Tertiary Oil Recovery and CO2 Sequestration by Carbonated Water Injection (CWI)

2010 ◽  
Author(s):  
Nor Idah Kechut ◽  
Masoud Riazi ◽  
Mehran Sohrabi ◽  
Mahmoud Jamiolahmady
Keyword(s):  
Oil Recovery ◽  
Co2 Sequestration ◽  
Water Injection ◽  
Tertiary Oil Recovery ◽  
Carbonated Water Injection ◽  
Carbonated Water

scholarly journals An Experimental Investigation of the Effect of Rock Wettability on the Performance of Carbonated Water Injection (CWI)

2020 ◽  
Author(s):  
Jaime Castaneda ◽  
Almohannad Alghamdi ◽  
Amir Farzaneh ◽  
Mehran Sohrabi
Keyword(s):  
Gas Phase ◽  
Oil Recovery ◽  
Water Injection ◽  
Differential Pressure ◽  
Methane Content ◽  
Residual Oil ◽  
Injection Process ◽  
Tertiary Oil Recovery ◽  
Carbonated Water Injection ◽  
Carbonated Water

Abstract Wettability is often considered one of the most relevant variables in any conventional water injection process as it dominates the microscopic distribution of fluids in the porous medium, determines the amount of residual oil, and defines the ability with which a phase can flow. On the other hand, carbonated water injection is an enhanced oil recovery technique, where basically water saturated with CO2 is injected along the reservoir with the benefits of water displacement together with the benefits of CO2 injection, without the great disadvantages of poor sweeping causing low areal efficiency. In addition, it has been proven that the transfer of CO2 from the aqueous phase to the oil phase, in one way, promotes the generation of what has been called a new gas phase, which is the main responsible for the incremental oil production, and which mainly attacks the residual oil saturation. Numerous experiments performed in the past on micro models, and plugs have shown that the injection of carbonated water plays an important role in the wettability of the rock. The injection has been demonstrated a change in the wettability to a water-wet because there is a reduction in the pH of the aqueous phase, and this is expected to modify the charges on the oil/water, and water/rock interfaces, and hence the wettability of the system. The dissolution of CO2, into the oil phase, and the destabilization of the polar components of the oil also may shift the wettability more towards water-wet, which favours a later water breakthrough, and a higher oil recovery factor. However, none of these experiments, as far as the author is informed, have been performed on whole cores, nor have these experiments used live crude oil with multi-component gases in solution, which would be closer to reality. This research seeks to close this gap by performing a new series of core floods to understand, from an engineering point of view, what effect the injection of carbonated water has on wettability in circumstances more realistic. From these analyses it was concluded that rock wettability plays an important role on the differential pressure behaviour for both waterflooding, and carbonated water injection. A mix/oil-wet rock causes a greater differential pressure response. A much higher differential pressure is obtained when carbonated water injection is started. This is assumed to be due to the formation of the new gas phase. A greater oil recovery factor is obtained in a water-wet system when both secondary waterflooding, and tertiary CWI oil recovery are summed. However, when only tertiary injection of carbonated water is analysed, a higher oil recovery is obtained in mix/oil-wet systems. The new gas phase formation is facilitated in mix/oil-wet systems. The methane content dissolved in live oil plays the main role for oil recovery, and differential pressure behaviour in a carbonated water injection process. It is inversely related to the pressure behaviour, and oil recovery. This occurs because a low methane content allows a higher formation of the new gas phase, and therefore a higher production of oil; however, the differential pressure increases at the same time. Viscosity reduction due to CO2 mass transfer has a smaller effect in oil recovery, and differential pressure than the effect caused by the formation of a new gas phase. In the experiments that were conducted, the author calculated a novel linear relationship between new gas phase saturation, and tertiary oil recovery. This relationship is almost constant irrespective of the oil, and gas compositions and the wettability of the rock. This approach would allow the calculation of the additional tertiary oil recovery potential by the injection of carbonated water, based only on the saturation behaviour of the new gas phase; therefore the new objective of this recovery method would be to maximise the formation of this new phase. Although at laboratory scale there are different methods to determine the wettability of a rock, sometimes it is not possible to perform such measurements. Therefore, the author proposes a novel method that identifies trends in wettability, or better, compares trends based on Darcy's equation. This method was applied to the experiments conducted in this research, and its results were corroborated by other approaches available in the industry. Based on the results, it is possible to infer that by using a whole core the wettability change effect associated with the injection of carbonated water is not so preponderant, on the contrary, it could be more affected by the methane content in the system. The experiments conducted prior to this research had been focused on micro-models, and 1 to 2 inch diameter core evaluations, where the analysis was restricted to pore level or small scale behaviour, systems in which the impact of pore level wettability change is much greater.

