Combined Low Salinity Water Injection and Foam Flooding in Sandstone Reservoir Rock: A New Hybrid EOR

2019 ◽  
Author(s):  
Abdolmohsen Shabib-AsL ◽  
Mohammed Abdalla Ayoub ◽  
Khaled Abdalla Elraies
Keyword(s):  
Water Injection ◽  
Reservoir Rock ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Sandstone Reservoir ◽  
Foam Flooding ◽  
Low Salinity Water Injection

Experimental Investigation of the Impact of Crude Oil and Rock on Improved Recovery by Low Salinity Water Injection

2021 ◽  
Author(s):  
Mohamed Alhammadi ◽  
Shehadeh Masalmeh Masalmeh ◽  
Budoor Al-Shehhi ◽  
Mehran Sohrabi ◽  
Amir Farzaneh
Keyword(s):  
Crude Oil ◽  
Oil Recovery ◽  
Water Injection ◽  
Core Sample ◽  
Reservoir Rock ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Reservoir Conditions ◽  
Salinity Water ◽  
Low Salinity Water Injection

Abstract This study aims to compare the roles of rock and crude oil in improving recovery by low salinity water injection (LSWI) and, particularly, to explore the significance of micro-dispersion formation in LSWI performance. Core samples and crude oil were taken from two carbonate reservoirs (A and B) in Abu Dhabi. The oil samples were selected such that one of them would form micro-dispersion when in contact with low salinity brine while the other would not. A series of coreflood experiments was performed in secondary and tertiary modes under reservoir conditions. First, a core sample from reservoir A was initialized and aged with crude oil from reservoir A and a core sample from reservoir B was initialized and aged with crude oil from reservoir B. The cores were then swapped, and the performance of low salinity injection was tested using rock from reservoir A and crude from reservoir B, and vice versa. For the first set of experiments, we found that the crude oil sample capable of forming micro-dispersion (we call this oil "positive", from reservoir A) resulted in extra oil recovery in both secondary and tertiary LSWI modes, compared to high salinity flooding. Moreover, in the secondary LSWI mode we observed significant acceleration of oil production, with higher ultimate oil recovery (12.5%) compared to tertiary mode (6.5%). To ensure repeatability, the tertiary experiment was repeated, and the results were reproduced. The core flood test performed using "negative" crude oil that did not form micro-dispersion (from reservoir B) showed no improvement in oil recovery compared to high salinity waterflooding. In the "cross-over" experiments (when cores were swapped), the positive crude oil showed a similar improvement in oil recovery and the negative crude oil showed no improvement in oil recovery even though each of them was used with a core sample from the other reservoir. These results suggest that it is the properties of crude oil rather than the rock that play the greater role in oil recovery. These results suggest that the ability of crude oil to form micro-dispersion when contacted with low salinity water is an important factor in determining whether low salinity injection will lead to extra oil recovery during both secondary and tertiary LSWI. The pH and ionic composition of the core effluent were measured for all experiments and were unaffected by the combination of core and oil used in each experiment. This work provides new experimental evidence regarding real reservoir rock and oil under reservoir conditions. The novel crossover approach in which crude oil from one reservoir was tested in another reservoir rock was helpful for understanding the relative roles of crude oil and rock in the low salinity water mechanism. Our approach suggests a simple, rapid and low-cost methodology for screening target reservoirs for LSWI.

Single-Well Chemical-Tracer Modeling of Low-Salinity-Water Injection in Carbonates

2017 ◽  
Vol 20 (01) ◽  
pp. 118-133 ◽  
Author(s):  
Emad W. Al-Shalabi ◽  
Haishan Luo ◽  
Mojdeh Delshad ◽  
Kamy Sepehrnoori
Keyword(s):  
Water Injection ◽  
Low Salinity ◽  
Chemical Tracer ◽  
Low Salinity Water ◽  
Single Well ◽  
Salinity Water ◽  
Low Salinity Water Injection

Novel Insights into Mechanisms of Oil Recovery by Low Salinity Water Injection

2015 ◽  
Author(s):  
M. Sohrabi ◽  
P. Mahzari ◽  
S. A. Farzaneh ◽  
J. R. Mills ◽  
P. Tsolis ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Water Injection ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Low Salinity Water Injection

scholarly journals Impact of Low Salinity Water Injection on CO2 Storage and Oil Recovery for Improved CO2 Utilization

2021 ◽  
Vol 229 ◽  
pp. 116127
Author(s):  
Krishna Raghav Chaturvedi ◽  
Durgesh Ravilla ◽  
Waquar Kaleem ◽  
Prashant Jadhawar ◽  
Tushar Sharma
Keyword(s):  
Oil Recovery ◽  
Co2 Storage ◽  
Water Injection ◽  
Co2 Utilization ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Low Salinity Water Injection
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