Article
Energy & Fuels
Zijia Liao, Zhaozhong Yang, Qi Xue, Xiaogang Li, Huabin Li, Wenhong Li
Summary: This study used finite element model to investigate the embedment and crushing of hollow proppants, identifying the sensitivity parameters under closure stress and the effects of proppant size and hollow structure on embedment and crushing. The results provide insights for the optimal design of hollow proppants.
ENERGY SCIENCE & ENGINEERING
(2021)
Review
Green & Sustainable Science & Technology
Zijia Liao, Xiaogang Li, Lei Ge, Zhaozhong Yang, Jingyi Zhu, Qi Xue, Hao Wang
Summary: This research provides a comprehensive analysis of lightweight proppants. It covers the research advances made on lightweight proppants in both scientific literature and commercial proppants manufacturers. The paper discusses three varieties of lightweight proppants: hollow/porous proppants, surface-modified proppants, and proppants derived from low-density materials. Field application of lightweight proppant in scale inhibition, gravel packing, and hydraulic fracturing is also summarized. Furthermore, the research highlights the future research directions and obstacles of lightweight propellants.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Energy & Fuels
Jian-Hua Li, Bo-Bo Li, Qiao-Yun Cheng, Zheng Gao
Summary: Hydraulic fracturing technology is crucial in improving the recovery rate of shale gas. This study proposes a permeability model to examine the combined effects of a proppant and stress on permeability, taking into account changes in fracture width and porosity. The model quantifies and analyzes the compressibility and permeability of supported fractures, and its rationality is verified through test data.
Article
Chemistry, Multidisciplinary
Tamas Lengyel, Attila Varga, Ferenc Safranyik, Anita Jobbik
Summary: Hydraulic fracturing is a well-known production intensification technique in the petroleum industry that aims to enhance well productivity. The method developed in this article combines Discrete Element Method and Finite Element Method to describe fracture behavior. By comparing numerical model results with laboratory data, the effectiveness of the method was validated, providing new perspectives for explorers and engineers in understanding propped hydraulic fracture operation.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Geological
Jiayi Yu, Jiehao Wang, Shugang Wang, Yan Li, Amit Singh, Peggy Rijken, Derek Elsworth
Summary: This study investigates the evolution of fracture conductivity as a function of proppant loading concentration and effective stress, simulating reservoir drawdown. The results show that proppant crushing, proppant embedment, and particulate transport have significant impacts on fracture conductivity. Additionally, increasing proppant loading concentration can mitigate the stress sensitivity of conductivity.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Thermodynamics
Mingkun Lv, Tiankui Guo, Xuliang Jia, Duwu Wen, Ming Chen, Yunpeng Wang, Zhanqing Qu, Daibing Ma
Summary: This study investigates the impact of two different pump schedules on proppant transport behavior and sand dune shape through experiments and numerical simulations. The results show that a pump schedule with constant proppant concentration facilitates proppant transport and reduces flow fluctuations, while a pump schedule with stepwise increasing proppant concentration enhances the filling of near-well fractures.
Article
Energy & Fuels
S. Hari, Shanker Krishna, Laxmi Nandan Gurrala, Sanjeev Singh, Nikhil Ranjan, Rakesh Kumar Vij, Subhash N. Shah
Summary: Hydraulic fracturing is an effective tool for stimulating reservoirs and ensuring economic gas production. The use of proppants to maintain fracture conductivity is crucial in this process. This paper reviews experimental studies on sandstone formations to analyze factors intensifying proppant crushing and embedment, with a focus on maintaining fracture conductivity.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Songyang Tong, Chammi Miller, Kishore K. Mohanty
Summary: This study focuses on improving microfracture conductivity in shale reservoirs by injecting reactive chemicals to create in-situ proppants. Batch experiments and reactive flow experiments were conducted, showing a significant increase in fracture conductivity and decreased production decline.
Article
Thermodynamics
Silabrata Pahari, Parth Bhandakkar, Mustafa Akbulut, Joseph Sang-Il Kwon
Summary: The use of non-Newtonian high-viscosity gel in hydraulic-fractured unconventional reservoirs can enhance hydrocarbon recovery, but the understanding of gel rheology's role in production is limited. Researchers developed a model to simulate the impact of different rheological parameters on oil production, guiding the optimization of gel selection and pumping schedules. The study aims to maximize oil production from unconventional reservoirs by utilizing optimal high-viscosity gel and designing a model predictive controller for pumping schedules.