Carbonated Water Injection for Recovery of Oil and Wettability Analysis

2014 ◽  
Vol 695 ◽  
pp. 499-502 ◽  
Author(s):  
Mohamad Faizul Mat Ali ◽  
Radzuan Junin ◽  
Nor Hidayah Md Aziz ◽  
Adibah Salleh
Keyword(s):  
Oil Recovery ◽  
Oil And Gas ◽  
Promising Result ◽  
Water Injection ◽  
High Mobility ◽  
Wettability Alteration ◽  
Sweep Efficiency ◽  
Gas Flooding ◽  
Carbonated Water Injection ◽  
Carbonated Water

Malaysia oilfield especially in Malay basin has currently show sign of maturity phase which involving high water-cut and also pressure declining. In recent event, Malaysia through Petroliam Nasional Berhad (PETRONAS) will be first implemented an enhanced oil recovery (EOR) project at the Tapis oilfield and is scheduled to start operations in 2014. In this project, techniques utilizing water-alternating-gas (WAG) injection which is a type of gas flooding method in EOR are expected to improve oil recovery to the field. However, application of gas flooding in EOR process has a few flaws which including poor sweep efficiency due to high mobility ratio of oil and gas that promotes an early breakthrough. Therefore, a concept of carbonated water injection (CWI) in which utilizing CO2, has ability to dissolve in water prior to injection was applied. This study is carried out to assess the suitability of CWI to be implemented in improving oil recovery in simulated sandstone reservoir. A series of displacement test to investigate the range of recovery improvement at different CO2 concentrations was carried out with different recovery mode stages. Wettability alteration properties of CWI also become one of the focuses of the study. The outcome of this study has shown a promising result in recovered residual oil by alternating the wettability characteristic of porous media becomes more water-wet.

Comprehensive review of carbonated water injection for enhanced oil recovery

Fuel ◽  
2019 ◽  
Vol 237 ◽  
pp. 1086-1107 ◽  
Author(s):  
Cleverson Esene ◽  
Nima Rezaei ◽  
Amer Aborig ◽  
Sohrab Zendehboudi
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Injection ◽  
Comprehensive Review ◽  
Carbonated Water Injection ◽  
Carbonated Water

Enhanced Oil Recovery and CO2 Storage by Carbonated Water Injection

2009 ◽  
Author(s):  
Mehran Sohrabi ◽  
Masoud Riazi ◽  
Mahmoud Jamiolahmady ◽  
Shaun Ireland ◽  
Christopher Brown
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Co2 Storage ◽  
Water Injection ◽  
Carbonated Water Injection ◽  
Carbonated Water

Coreflooding Studies to Investigate the Potential of Carbonated Water Injection as an Injection Strategy for Improved Oil Recovery and CO2 Storage

2011 ◽  
Vol 91 (1) ◽  
pp. 101-121 ◽  
Author(s):  
Mehran Sohrabi ◽  
Nor Idah Kechut ◽  
Masoud Riazi ◽  
Mahmoud Jamiolahmady ◽  
Shaun Ireland ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Co2 Storage ◽  
Water Injection ◽  
Improved Oil Recovery ◽  
Injection Strategy ◽  
Carbonated Water Injection ◽  
Carbonated Water

scholarly journals A laboratory approach to enhance oil recovery factor in a low permeable reservoir by active carbonated water injection

2021 ◽  
Vol 7 ◽  
pp. 3149-3155
Author(s):  
Xinxiao Chen ◽  
Aminsadegh Paprouschi ◽  
Marischa Elveny ◽  
Dmitriy Podoprigora ◽  
Grigory Korobov
Keyword(s):  
Oil Recovery ◽  
Water Injection ◽  
Recovery Factor ◽  
Carbonated Water Injection ◽  
Carbonated Water ◽  
Enhance Oil Recovery
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