Pore-scale imaging and analysis of low salinity waterflooding in a heterogeneous carbonate rock at reservoir conditions

Scientific Reports, Год журнала: 2021, Номер 11(1)

Опубликована: Июль 23, 2021

Abstract X-ray micro-tomography combined with a high-pressure high-temperature flow apparatus and advanced image analysis techniques were used to study fluid distribution, wetting states oil recovery during low salinity waterflooding (LSW) in complex carbonate rock at subsurface conditions. The sample, aged crude oil, was flooded brine series of increasing rates, eventually recovering 85% the initially place resolved porosity. pore throat occupancy revealed change distribution space for different injection rates. Low invaded large pores, consistent displacement an oil-wet rock. However, as more injected, redistribution fluids observed; smaller pores throats by displaced moved into larger elements. Furthermore, situ contact angles curvatures oil–brine interfaces measured characterize wettability changes within calculate capillary pressure. Contact angles, mean pressures all showed shift from weakly towards mixed-wet state volumes injected sample. Overall, this establishes methodology quantify scale which appears be dominant mechanism LSW.

Язык: Английский

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Ionic Interactions at the Crude Oil–Brine–Rock Interfaces Using Different Surface Complexation Models and DLVO Theory: Application to Carbonate Wettability

ACS Omega, Год журнала: 2022, Номер 7(8), С. 7199 - 7212

Опубликована: Фев. 15, 2022

The impact of ionic association with the carbonate surface and its influence toward wettability remains unclear is an important topic interest in current literature. In this work, a triple layer model (TLM) approach was used to capture electrokinetic interactions at both calcite–brine oil–brine interfaces. developed TLM assembled against measured ζ-potential values from literature, successfully capturing trends closely matching magnitudes. compared diffused (DLM) presented previous works, DLM showing better match for seawater brine solutions. predicted complexation models (SCMs) were calculate total interaction energy (or potential) based on Derjaguin, Landau, Verwey, Overbeek (DLVO) theory. It observed that low Mg2+ high SO42– concentrations modified composition (MCB) made interface more negative. However, interface, negative but slightly shifted At crude oil–brine–rock (COBR) interfaces, MCB generate greater repulsive energy, which could trigger alteration water wetness. absolute sum interfaces be correlated potential 0.25 nm separating distance. Thus, increase ζ-potentials would alteration. Therefore, these SCMs can applied design capable triggering alter

Язык: Английский

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Enhanced oil recovery through synergy of the interfacial mechanisms by low salinity water alternating carbon dioxide injection

Process Safety and Environmental Protection, Год журнала: 2022, Номер 188, С. 462 - 472

Опубликована: Окт. 4, 2022

Язык: Английский

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Strategy for Optimum Chemical Enhanced Oil Recovery Field Operation

Journal of Resource Recovery, Год журнала: 2023, Номер 1(1), С. 0 - 0

Опубликована: Янв. 1, 2023

The main objective of this review paper is to present practical considerations for field implementation chemical enhanced oil recovery (CEOR) methods which are complex and require a tailored study given reservoir. Researchers have examined several CEOR screening standards. To the best our knowledge, however, there no thorough provide detailed workflow transitioning laboratory studies into practices project execution operations. We analyze highlight more than thirty publications published between 2018 2021 in order give readers latest information about different methods. also summary both conventional cutting-edge technologies. This provides readers, researcher, suppliers with better understanding novel hybrid techniques that currently being developed. tools ranking selecting methods, such as chemicals, guidelines, workflow, injection parameters, formulations, economic parameters. Our survey's findings indicate scaling up from scale deployment has many challenges barriers. These barriers include; cost, history match forecast simulations, surveillance, facilities, method considerations, standardization performance metrics, onset projects, manufacturing, environmental impacts Finally, based on these findings, we proposed new projects. In summary, strategy developing, implementing, assessing

Язык: Английский

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Role of sulfate ion on wettability alteration and oil mobilization in chalk reservoirs during modified salinity waterflooding

Geoenergy Science and Engineering, Год журнала: 2023, Номер 227, С. 211922 - 211922

Опубликована: Май 17, 2023

It has often been reported that an increase in sulfate a positive effect on altering wettability and mobilizing oil during modified salinity water flooding carbonate reservoirs. However, this understanding is mostly based experimental studies using outcrop rock material. Therefore, study aims to reassess the role of recovery performance injection oil-saturated porous media chalk reservoirs real reservoir We compare results with samples evaluate effects material alteration mobilization. conduct dynamic contact angle measurements coreflooding experiments conditions. Our findings contradict previous observations, as we discovered decreasing concentration displacing fluid causes shift chalk's more water-wet condition, which significantly improves also establish samples, typically used laboratory experiments, cannot be reliable analogues for same geological age. Finally, use direct pore scale simulations demonstrate impact observed simulation align our findings, indicating primary mechanism fluid-fluid interactions were ignored, flow was mainly controlled by medium's state.

Язык: Английский

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