Fundamental aspects, mechanisms and emerging possibilities of CO2 miscible flooding in enhanced oil recovery: A review

Kumar, Narendra; Sampaio, Misako U.; Ojha, Keka; Hoteit, Hussein; Mandal, Ajay

doi:10.1016/j.fuel.2022.125633

Cited by 111 publications

(47 citation statements)

References 178 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surfactant is injected in a short time and then disturbed, which maximizes the synergistic effect of the surfactant and water injection disturbance. The added surfactant can significantly reduce the capillary resistance, and at the same time, the disturbance further expands the sweep range, so that the surfactant and CO 2 can spread to small pores and throats …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of CO₂ Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Yao

Zhao

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

After conventional development, there is still a significant amount of residual oil as a result of the poor porosity and permeability characteristics of shale reservoirs. Although CO 2 flooding is one of the most reasonable recovery techniques, it is affected by a serious sweep efficiency issue. In this paper, six CO 2 huff-n-puff cooperative combination methods were established with the aid of three-dimensional physical simulation equipment, including CO 2 huff-n-puff (HNP), water-disturbance-assisted CO 2 huff-n-puff (WD-HNP), surfactant-and water-disturbance-assisted CO 2 huff-n-puff (SWD-HNP), pumping-production-assisted CO 2 huff-n-puff (PP-HNP), water-disturbance-assisted CO 2 huff-n-puff after pumping production (WDP-HNP), and surfactant-and water-disturbance-assisted CO 2 huff-n-puff after pumping production (SWDP-HNP). The displacement characteristics, utilization law, and development effect were investigated. CO 2 huff-n-puff requires more gas injection quickly, and low permeability and pressure difference can easily cause irregular gas channeling, showing the arc linear flooding pattern. Water disturbance can significantly delay the rapid breakthrough, so that the displacement edge shows the radial flooding pattern. The effect of pumping production on the displacement is not obvious, and the leading edge still shows an oval-shaped flooding pattern. Surfactant assistance improves the gas injection ability, eventually demonstrating a plane steady flooding pattern. In comparison to HNP, the average enhancement degree of water injection disturbance, pumping production, and surfactant assistance to the utilization extent is 6.61, 1.82, and 8.93% respectively. Meanwhile, SWDP-HNP had the highest oil recovery (33.35%) among all modes. By comparison of effective productivity, it revealed that about 12% of the lifting range is helped by surfactant assistance, followed by a water injection disturbance lifting amplitude of 5.5%, while pumping production only led to a 3% improvement. With the combination of all development effect evaluation indicators, SWD-HNP is a reasonable displacement method to improve shale reservoir recovery in this study.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The added surfactant can significantly reduce the capillary resistance, and at the same time, the disturbance further expands the sweep range, so that the surfactant and CO 2 can spread to small pores and throats. 39 3.3.2. Oil−Gas Replacement Rate (OGR).…”

Section: Development Effect Evaluation Of Different Huffn-puff Modes ...mentioning

confidence: 99%

Effect of CO₂ Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Yao

Zhao

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…When considering CO 2 flooding, the most concern is whether CO 2 will be miscible with the oil in the reservoir under the current reservoir conditions. Theoretically at MMP the maximum possible oil recovery ( ~70% in field scenario) can be achieved leading to huge economic benefit [48]. MMP is considered to be a key factor in evaluating whether a reservoir fulfills miscible flooding [49].…”

Section: Minimum Miscible Pressure Screeningmentioning

confidence: 99%

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Wang¹,

Wu²,

Ge³

et al. 2023

Sci. Tech. Energ. Transition

View full text Add to dashboard Cite

Carbon Capture, Utilization, and Storage (CCUS) technology has emerged as the bottom-line technology for achieving carbon neutrality goals in China. The development of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR) not only increases revenue for high-investment CCUS projects but also enables permanent CO2 storage in the oil reservoir. However, the basin is used as the research object to evaluate the CO2 storage potential of the oil reservoir. The evaluation results are inaccurate and unable to support the implementation of later CCUS projects. Here, more accurate oil reservoir data is employed as the evaluation object. It is the first time at the national level to screen oil reservoirs to distinguish between CO2 miscible and immiscible, and evaluate the potential of CO2-EOR and CO2 storage in the reservoir. The research results show a total of 2570 suitable oil reservoirs in 4386 candidate oil reservoirs nationwide. About 1.26 billion tons of additional crude oil can be produced by CO2-EOR technology. This includes approximately 580 million tons of additional oil from CO2 miscible flooding and 680 million tons from CO2 immiscible flooding. The study further refines the CO2 geological utilization data and provides a theoretical basis for CCUS project site selection in China.

