scholarly journals Effect of Electrokinetics and Thermodynamic Equilibrium on Low-Salinity Water Flooding for Enhanced Oil Recovery in Sandstone Reservoirs

ACS Omega ◽  
2021 ◽  
Vol 6 (5) ◽  
pp. 3727-3735
Author(s):  
Yogarajah Elakneswaran ◽  
Amir Ubaidah ◽  
Miku Takeya ◽  
Mai Shimokawara ◽  
Hirofumi Okano
Keyword(s):  
Enhanced Oil Recovery ◽  
Thermodynamic Equilibrium ◽  
Oil Recovery ◽  
Water Flooding ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Sandstone Reservoirs

scholarly journals A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery

RSC Advances ◽  
2020 ◽  
Vol 10 (69) ◽  
pp. 42570-42583
Author(s):  
Rohit Kumar Saw ◽  
Ajay Mandal
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Wettability Alteration ◽  
Rock Surface ◽  
Calcite Dissolution ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Mechanistic Investigation ◽  
Salinity Water

The combined effects of dilution and ion tuning of seawater for enhanced oil recovery from carbonate reservoirs. Dominating mechanisms are calcite dissolution and the interplay of potential determining ions that lead to wettability alteration of rock surface.

scholarly journals Development of a Microfluidic Method to Study Enhanced Oil Recovery by Low Salinity Water Flooding

ACS Omega ◽  
2020 ◽  
Vol 5 (28) ◽  
pp. 17521-17530 ◽  
Author(s):  
Marzieh Saadat ◽  
Peichun A. Tsai ◽  
Tsai-Hsing Ho ◽  
Gisle Øye ◽  
Marcin Dudek
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water

scholarly journals Predicting the electrokinetic properties of the crude oil/brine interface for enhanced oil recovery in low salinity water flooding

Fuel ◽  
2019 ◽  
Vol 235 ◽  
pp. 822-831 ◽  
Author(s):  
Miku Takeya ◽  
Mai Shimokawara ◽  
Yogarajah Elakneswaran ◽  
Toyoharu Nawa ◽  
Satoru Takahashi
Keyword(s):  
Crude Oil ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Electrokinetic Properties ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water

Successful in the Lab, Not as Effective in the Field? Uncertainties in the Field Observations of Low Salinity Water Flooding in Sandstone and Carbonate Reservoirs-A Critical Analysis

2021 ◽  
Author(s):  
Navpreet Singh ◽  
Hemanta Kumar Sarma
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Experimental Studies ◽  
Carbonate Reservoirs ◽  
Water Flooding ◽  
Water Salinity ◽  
Field Scale ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water

Abstract Low salinity waterflooding has been an area of great interest for researchers for almost over three decades for its perceived "simplicity," cost-effectiveness, and the potential benefits it offers over the other enhanced oil recovery (EOR) techniques. There have been numerous laboratory studies to study the effect of injection water salinity on oil recovery, but there are only a few cases reported worldwide where low salinity water flooding (LSW) has been implemented on a field scale. In this paper, we have summarized the results of our analyses for some of those successful field cases for both sandstone and carbonate reservoirs. Most field cases of LSW worldwide are in sandstone reservoirs. Although there have been a lot of experimental studies on the effect of water salinity on recovery in carbonate reservoirs, only a few cases of field-scale implementation have been reported for the LSW in carbonate reservoirs. The incremental improvement expected from the LSW depends on various factors like the brine composition (injection and formation water), oil composition, pressure, temperature, and rock mineralogy. Therefore, all these factors should be considered, together with some specially designed fit-for-purpose experimental studies need to be performed before implementing the LSW on a field scale. The evidence of the positive effect of LSW at the field scale has mostly been observed from near well-bore well tests and inter-well tests. However, there are a few cases such Powder River Basin in the USA and Bastrykskoye field in Russia, where the operators had unintentionally injected less saline water in the past and were pleasantly surprised when the analyses of the historical data seemed to attribute the enhanced oil recovery due to the lower salinity of the injected water. We have critically analyzed all the major field cases of LSW. Our paper highlights some of the key factors that worked well in the field, which showed a positive impact of LSW and a comparative assessment of the incremental recovery realized from the reservoir visa-a-vis the expectations generated from the laboratory-based experimental studies. It is envisaged that such a comparison could be more meaningful and reliable. Also, it identifies the likely uncertainties (and their sources) associated during the field implementation of LSW.

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