faster than in sandstone. It was also observed that in carbonate samples the backflow presented a higher and faster productivity return when compared with sandstone results.

scholarly journals Effect of Pore-Throat Microstructures on Formation Damage during Miscible CO2 Flooding of Tight Sandstone Reservoirs

2020 ◽  
Vol 34 (4) ◽  
pp. 4338-4352 ◽  
Author(s):  
Qian Wang ◽  
Shenglai Yang ◽  
Paul W. J. Glover ◽  
Piroska Lorinczi ◽  
Kun Qian ◽  
...  
Keyword(s):  
Formation Damage ◽  
Co2 Flooding ◽  
Pore Throat ◽  
Tight Sandstone ◽  
Sandstone Reservoirs
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