Development Of Fuyu Fractured Sandstone Reservoirs By Water Injection

1986 ◽  
Author(s):  
Yanzheng Chen
Keyword(s):  
Water Injection ◽  
Sandstone Reservoirs ◽  
Fractured Sandstone

Improve Plugging Efficiency in Fractured Sandstone Reservoirs by Mixing Different Preformed Particles Gel Size

2017 ◽  
Author(s):  
Ali K. Alhuraishawy ◽  
Xindi Sun ◽  
Baojun Bai ◽  
Mingzhen Wei ◽  
Abdulmohsin Imqam ◽  
...  
Keyword(s):  
Sandstone Reservoirs ◽  
Fractured Sandstone

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.

LCM Plugging Effect on Producing Formations During Drilling Naturally Fractured Sandstone Reservoirs

2010 ◽  
Author(s):  
Alejandro Restrepo ◽  
Gildardo Osorio ◽  
Jorge E. Duarte ◽  
Sergio Hernando Lopera Castro ◽  
Julian Hernandez
Keyword(s):  
Naturally Fractured ◽  
Sandstone Reservoirs ◽  
Fractured Sandstone

scholarly journals Experimental investigation on reservoir damage caused by clay minerals after water injection in low permeability sandstone reservoirs

2021 ◽  
Author(s):  
Yazhou Zhou ◽  
Wenbin Yang ◽  
Daiyin Yin
Keyword(s):  
Clay Mineral ◽  
Mineral Content ◽  
Water Injection ◽  
Damage Mechanism ◽  
Water Flooding ◽  
Formation Damage ◽  
Low Permeability ◽  
Sem Images ◽  
Porosity And Permeability ◽  
Sandstone Reservoirs

AbstractWater injection is an effective method for developing low permeability sandstone reservoirs. In the process of water flooding, reservoir damage can occur due to clay mineral content changes and it will significantly affect oil production. There are few investigations on the changes in clay mineral content and the degree of reservoir damage after injecting the water into low permeability sandstone reservoirs with different permeabilities and lithologies. In this study, low permeability natural cores from different lithological strata were collected from 4 wells in the Daqing sandstone reservoir, and clay mineral components and contents were measured through X-ray diffraction. Changes in the clay mineral content were determined after water injection. The reservoir damage mechanism by clay mineral migration was determined by analyzing scanning electron microscopy (SEM) images after water injection. Meanwhile, the porosity and permeability of the cores were tested after water injection, and the degree of reservoir damage in different lithological strata was determined. The clay mineral content ranges from 6.78 to 14.14% in low permeability sandstone cores and declines by 49.73% after water flooding. Illite, chlorite and illite/smectite mostly decrease, and kaolinite decreases the least. Due to the large particle size of kaolinite, kaolinite migration will block the pore-throats and cause formation damage after water flooding. In argillaceous siltstone and siltstone, kaolinite particles blocking pore-throats are very serious, and the permeability decreases greatly by 21.87–36.89% after water injection. With increasing permeability, the permeability decreases greatly after water injection. The findings of this study can help to better understand the mechanisms of formation damage after injecting water into low permeability sandstone reservoirs.

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