Article
Chemistry, Physical
Tomasz Suponik, Krzysztof Labus, Rafal Morga
Summary: In order to improve the efficiency of methane extraction from coal beds, hydraulic fracturing technology is used. However, there are technical problems associated with stimulation operations in soft rocks, such as coal beds, mainly due to the embedment phenomenon. To address this, a novel coke-based proppant was introduced. The study aimed to identify the source coke material for further processing to obtain a proppant.
Article
Engineering, Multidisciplinary
Shaowen Mao, Kan Wu, George Moridis
Summary: This paper develops an integrated hydraulic fracturing simulator by coupling a planar three-dimensional fracture propagation model with an efficient Eulerian-Lagrangian proppant transport model. The simulator can efficiently deal with multi-modal particle simulations and improve the prediction of effective/propped fracture geometries. The simulation results can better the fracturing designs.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Energy & Fuels
M. A. A. Ahamed, M. S. A. Perera, D. Elsworth, P. G. Ranjith, S. K. M. Matthai, Li Dong-yin
Summary: Commercial production of coal seam gas plays a significant role in the global natural gas supply due to its high gas storage capacity at shallow extraction depths. The use of proppants in coal seam gas recovery can enhance gas recovery in deep coal seams, with potential for significant improvement in fracture conductivity. However, the impact of proppant embedment on fracture conductivity degradation is significant and dependent on the stiffness of the coal rock matrix and type of proppant used.
Article
Energy & Fuels
Faisal Mehmood, Jianxing Liao, Michael Z. Hou, Muhammad Khurram Zahoor, Ying Xiong
Summary: The rapid recovery of natural gas from large-scale unconventional resources is crucial given its increasing demand and importance in the global energy mix. This research investigates the use of rod-shaped proppants to improve fracture conductivity. Through experiments and sensitivity analysis using the FLAC3D(plus)-TMVOC framework, the effects of different proppant shapes on post-fracture performance were analyzed.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Energy & Fuels
C. P. Zhang, P. Cheng, Z. Y. Ma, P. G. Ranjith, J. P. Zhou
Summary: The study compared the fracturing efficiency of CO2-based fracturing (CBF) and water-based fracturing (WBF) on siltstone samples, revealing that CBF has lower breakdown pressure and greater fracture aperture compared to WBF, which helps create more complex and efficient fracture networks.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Geological
Ekrem Alagoz, Haotian Wang, Rodney T. Russell, Mukul M. Sharma
Summary: Productivity decline in fractured wells due to severe proppant embedment is not well understood, with few models considering embedment when predicting decline. New experimental techniques were developed to characterize proppant embedment mechanisms and properties, showing that plastic and creep deformation dominate embedment in shale.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Ismael Vera Rodriguez, Sergey Stanchits, Jeffrey Burghardt
ROCK MECHANICS AND ROCK ENGINEERING
(2017)
Article
Engineering, Geological
Liang Pei, Guido Bloecher, Harald Milsch, Gunter Zimmermann, Ingo Sass, Ernst Huenges
ROCK MECHANICS AND ROCK ENGINEERING
(2018)
Article
Engineering, Petroleum
Thomas Reinsch, Stefan Kranz, Ali Saadat, Ernst Huenges, Manfred Rinke, Wulf Brandt, Peter Schulz
SPE PRODUCTION & OPERATIONS
(2017)
Article
Energy & Fuels
G. Winterleitner, F. Schuetz, C. Wenzlaff, E. Huenges
Article
Green & Sustainable Science & Technology
Pierre Cerasi, Anna Stroisz, Eyvind Sonstebo, Sergey Stanchits, Volker Oye, Robert Bauer
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2018)
Article
Geochemistry & Geophysics
Jorn Davidsen, Thomas Goebel, Grzegorz Kwiatek, Sergei Stanchits, Jordi Baro, Georg Dresen
Summary: The experimental results show that pronounced aftershock sequences are typically not observable at high stress levels. Instead, the presence of large scale imperfections such as a notch in the rock sample is necessary to observe aftershocks before the sample breaks, or consideration must be given to the period of relaxation after the sample breaks.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Energy & Fuels
Anna Shevtsova, Sergey Stanchits, Maria Bobrova, Egor Filev, Sergey Borodin, Vladimir Stukachev, Lyubov Magadova
Summary: This paper presents the results of an experimental study on the influences of hydraulic fracturing fluids on the process of hydraulic fracturing of granite samples. It is found that the viscosity of the fracturing fluid affects the parameters of the created hydraulic fractures. Laboratory experiments can provide comprehensive information for the application of new hydraulic fracturing techniques in field conditions.
