Propagation Characteristics of Supercritical Carbon Dioxide Induced Fractures under True Tri-Axial Stresses

Hu, Yi; Liu, Feng; Hu, Yuqiang; Kang, Yong; Chen, Hao; Liu, Jiawei

doi:10.3390/en12224229

Cited by 15 publications

(5 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jia [108] and Zhao [109] studied the crack propagation behavior of supercritical CO 2 fracturing of shale and scanned the fracture section after fracturing by using laser three-dimensional scanning. Zou [110] and Hu [111] obtained fracture characteristics and parameters through artificial optical observation and fracture images.…”

Section: Crack Growth Law Of Supercritical Co 2 Fracturingmentioning

confidence: 99%

A Review of Supercritical CO2 Fracturing Technology in Shale Gas Reservoirs

Hou,

Yuan,

Chen

et al. 2024

Processes

View full text Add to dashboard Cite

Shale gas reservoirs generally exhibit characteristics such as low porosity, permeability, and pore throat radius, with high airflow resistance. Currently, hydraulic fracturing is a commonly used method for commercial shale gas extraction; however, the hydraulic fracturing method has exhibited a series of issues, including water sensitivity and reservoir pollution in shale reservoirs. Therefore, the development of anhydrous fracturing technology suitable for shale gas reservoirs has become an urgent requirement. The supercritical carbon dioxide fracturing technique has the merits of reducing reservoir damage, improving recovery and backflow rates, and saving water resources. Moreover, this technique has broad application prospects and can achieve the effective extraction of shale gas. To enhance the understanding of the supercritical carbon dioxide fracturing technique, this review summarizes the progress of current research on this technique. Furthermore, this study analyzes the stage control technology of supercritical carbon dioxide during the fracturing process, the interaction characteristics between supercritical carbon dioxide and rocks, and the laws of rock initiation and crack growth in supercritical carbon dioxide fracturing. The outcomes indicate that after SC-CO2 enters the reservoir, CO2 water–rock interaction occurs, which alters the mineral composition and pore throat framework, weakens the mechanical characteristics of shale, reduces the rock fracturing pressure, and increases the complexity of the fracturing network. This article provides a reference for research related to supercritical carbon dioxide fracturing technology and is greatly significant for the development of shale gas reservoirs.

show abstract

Section: Crack Growth Law Of Supercritical Co 2 Fracturingmentioning

confidence: 99%

A Review of Supercritical CO2 Fracturing Technology in Shale Gas Reservoirs

Hou,

Yuan,

Chen

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

“…To investigate the effect of fracturing fluid type on the breakdown pressure of shale, the breakdown pressures of Zhang et al (2017), Deng et al (2018), He et al (2018), Zhao et al (2018), Zhou et al (2018), Chen et al (2019Chen et al ( , 2021a, Hu et al (2019), Ranjith et al (2019) and Jia et al (2020), using different fracturing fluids to fracture shale were summarized, as shown in Fig. 4.…”

Section: The Effect Of Fracturing Fluid 311 Breakdown Pressurementioning

confidence: 99%

Experimental Research on Supercritical Carbon Dioxide Fracturing of Sedimentary Rock: A Critical Review

Zheng

et al. 2023

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

Supercritical carbon dioxide (ScCO2) fracturing has great advantages and prospects in both shale gas exploitation and CO2 storage. This paper reviews current laboratory experimental methods and results for sedimentary rocks fractured by ScCO2. The breakdown pressure, fracture parameters, mineral composition, bedding plane angle and permeability are discussed. We also compare the differences between sedimentary rock and granite fractured by ScCO2, ultimately noting problems and suggesting solutions and strategies for the future. The analysis found that the breakdown pressure of ScCO2 was reduced 6.52%–52.31% compared with that of using water. ScCO2 tends to produce a complex fracture morphology with significantly higher permeability. When compared with water, the fracture aperture of ScCO2 was decreased by 4.10%–72.33%, the tortuosity of ScCO2 was increased by 5.41%–70.98% and the fractal dimension of ScCO2 was increased by 4.55%–8.41%. The breakdown pressure of sandstone is more sensitive to the nature of the fracturing fluid, but fracture aperture is less sensitive to fracturing fluid than for shale and coal. Compared with granite, the tortuosity of sedimentary rock is more sensitive to the fracturing fluid and the fracture fractal dimension is less sensitive to the fracturing fluid. Existing research shows that ScCO2 has the advantages of low breakdown pressure, good fracture creation and environmental protection. It is recommended that research be conducted in terms of sample terms, experimental conditions, effectiveness evaluation and theoretical derivation in order to promote the application of ScCO2 reformed reservoirs in the future.

