Integrated simulation system of CO2 gas injection application for enhanced oil recovery in the oil field

Abstract

CO2 gas injection is one of the recommended enhanced oil recovery (EOR) methods by injecting CO2 through reservoir pores after the residual saturation is reached, since CO2 dissolves easily in oil phase as confirmed by many other researchers in pertaining field studies. An integrated system is urgently required for assessing CO2-EOR study, covering multi-disciplinary aspects as follows: geology, geophysics, reservoir, production, process and economic. Hence, those systems must be reliable in suggesting final decision for feasibility of CO2-EOR operation program, applicable either for pilot scale or for full scale. This paper is proposing an integrated system evaluation, which has the following features: (1) estimate fraction of dissolved CO2, (2) estimate viscosity reduction, (3) estimate future oil productivity index resulted, (4) forecast incremental oil production, (5) estimate surface facilities equipment design, (6) evaluate economical aspects and (7) generate final decision for feasibility of CO2-EOR operation program. Finally, as the main objective of this program, those systems will present a picture of essential reason why we need to promote or reject CO2-EOR plan program, and also some recommendations will be presented in case the CO2-EOR plan does not perform as expected.

Modelling of Internal Transformations of Gas Phase in Porous Media

“…Dynamics of dissolution or diffusion of gas released as a result of the reaction also differed depending on the use of formation water or process water in the prepared solution. These results are in good agreement with the results of the authors Kristanto et al (2020), Rodosta et al (2017). Under the same thermodynamic conditions, rapid CO 2 release significantly changes the distribution of water and oil saturation in the displacement zone, as well as the volume flow rate in the boundary zone.…”

Efficient immobilization of acids into activated carbon for high durability and continuous desulfurization of diesel fuel

“…Disulfides, mercaptans, thiophenes (TH), and their derivatives, such as pentathiophene (BT) and dibenzothiophene (DBT), are typical organic sulfur compounds (OSCs) found in fuels. The US Environmental Protection Agency and the European Union both recently announced stringent restrictions that set the maximum permitted sulfur concentration at 10 and 15 ppm, respectively 6–13 . Adsorptive desulfurization (ADS) is one of the alternatives to hydrodesulfurization (HDS) that has a high cost of production because it requires harsh working conditions.…”

“…The US Environmental Protection Agency and the European Union both recently announced stringent restrictions that set the maximum permitted sulfur concentration at 10 and 15 ppm, respectively. [6][7][8][9][10][11][12][13] Adsorptive desulfurization (ADS) is one of the alternatives to hydrodesulfurization (HDS) that has a high cost of production because it requires harsh working conditions. Due to its low energy and material requirements, the ADS is currently regarded as a potential desulfurization process.…”

Key geological factors controlling oil displacement efficiency of CO2 injection in low-permeability reservoirs

“…In addition, polymer-stabilized emulsions formed during the displacement, resulted in severe challenges in oilfield surface production (Wang et al., 2019). Oil displacement with CO 2 injection is characterized by low pressure and strong suction capacity in low-permeability reservoir, which is easily to keep balance between injectors and producers with no reservoir damage (Dedy et al., 2020). It can reduce negative effect of capillary force and enhance oil displacement efficiency using miscible or semi miscible CO 2 flooding (Choubineh et al., 2016; Stephenson et al., 1993; Zhao and Liao, 2012).…”