Article
Multidisciplinary Sciences
Volker Oye, Sergey Stanchits, Oladipupo Babarinde, Robert Bauer, Anna Maria Dichiarante, Nadege Langet, Bettina Goertz-Allmann, Scott Frailey
Summary: To study the mechanism of fluid-induced seismicity, a large-scale laboratory experiment was conducted and compared with field-scale observations. It was found that the existence of fluid pathways plays a decisive role in the potential of induced seismicity.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Oladipupo Babarinde, Sergey Stanchits, Robert Bauer, Scott Frailey, Volker Oye, Dustin Sweet
Summary: In this study, a large-scale triaxial block experiment was conducted on Castlegate Sandstone to investigate the mechanisms causing microseismicity at a CO2 injection site. The experiment revealed that the crushing and flattening of fault surfaces were correlated with the spatiotemporal distribution of microseismic events near the fault. The presence of thicker fault gouge and smaller grain size in areas with wider aperture suggests a link between fault characteristics and microseismic activity.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Anna Shevtsova, Sergey Stanchits, Egor Filev, Tagir Karamov, Vladimir Stukachev, Mikhail Spasennykh
Summary: This study conducted laboratory experiments to investigate the parameters of hydraulic fractures in dry and mineral-oil-saturated rocks and compared them with the geomechanical characteristics of the tested samples. Sandstone and thermally treated granite were chosen as the research materials. There is limited research on the mechanical and acoustic properties of oil-saturated rocks, and even less on the parameters of hydraulic fractures in such rocks. The study used independent sensors to measure the axial deformation, fluid pressure, fluid volume injected into the fractures, and localization of acoustic emission events during fracture propagation.
Article
Energy & Fuels
Yong Zheng, Haizhu Wang, Bin Wang, Ergun Kuru, Jun Ni, Hai Huang, Alexey Cheremisin, Sergey Stanchits
Summary: The study investigated the effects of different parameters of roughness on the efficiency of proppant transport using supercritical CO2. The ratio of proppant diameter to average width of rough fracture and the variation of root mean square of asperity height values and fractal dimensions were found to have significant impacts on proppant transport. This research provides valuable insights into the behavior of proppant transport in rough rock fractures using supercritical CO2.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Yuxi Zang, Quan Wang, Haizhu Wang, Bin Wang, Kangjian Tian, Tianyu Wang, Jie Li, Zhichao Zhang, Shouceng Tian, Sergey Stanchits, Alexey Cheremisin, Yaniv Edery
Summary: Hydraulic fracturing, particularly in unconventional reservoirs, is a vital technology for reservoir stimulation. Conventional water-based fracturing methods can lead to environmental pollution and water resource wastage. An alternative method using anhydrous fracturing fluids, such as supercritical CO2 (SC-CO2), has been developed in recent years. However, the fundamental mechanism of fracture initiation and propagation during SC-CO2 fracturing is not yet fully understood. In this study, a tri-axial fracturing visualization equipment was used to conduct experiments under reservoir conditions. The results showed that low-viscosity fluids tend to induce micro-fractures, while relatively high-viscosity fluids tend to form simple fractures. SC-CO2 demonstrates strong diffusivity and can easily enter micro-fractures. The breakdown pressure and fracture initiation time for SC-CO2 fracturing were found to be lower and later, respectively, compared to liquid CO2 (L-CO2) fracturing. The DIC method was used to quantitatively monitor the fracture characteristics, and the results provided valuable insights into the fracturing mechanism.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Maria Bobrova, Sergey Stanchits, Anna Shevtsova, Egor Filev, Vladimir Stukachev, Tagir Shayahmetov
Summary: The paper presents a laboratory study on the impact of rock fabric heterogeneity on hydraulic fracturing, establishing correlations between HF parameters and geomechanical characteristics, and using various laboratory techniques to determine parameters for verification of hydraulic fracturing models.
Article
Energy & Fuels
Felina Schuetz, Gerd Winterleitner, Ernst Huenges
Proceedings Paper
Engineering, Geological
Elli-Maria Charalampidou, Sergei Stanchits, Georg Dresen
BIFURCATION AND DEGRADATION OF GEOMATERIALS WITH ENGINEERING APPLICATIONS
(2017)