show abstract

“…Additionally, Li et al (2016) indicate that a positive relation may exist between the minimum principal stress and the formation breakdown pressure. The fracturing experiments (using water and SC-CO 2 ) performed by Zhang et al (2017), He et al (2020), Zhao et al (2018), and Hu et al (2019) − suggest that the fracturing process is influenced not only by fluids but also by the bedding planes, pre-existing natural fractures, in situ stresses, etc.…”

Section: Introductionmentioning

confidence: 99%

“…have been employed in previous studies to characterize fracture properties (such as the morphology, complexity, roughness, etc. ), ,,− these tools either lack measurement accuracy or cannot be applied on an entire core plug or sample . To achieve a full-sample quantitative analysis of fracturing, we propose a more accurate and nondestructive method to investigate the fracture morphology.…”

Section: Introductionmentioning

confidence: 99%

Full-Sample X-ray Microcomputed Tomography Analysis of Supercritical CO₂ Fracturing in Tight Sandstone: Effect of Stress on Fracture Dynamics

et al. 2021

View full text Add to dashboard Cite

The commercial production from tight oil and gas reservoirs has been facilitated by the multistage hydraulic fracturing of horizontal wells. This process typically requires the pumping of large amounts of slick water into the subsurface, and this could be challenging in areas with a limited supply of water. Despite the commercial success of hydraulic fracturing with water, it still faces the problem of clay swelling and potential contamination of underground water. This has led to research studies and field applications of liquid or supercritical carbon dioxide (SC-CO2) fracturing in unconventional oil and gas resources. Considering that the propagation and characteristics of these man-made fractures are controlled by the fracturing fluid and mechanical state of the reservoir, we performed a series of fracturing experiments on tight sandstones using water and SC-CO2 at different stress magnitudes. To explore the morphology of the fractures and quantify their attributes, we proposed a novel full-sample fracture analysis approach, which is based on microcomputed tomography (CT) imaging. The results of this study indicate that the breakdown pressure is a linear function of the minimum principal stress and tensile strength. We observe that the pattern and geometry of the fractures created from SC-CO2 fracturing is more complex than those of water fracturing under the same stress conditions. Our experimental results also indicate that smaller differential stresses lead to the creation of more fracture branches and that fracture propagation is significantly affected by the presence of initial bedding planes. Furthermore, our quantification of the fracture attributes (based on fracture extraction and digitization) indicates that SC-CO2 fracturing leads to the creation of more complex fractures with rougher surfaces than water fracturing. This experimental study proposes a new full-sample fracture quantification approach, which can be implemented to analyze fracture attributes precisely and effectively. The results from this work could provide insights and guidance for the field application of SC-CO2 fracturing in unconventional oil and gas resources.

show abstract

Propagation Characteristics of Supercritical Carbon Dioxide Induced Fractures under True Tri-Axial Stresses

Cited by 15 publications

References 50 publications

A Review of Supercritical CO2 Fracturing Technology in Shale Gas Reservoirs

A Review of Supercritical CO2 Fracturing Technology in Shale Gas Reservoirs

Experimental Research on Supercritical Carbon Dioxide Fracturing of Sedimentary Rock: A Critical Review

Full-Sample X-ray Microcomputed Tomography Analysis of Supercritical CO₂ Fracturing in Tight Sandstone: Effect of Stress on Fracture Dynamics

Contact Info

Product

Resources

About

Propagation Characteristics of Supercritical Carbon Dioxide Induced Fractures under True Tri-Axial Stresses

Cited by 15 publications

References 50 publications

A Review of Supercritical CO2 Fracturing Technology in Shale Gas Reservoirs

A Review of Supercritical CO2 Fracturing Technology in Shale Gas Reservoirs

Experimental Research on Supercritical Carbon Dioxide Fracturing of Sedimentary Rock: A Critical Review

Full-Sample X-ray Microcomputed Tomography Analysis of Supercritical CO2 Fracturing in Tight Sandstone: Effect of Stress on Fracture Dynamics

Contact Info

Product

Resources

About

Full-Sample X-ray Microcomputed Tomography Analysis of Supercritical CO₂ Fracturing in Tight Sandstone: Effect of Stress on Fracture Dynamics