show abstract

“…CO 2 flooding can also reduce greenhouse gas emissions by burying CO 2 underground for long periods . At present, CO 2 miscible flooding has become a global research hot spot for enhanced oil recovery (EOR). − However, the heterogeneity of the reservoir often leads to gas channeling during CO 2 flooding, reducing the swept volume . Therefore, it is important that the EOR mechanism of CO 2 miscible flooding in heterogeneous reservoirs is studied to alleviate the impact of heterogeneity and further improve oilfield production.…”

Section: Introductionmentioning

confidence: 99%

Study on Enhanced Oil Recovery Mechanism of CO₂ Miscible Flooding in Heterogeneous Reservoirs under Different Injection Methods

Chen

Cao

et al. 2023

ACS Omega

View full text Add to dashboard Cite

The mechanism by which oil recovery can be enhanced by different injection methods of CO 2 miscible flooding to alleviate the influence of heterogeneous reservoirs was studied to optimize the injection methods, further improving oil recovery. According to the reservoir heterogeneity characteristics of the TI oil formation group in Lunnan Oilfield, a 1 m double-layer long core was designed and prepared for four CO 2 miscible displacement experiments with different injection methods. By analyzing the variation in the injection-production parameters, the displacement effects of different injection methods were compared, and the mechanism of enhanced oil recovery (EOR) was summarized. The results indicate the following. ① The displacement efficiency of the different injection methods lies in the following order. Alternate CO 2 −water injection, continuous CO 2 flooding, cyclic CO 2 flooding, and alternate CO 2 −hydrocarbon gas injection. ② The recovery of crude oil via CO 2 miscible flooding in heterogeneous reservoirs relies on both convective diffusion and miscible mass transfer. Convective diffusion depends mainly on control of the displacement pressure differential and the plugging of preferential seepage channels in high-permeability areas, while miscible mass transfer depends mainly on the swept range of the convective diffusion and the degree of miscibility between CO 2 and crude oil. ③ To improve the recovery efficiency of CO 2 miscible flooding in heterogeneous reservoirs, it is necessary to choose an injection method that optimizes these two aspects.

show abstract

Fundamental aspects, mechanisms and emerging possibilities of CO2 miscible flooding in enhanced oil recovery: A review

Cited by 111 publications

References 178 publications

Effect of CO₂ Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Effect of CO₂ Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Study on Enhanced Oil Recovery Mechanism of CO₂ Miscible Flooding in Heterogeneous Reservoirs under Different Injection Methods

Contact Info

Product

Resources

About

Fundamental aspects, mechanisms and emerging possibilities of CO2 miscible flooding in enhanced oil recovery: A review

Cited by 111 publications

References 178 publications

Effect of CO2 Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Effect of CO2 Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Evaluation of CO2enhanced oil recovery and CO2storage potential in oil reservoirs of petroliferous sedimentary basin, China

Study on Enhanced Oil Recovery Mechanism of CO2 Miscible Flooding in Heterogeneous Reservoirs under Different Injection Methods

Contact Info

Product

Resources

About

Effect of CO₂ Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Effect of CO₂ Huff-n-Puff Mode with a Horizontal Well on Shale Oil Recovery: A Three-Dimensional Experimental Study

Evaluation of CO₂enhanced oil recovery and CO₂storage potential in oil reservoirs of petroliferous sedimentary basin, China

Study on Enhanced Oil Recovery Mechanism of CO₂ Miscible Flooding in Heterogeneous Reservoirs under Different Injection Methods