Mineral dissolution and mobilization during CO 2 injection into the water-flooded layer of the Pucheng Oilfield, China

Tang, Yongqiang; Lv, Chengyuan; Wang, Rui; Cui, Meng

doi:10.1016/j.jngse.2016.06.073

Cited by 36 publications

(27 citation statements)

References 23 publications

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“…But research on the CO 2 -flooding effect in lowpermeability reservoirs has been specific to the influencing factors that are easily observable, such as injection speed, injection pressure, number of injected pore volumes (PVs), oil production speed, different components, and various injection modes (Zhao et al 2018;Chen et al 2010;Cerasi et al 2016;Huang et al 2019;Cui et al 2018;Zhou et al 2016). However, for the influencing factors that are difficult to observe, research usually has not included specific analysis (Huang et al 2018;Tang et al 2016;Zhou et al 2017;Wang et al 2015;Huang et al 2017), has been less detailed, or has neglected to include capillary pressure and CO 2 dissolution.…”

Section: Introductionmentioning

confidence: 99%

Functions of capillary pressure and dissolution in the CO2-flooding process in low-permeability reservoirs

Huang

Zhang

Yan

et al. 2020

J Petrol Explor Prod Technol

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CO 2 flooding has become one of most effective methods to improve oil recovery in low-permeability reservoirs. Thus, influencing factors have been specifically analyzed for their impact on oil displacement. Factors that are difficult to observe, such as capillary pressure and CO 2 dissolution, have often been neglected in specific analysis. To do so, this paper combined laboratory experimentation with numerical simulation analysis to understand the specific functions of capillary pressure and CO 2 dissolution in the CO 2-flooding process in low-permeability reservoirs. Based on laboratory experiments with long cores applying different CO 2-flooding methods, the authors established a one-dimensional numerical simulation model for CO 2 flooding. After that, the model was simulated to analyze the effects of capillary pressure and CO 2 dissolution for different CO 2-flooding processes. The results show that the function of capillary pressure in different CO 2-flooding modes is not consistent in low-permeability reservoirs; furthermore, capillary pressure is a driving force in the process of flooding and is a resistance force in the CO 2-flooding process after pressure recovery. When considering CO 2 dissolution in different flooding modes, its function was shown to be inconsistent in low-permeability reservoirs compared with CO 2 flooding without considering CO 2 dissolution; oil recovery is reduced in the CO 2-flooding process, but oil recovery increases in the CO 2-flooding process after pressure recovery. Therefore, in order to promote the rational and effective development of lowpermeability reservoirs, it is necessary to understand the functions of capillary pressure and CO 2 dissolution clearly in the process of CO 2 flooding.

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Section: Introductionmentioning

confidence: 99%

Functions of capillary pressure and dissolution in the CO2-flooding process in low-permeability reservoirs

Huang

Zhang

Yan

et al. 2020

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

show abstract

“…Many related studies have successfully investigated the CO 2 flooding mechanism and CO 2 storage. CO 2 flooding can be divided into miscible, near‐miscible, and immiscible phases .…”

Section: Introductionmentioning

confidence: 99%

“…During the CO 2 flooding process, injected CO 2 displaces oil and occupies the pore space, and then a part of CO 2 dissolves in the ground water and remaining oil . Dissolved CO 2 reacts with rock, and then CO 2 is mineral trapped in the formation . Injected CO 2 is trapped within pores and throats because of the capillary pressure .…”

Section: Introductionmentioning

confidence: 99%

“…Many related studies [1][2][3][5][6][7][8][9][10][11][12][13] have successfully investigated the CO 2 flooding mechanism and CO 2 Y He et al…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies focus on the impact of CO 2 –water–rock interactions on CO 2 storage. Previous experimental studies on CO 2 –water–rock interactions were mainly focused on the dissolution and precipitation of carbonate minerals, the feldspar dissolution, the corrosion in the clay, and some secondary minerals’ formation. Bertier and Swennen performed experiments to compare the permeability of Westphanlian and Butsandstein sandstone samples before and after CO 2 flooding.…”

Section: Introductionmentioning

confidence: 99%

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Water–rock–CO₂ interactions and CO₂ storage of Honghe tight oil reservoirs: an experimental and simulation study

Yang

et al. 2019

Greenhouse Gases

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CO2 flooding is essential for significantly enhancing oil recoveries and long‐term CO2 storage. We performed CO2 flooding experiments on target tight cores obtained from Honghe oilfield to investigate the water–rock interaction during CO2 flooding. In addition, we investigate the impact of mineralization and CO2 injection patterns on the sweep efficiency and CO2 long‐term storage using numerical simulations. Results show target core samples are composed of calcite, quartz, Na‐feldspar, and K‐feldspar. In particular, the main water–rock interactions during CO2 flooding are calcite and Na‐feldspar dissolution. The impact of water–rock interactions on the reformation of the matrix is not significant. However, such water–rock interactions will decrease the permeability of the natural fracture system near injection wells, which will lead to the enhancement of CO2 flooding efficiency in fractured formations. In addition, results show that water alternating gas injection will enhance oil recovery and CO2 primary storage. After CO2 flooding, mineral‐trapped CO2 is only 0.53wt.% of the total CO2 storage. As the flooding time increases, the mineral‐trapped CO2 increases. Results show that mineral‐trapped CO2 is 31.08% of the total CO2 storage at the simulation time of 500 years. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Influence of Brine–Rock Parameters on Rock Physical Changes During CO2 Sequestration in Saline Aquifer

et al. 2021

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Mineral dissolution and mobilization during CO 2 injection into the water-flooded layer of the Pucheng Oilfield, China

Cited by 36 publications

References 23 publications

Functions of capillary pressure and dissolution in the CO2-flooding process in low-permeability reservoirs

Functions of capillary pressure and dissolution in the CO2-flooding process in low-permeability reservoirs

Water–rock–CO₂ interactions and CO₂ storage of Honghe tight oil reservoirs: an experimental and simulation study

Influence of Brine–Rock Parameters on Rock Physical Changes During CO2 Sequestration in Saline Aquifer

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Mineral dissolution and mobilization during CO 2 injection into the water-flooded layer of the Pucheng Oilfield, China

Cited by 36 publications

References 23 publications

Functions of capillary pressure and dissolution in the CO2-flooding process in low-permeability reservoirs

Functions of capillary pressure and dissolution in the CO2-flooding process in low-permeability reservoirs

Water–rock–CO2 interactions and CO2 storage of Honghe tight oil reservoirs: an experimental and simulation study

Influence of Brine–Rock Parameters on Rock Physical Changes During CO2 Sequestration in Saline Aquifer

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Water–rock–CO₂ interactions and CO₂ storage of Honghe tight oil reservoirs: an experimental and simulation study