Enhanced oil recovery (EOR) methods are adopted when the reservoir is not auto-sufficient energetically or even after secondary oil recovery and the reservoir is not producing satisfactorily. This article aims to perform a literature review of EOR methods, starting from the applied techniques worldwide in onshore fields and proposing implementation in Brazilian onshore scenarios. This initial work studied polymer flooding combustion in situ and cyclic steam in onshore fields. The most promising studied method was combustion in situ due to its higher recovery factor. However, further studies are necessary to understand better more cases of EOR methods applied in onshore scenarios.
Currently, the method of post-combustion in industries that uses the adsorption technique to capture and separate carbon dioxide from the flue gas is widely studied due to energy efficiency, ease of handling, lower cost, and environmental risk compared to other separation techniques. Regarding the adsorbents used in adsorption, zeolites are one of the most promising because they are one of the most efficient materials with high adsorption capacity due to their unique properties. However, despite the promising performance, the adsorbents need studies that enable a lower cost, more efficient, and selective control to better understand and validate utilization as a material for flue gas CO2 capture.
The increase in clean energy’s demand, and the new policies in mitigating gas emissions with greenhouse gas have reactivated the production and market of natural gas (NG). In the fields of Brazilian pre-salt, it is ordinary for natural gas to be produced with a high CO2 content. Therefore, the CO2 content present in natural gas shall be separated for marketing purposes. This study aimed to review the literature on the methods of CO2 removal of NG currents, in which the membrane permeation method was evidenced. We concluded that membrane permeation is an efficient method for CO2 separation in isolated processes and in hybrid processes, having a lower energy consumption and enabling a higher removal rate at a relatively lower cost.
Fines migration is an important mechanism that describes the effects of low salinity waterflooding (LSW) in sandstone reservoirs. The fine detachment has a significant role in controlling fine migration. The interactions between the fine and the rock surfaces are described by Derjaguin-Landau-Verwey-Overbeek (DVLO) theory. These interactions are governed by several physicochemical parameters such as zeta potential, ion composition, pH and temperature. In this paper, sensitivity analyzes are performed to evaluate the parameters contributions on the total surface energy. Using available data, four correlations were developed to assist in the sensitivity analyzes. The results show that the pH and the ionic concentration of 𝑁𝑎𝐶𝑙 have a large impact on the repulsive forces, whereas temperature plays a minor role in the total energy.
This article aims to carry out a literature review of the different experimental methods for determining MMP, presenting a comparative analysis between slimtube, rising-bubble (RBA) and coreflood. Each experimental method was evaluated and understood. A critical analysis was performed from design, operation and application to the parameters in each method. Because it is visual, the RBA allows more precision and repeatability than the slim tube and coreflood, because it has fewer differences between their experimental designs. In addition, when dealing with the experiment time factor, the RBA is also superior to the other methods, taking hours to determine the MMP.
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