Influence of Sedimentation Heterogeneity on CO2 Flooding

Park, Hyuck; Jiang, Lanlan; Kiyama, Tamotsu; Zhang, Yi; Ueda, Ryo; Nakano, Masami; Xue, Ziqiu

doi:10.1016/j.egypro.2017.03.1422

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…The 23 vertical wells in the JL2 reservoir had an average initial production of 4.2 t/d, resulting in low production and poor development. So far, CCUS and its application have been carried out worldwide and achieved remarkable results for low-permeability reservoirs (Park et al, 2017;Khather et al, 2019). The numerical simulation of this reservoir proves that CO 2 flooding is an effective EOR method for low-permeability conglomerate reservoir (Huang et al, 2016;Ding et al, 2017).…”

Section: Introductionmentioning

confidence: 96%

Study on the Influencing Factors of Productivity of a CO2-Driven Horizontal Well in a Conglomerate Reservoir

Chen

et al. 2022

Front. Energy Res.

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Section: Introductionmentioning

confidence: 96%

Study on the Influencing Factors of Productivity of a CO2-Driven Horizontal Well in a Conglomerate Reservoir

Chen

et al. 2022

Front. Energy Res.

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“…Wei et al 20 used NMR-assisted core flooding experiments to systematically evaluate five EOR methods: water flooding, modified water flooding, CO 2 flooding, alternate water–CO 2 injection, and alternate surfactant–CO 2 injection, and revealed the associated microscopic oil displacement mechanisms. In a study investigating the influence mechanism of reservoir heterogeneity on CO 2 flooding, Park et al 21 used X-ray CT scanning to compare the CO 2 saturation, total fluid recovery, and oil recovery of homogeneous and heterogeneous sandstones. The obtained flow characteristics of CO 2 in heterogeneous reservoirs proved that sedimentary heterogeneity is one of the main factors affecting the CO 2 flooding pattern.…”

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

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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.

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“…At present, CO 2 injection technology is considered to be an effective technology to improve the oil recovery of low permeability reservoirs [12]. Park et al [13] chose Berea Sandstone and Sarukawa Sandstone to conduct CO 2 flooding experiments in porous sandstone. The results show that when the injected CO 2 reached about 2.0 PV, Berea sandstone's soil recovery was 74.80%, Sarukawa sandstone's oil recovery was 71.39%, and CO 2 diffused into Berea sandstone evenly from the injected part.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of ASP Flooding on Improving Oil Recovery in Low Permeability Reservoirs Based on a Partial Quality Tool

Huang

et al. 2020

Processes

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In order to solve the problem of the poor oil displacement effect of high molecular weight alkali/surfactant/polymer (ASP) solution in low permeability reservoirs, Daqing Oilfield uses a partial quality tool to improve the oil displacement effect in low permeability reservoirs. In the formation, the partial quality tool degrades the polymer through active shearing action, reducing the molecular weight of the polymer, to improve the matching degree to the low permeability oil layer and the oil recovery. In order to study the ability of the partial quality tool to improve the oil displacement effect, the matching degree of high molecular weight ASP solution to low permeability cores is studied, and the ability of quality control tools to change the molecular weight is studied. Then, experimental research on the pressure and oil displacement effect of high molecular weight ASP solution before and after the actions of the partial quality tool is carried out. The results show that ASP solutions with molecular weights of 1900 × 104 and 2500 × 104 have a poor oil displacement effect in low permeability reservoirs. After the action of the partial quality tool, the injection pressure is reduced by 5.22 MPa, and the oil recovery is increased by 7.79%. The injection pressure of the ASP solution after shearing by the partial quality tool is lower than that of the ASP solution with the same molecular weight and concentration without shearing, but the oil recovery is lower. On the whole, the use of the partial quality tool can obviously improve the oil displacement effect in low permeability reservoirs.

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Influence of Sedimentation Heterogeneity on CO2 Flooding

Cited by 15 publications

References 6 publications

Study on the Influencing Factors of Productivity of a CO2-Driven Horizontal Well in a Conglomerate Reservoir

Study on the Influencing Factors of Productivity of a CO2-Driven Horizontal Well in a Conglomerate Reservoir

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

Experimental Study on the Effect of ASP Flooding on Improving Oil Recovery in Low Permeability Reservoirs Based on a Partial Quality Tool

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Influence of Sedimentation Heterogeneity on CO2 Flooding

Cited by 15 publications

References 6 publications

Study on the Influencing Factors of Productivity of a CO2-Driven Horizontal Well in a Conglomerate Reservoir

Study on the Influencing Factors of Productivity of a CO2-Driven Horizontal Well in a Conglomerate Reservoir

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

Experimental Study on the Effect of ASP Flooding on Improving Oil Recovery in Low Permeability Reservoirs Based on a Partial Quality Tool

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