New Insights of Low Salinity Water Flooding in Low Permeability-Low Porosity Clay Rich Sandstone Reservoir

2018 ◽  
Author(s):  
Ali K. Alhuraishawy ◽  
Baojun Bai ◽  
Mingzhen Wei ◽  
Waleed H. Al-Bazzaz
Keyword(s):  
Water Flooding ◽  
Low Permeability ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Sandstone Reservoir ◽  
Low Porosity

The Simulation and Pilot Application of Low Salinity Water Flooding for Offshore Low Permeability Reservoir

2021 ◽  
Author(s):  
Hongfu Shi ◽  
Yingxian Liu ◽  
Yifan He ◽  
Wankun Xu
Keyword(s):  
Oil Recovery ◽  
Production Performance ◽  
Recovery Factor ◽  
Water Flooding ◽  
Low Permeability ◽  
Throat Radius ◽  
Low Permeability Reservoir ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water

Abstract The use of LSWF (Low Salinity Water Flooding) is becoming more prevalent in recent years which can both improve the recovery factor and reduce the cost compared to other EOR (enhanced oil recovery) technics. This is especially important for the offshore oilfield development at present. Moreover, good quality of injected water is more applicable to low permeability sand which is characterized as smaller pore-throat radius and is easier damaged. Therefore, LSWF technology is proposed to address the above production problem while reduce the investment of equipment upgrade. In this paper, we presented the optimization and implementation of LSWF for offshore low permeability reservoir. Firstly, we provided a critical review of LSWF included the main mechanisms, laboratory test and field effect. Secondly, we designed and conducted several laboratory core flood tests. Thirdly, a lot of synthetic models were established to simulate the effects of LSWF and to optimize the field program. Finally, the production performance of the pilot wells was discussed. After LSWF, the water injection well presents the phenomenon of "scissors" - the injection pressure drops significantly below the safety pressure while the injection volume increases. Moreover, the decline of pilot well groups decreased by 20% ~ 26% compared with non-water flooded. The estimated recovery factor increased by 12%, which is consistent with other field tests worldwide. In summary, LSWF is a feasible, neconomic and efficient method for offshore low permeability reservoir production.

Characterization of Rock and Fluid Properties for Low-Salinity Water Flooding of Highly Paraffinic Oil in a Deep Low-Permeability High-Pressure High-Temperature Offshore Carbonate Reservoir

2020 ◽  
Author(s):  
N. Singh ◽  
P. H. Gopani ◽  
H. K. Sarma ◽  
P. S. Mattey ◽  
D. S. Negi
Keyword(s):  
Experimental Studies ◽  
Carbonate Reservoir ◽  
Water Flooding ◽  
Low Permeability ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Fluid Properties ◽  
Salinity Water ◽  
Paraffinic Oil

Abstract Characterization of the rock and fluids is an essential step in screening a reservoir for Low-Salinity Water Flooding (LSWF). A detailed characterization of rock and fluid properties using appropriate methods is being presented for LSWF in a low-permeability deep carbonate reservoir together with a critical analysis of findings. The techniques used are assessed against other possible alternative methods, with inferences drawn on advantages and disadvantages of each to better interpret and apply data so gathered. In so doing, discussions on their key features as to how they can be used effectively and efficiently to screen a reservoir for LSWF are also provided. Such integration of results with other available reservoir and production data should result in a comprehensive description of the target reservoir, and it will help interpret the mechanisms and process dynamics more reliably during a low-salinity waterflood. This integration should allow us not only to gain confidence on the experimental studies but could also help optimize the key parameters responsible for formulating a more robust, reliable and representative regime for tests relevant to the LSWF prior to its eventual implementation in the field. To authors’ knowledge, such integration of experimental studies has not yet been reported in the literature, particularly for the tight carbonate reservoirs with highly paraffinic oil.

Experimental Investigation of Low-Salinity Water Flooding in a Low-Permeability Oil Reservoir

2018 ◽  
Vol 32 (3) ◽  
pp. 3108-3118 ◽  
Author(s):  
Liang Zhang ◽  
Jiaxuan Zhang ◽  
Yi Wang ◽  
Ruohan Yang ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Water Flooding ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water
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