Key problems and solutions in supercritical CO2 fracturing technology

Wang, Haizhu; Li, Gensheng; Zhu, Bo; Sepehrnoori, Kamy; Shi, Liang; Zheng, Yong; Shi, Xiaomei

doi:10.1007/s11708-019-0626-y

Cited by 23 publications

(12 citation statements)

References 21 publications

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“…The injection process was associated with ultralow density proppant to improve the migration effect, and microseismic monitoring recorded the fracture characteristics of SCCO 2 fracturing and adjacent well hydraulic fracturing. 43,52 This was the first field test of SCCO 2 fracturing of continental shale gas reservoirs globally, and promising results were obtained. The results indicated that under the influence of stress factors, hydraulic fracturing fractures are mainly distributed along the direction of maximum horizontal principal stress, while SCCO 2 fracturing can break through the limitation of stress factors on fracture morphology.…”

Section: Stimulation Of Shale Gas Reservoir Bymentioning

confidence: 99%

“…In contrast, the surface tension of water-based fracturing fluid is in the range of 50−70 mN/ m, 42 which increases the flow resistance in the fracture and makes it difficult for the fluid to enter the fracture tip, resulting in a poor fracture propagation effect (Figure 2). Namely, SCCO 2 would better change the fluid pressure distribution in the pores and fractures of shale gas reservoirs, which is more likely to cause the reduction of effective stress and rock strength around the wellbore, 43 making the surrounding rocks easier to crack, inducing more extensive microfractures, and producing better fracturing effects.…”

Section: Stimulation Of Shale Gas Reservoir Bymentioning

confidence: 99%

“…Figure 5. Comparison between SCCO 2 and hydraulic fracturing in continental shale gas reservoirs 43. …”

mentioning

confidence: 99%

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Progress and Prospects of Supercritical CO₂ Application in the Exploitation of Shale Gas Reservoirs

et al. 2021

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The breakthrough of clean and efficient shale gas stimulation technology and reduction of global carbon emissions is in a critical period. The injection of supercritical carbon dioxide (SCCO 2 ) into shale gas reservoirs, fracturing the reservoir and displacing preadsorbed CH 4 , enhancing gas recovery, and completing CO 2 geological storage, is regarded as an optimum scheme due to its engineering advantages and high adsorption capacity and preference in shale. This investigation systemically summarizes the theoretical understanding and research progress on SCCO 2 fracturing technology and the displacement of CH 4 by CO 2 in shale gas development practice and theoretical simulation in the past decade and proposes the current challenges and prospects. The fracture space distribution characteristics of hydraulic fracturing and SCCO 2 fracturing and the stimulation effectiveness of the shale gas reservoir are compared. The low viscosity, high diffusion coefficient, and zero surface tension of SCCO 2 bring up its distinctive advantages for fracturing engineering. And the recovery of CH 4 is much higher than that from hydraulic fracturing. The adsorption capacity and preference for CO 2 are greater than those for CH 4 , caused by its molecular structure, properties, thermodynamics, and kinetics. Shale gas reservoirs are widely distributed and enormous resources. Several shale gas reservoirs in several basins are deemed to store CO 2 by several to tens of gigatons. However, the wide commercial application of CO 2 has been limited due to (i) the high cost of CO 2 capture and transportation, (ii) low sand carrying capacity, nonuniform distribution, and easy settlement of proppant, (iii) the complex coupling mechanism of CO 2 −CH 4 − H 2 O−shale, and (iv) the environmental threat after CO 2 storage. Therefore, it is urgent to develop a thickener and cosolvent with economical, clean, safe, and environmentally friendly characteristics that is highly compatible with SCCO 2 . High-precision reduction models of the structural characteristics and pore-fracture distribution characteristics of kerogen and mineral components are necessary to simulate competitive adsorption of CO 2 and CH 4 . Additionally, a perfect monitoring system for CO 2 leakage risk should be established near CO 2 storage sites to avoid impact and harm to the atmosphere, groundwater, and surface ecosystems.

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Section: Stimulation Of Shale Gas Reservoir Bymentioning

confidence: 99%

Section: Stimulation Of Shale Gas Reservoir Bymentioning

confidence: 99%

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Progress and Prospects of Supercritical CO₂ Application in the Exploitation of Shale Gas Reservoirs

et al. 2021

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“…15). (i) Supercritical CO2 fracturing technology for shale gas reservoir, which has been successfully practiced and achieved promising effectiveness [95] . (ii) CO2 competitive adsorbs with CH4 to promote it desorption, and improves CH4 recovery.…”

Section: The Implication On Co2 Sequestration and Enhanced Ch4 Recoverymentioning

confidence: 99%

Effects of gas components, reservoir property and pore structure of shale gas reservoir on the competitive adsorption behavior of CO2 and CH4

Xie

Meng

Chen

et al. 2022

Energy

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“…Compared with other fracturing technologies, supercritical carbon dioxide fracturing technology has the following advantages [20][21]:…”

Section: Supercritical Co 2 Fracturing Technologymentioning

confidence: 99%

Research Progress of Anhydrous Fracturing

Duan¹,

Zhang²,

Zhao³

2022

AJST

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Oil and gas reserves in our country are large and widely distributed, and usually fracturing techniques are needed to extract oil and gas. Currently, the more mature hydraulic fracturing technology is difficult to extract coal bed methane. Combined with the research progress of fracturing at home and abroad, this paper summarizes the development of relevant anhydrous fracturing technology, fracturing fluid, fracturing process and other aspects, compares and analyzes the advantages and disadvantages of fracturing technology, and provides some ideas for the development of anhydrous fracturing technology in the future. In order to reduce the cost of anhydrous fracturing, meet the requirements of field application, and accelerate the research progress of anhydrous fracturing, the commonly used fracturing technologies are combined to study new fracturing fluids and carry out composite anhydrous fracturing.

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Key problems and solutions in supercritical CO2 fracturing technology

Cited by 23 publications

References 21 publications

Progress and Prospects of Supercritical CO₂ Application in the Exploitation of Shale Gas Reservoirs

Progress and Prospects of Supercritical CO₂ Application in the Exploitation of Shale Gas Reservoirs

Effects of gas components, reservoir property and pore structure of shale gas reservoir on the competitive adsorption behavior of CO2 and CH4

Research Progress of Anhydrous Fracturing

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Key problems and solutions in supercritical CO2 fracturing technology

Cited by 23 publications

References 21 publications

Progress and Prospects of Supercritical CO2 Application in the Exploitation of Shale Gas Reservoirs

Progress and Prospects of Supercritical CO2 Application in the Exploitation of Shale Gas Reservoirs

Effects of gas components, reservoir property and pore structure of shale gas reservoir on the competitive adsorption behavior of CO2 and CH4

Research Progress of Anhydrous Fracturing

Contact Info

Product

Resources

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Progress and Prospects of Supercritical CO₂ Application in the Exploitation of Shale Gas Reservoirs

Progress and Prospects of Supercritical CO₂ Application in the Exploitation of Shale Gas Reservoirs