Yiyu Lu
Chongqing University
Coal miningUltimate tensile strengthSupercritical fluidGeologySupercritical carbon dioxideBoreholeOil shaleComposite materialPermeability (earth sciences)Geotechnical engineeringMaterials scienceDrillingCoalbed methaneHydraulic fracturingChemical engineeringFracture (geology)MethaneCoalMechanicsPetroleum engineeringStress (mechanics)
97Publications
21H-index
1,305Citations
Publications 88
Newest
#1Zhaolong Ge (Chongqing University)H-Index: 15
#2Shirong Cao (Chongqing University)H-Index: 1
Last. Feifei Gao (Chongqing University)
view all 0 authors...
Abstract null null Coalbed methane (CBM) recovery using water jet drilling is regarded as a promising technology for high-efficiency, heat-free, and environmentally-friendly development of deep resources. An investigation of the fracture mechanism of coal subjected to a water jet under triaxial stress is essential for the future application of this technology in a deep environment. In this study, the fracture mechanism was discussed, and laboratory experiments were conducted on coal breaking wit...
Source
#1Praveen Linga (NUS: National University of Singapore)H-Index: 1
#2Guang-Jin Chen (China University of Petroleum)H-Index: 52
Last. Suping Peng (CUMT: China University of Mining and Technology)
view all 0 authors...
Source
#1Yiyu Lu (Chongqing University)H-Index: 21
#2Hanbo Zhang (Chongqing University)H-Index: 1
Last. M. L. Ye (Chongqing University)H-Index: 1
view all 7 authors...
1 CitationsSource
#1Yiyu Lu (Chongqing University)H-Index: 21
#2Rongrong Tian (Chongqing University)
Last. Xiao Sun
view all 7 authors...
Abstract Supercritical carbon dioxide (Sc-CO2) has been used in shale gas exploitation for efficient fracturing and the added benefit of CO2 geo-storage. Many studies have suggested that the water wettability of shale significantly influences the success of shale gas recovery. The aim of this work was to investigate the effect of CO2 treatment on shale water wettability. X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) were ...
Source
#1Wenchuan Liu (Chongqing University)
#2Yiyu Lu (Chongqing University)H-Index: 21
Last. Chia-Fon Lee (UIUC: University of Illinois at Urbana–Champaign)H-Index: 43
view all 5 authors...
Abstract In gasoline direct injection (GDI) engines, plume-plume interaction usually occurs when the superheated fluid discharges from multi-hole injectors. To mitigate plume interaction for further utilizing the merits of flash-boiling phenomena, it is essential to obtain the criteria of plume interaction and their effects on flashing spray characteristics. An 8-hole injector from Engine Combustion Network (ECN) is used to obtain the plume interaction criteria. Iso-octane, pentane, hexane, and ...
Source
#1Xi-Yue LiH-Index: 1
#2Bin-Bin GeH-Index: 2
view all 7 authors...
The consumption of natural gas is of great importance to optimize China’s energy structure toward reduced CO2 emissions and is projected to increase in the next 10 years. Coalbed methane (CBM) is a...
Source
#1Yiyu Lu (Chongqing University)H-Index: 21
#2Zijie Xu (Chongqing University)H-Index: 1
Last. Xiayu Chen (Chongqing University)H-Index: 1
view all 5 authors...
Abstract To investigate the mechanism of super-critical CO2 saturation on the tensile properties of shale, shale specimens were saturated with Sc-CO2, and inert gas (Ar) was employed as control group. Brazilian splitting experiment with different layering inclinations (0°, 30°, 60°, 90°) showed that after Sc-CO2 saturation, the Brazilian splitting strength (BSS) and Brazilian splitting modulus (E) of shale were decreased by 11.9% and 5.7%, respectively. Regardless of any direction of stress load...
1 CitationsSource
#1Jianyu Zhong (Chongqing University)H-Index: 2
#2Zhaolong Ge (Chongqing University)H-Index: 15
Last. Jingwei Zheng (Chongqing University)H-Index: 3
view all 5 authors...
Abstract: Hydraulic fracturing technology has been widely used as the main method of exploiting coalbed methane (CBM). The core of this technology is the accurate prediction of the fracture initiation pressure. As the exploitation depth increases, the influence of the in-situ stress obviously increases. Because the existing model of calculating the fracture initiation pressure ignores the influence of in-situ stress on the extraction borehole (CBM well) deformation, and the fracture initiation f...
Source
#1Yunzhong Jia (Uppsala University)H-Index: 2
#2Jiren Tang (Chongqing University)H-Index: 11
Last. Zhaohui Lu (Ontario Ministry of Natural Resources)H-Index: 2
view all 4 authors...
Seismic activities have been reported by the large-scale fluid injection in shale reservoirs both during hydraulic fracturing operations and wastewater disposal processes. Fluid overpressure has been regarded as the primary cause for the injection-induced seismicity since the fluid lubricates the fault and decreases the effective normal stress applied to the pre-existing faults. However, how fractures/faults slip after the activation remains unclear. The rate-and-state friction law has been wide...
1 CitationsSource
#1Yiyu Lu (Chongqing University)H-Index: 21
#2Jiankun Zhou (Chongqing University)H-Index: 1
Last. Xiang Ao (Chongqing University of Science and Technology)
view all 6 authors...
Abstract Using supercritical CO2 as fracturing medium to develop shale gas not only improve the stimulation effect of reservoir, but also reduce CO2 emissions. To optimise the flow of shale gas into a wellbore, it is important to understand the flow characteristics of gas in the shale fracture system after reservoir reconstruction. To date, no research has been conducted on the effect of supercritical CO2 on the flow characteristics of gas in shale fractures. Hence, in this study, experiments we...
Source