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Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 937-947 doi: 10.1007/s11709-021-0754-4

Abstract: First, an analytical solution for fracturing pressure in two different concentric regions of soil wasThen, several triaxial hydraulic fracturing tests were carried out to validate the analytical solutionFirst, there is a linear relationship between the fracturing pressure and confining pressure in concentricthe internal-layer soil is softer than the external-layer soil, the presence of internal soil on the fracturingMoreover, the influence of strength distinction between the two layers on the fracturing pressure is

Keywords： hydraulic fracturing pressure layered cavity expansion theory triaxial fracturing test cohesive soil

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Experimental study on slurry-induced fracturing during shield tunneling

Teng WANG, Dajun YUAN, Dalong JIN, Xinggao LI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2, Pages 333-345 doi: 10.1007/s11709-021-0718-8

Abstract: Hydraulic fracturing may occur and cause a significant decrease in the support pressure if the slurryPreventing the occurrence of hydraulic fracturing in a slurry shield requires investigating the effectsof related influencing factors on the hydraulic fracturing pressure and fracture pattern.In this study, a hydraulic fracturing apparatus was developed to test the slurry-induced fracturing ofThe unconfined compressive strength of soil can reflect its ability to resist fracturing failure.

Keywords： slurry shield tunneling hydraulic fracturing test fracturing pressure fracture dip unconfined compressive

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Application of artificial fracturing for low permeable reservoir in Xianhe region

Xiao Shuming,Lv Zhiqiang,Guo Zhihua,Liu Xueqing

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 65-69

Abstract: the characteristics of low permeability and small porosity of high pressure low permeable reservoir, fracturingSince 2008, 79 fracturing mapping have been performed successfully in Xianhe region, which offers great

Keywords： fracturing mapping low permeability hydraulic fracturing

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Long-term behavior and safety assessment of Sance Rockfill Dam

Marta DOLEZALOVA, Ivo HLADIK

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 79-89 doi: 10.1007/s11709-010-0010-9

Abstract: assessment of the dam including slope stability analysis and estimation of the clay core cracking and hydraulicfracturing hazard.

Keywords： rockfill dam path dependence creep calibration cracking hydraulic fracturing hazard

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Stress distribution in third subsidence belt

Yan Zhitao,Liu Jianzhong,Qiu Jinping,Jin Lihua

Strategic Study of CAE 2009, Volume 11, Issue 2, Pages 33-35

Abstract: justify;">Stress distribution in the third subsidence belt is presented , with great amounts of data on hydraulicfracture orientation obtained from monitoring hydraulic fracturing , and the direction of the maximum

Keywords： hydraulic fracturing monitoring with micro- seismics third subsidence belt direction of maximumprinciplestress hydraulic fracturing treatment

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Application of hydraulic fracturing techniques for CBM wells in Qinshui coal field

ou Jinglong,Liu Zhidong,Li Jianzhong

Strategic Study of CAE 2011, Volume 13, Issue 1, Pages 89-92

Abstract: "text-align: justify;">According to the CBM(coal bed methane) features and possible difficulties in fracturingtechniques, a new hydraulic fracturing method with casing injection, high output and activated water

Keywords： CBM(coal bed methane) natural joint adsorption hydraulic fracturing

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Horizontal effects in fracturing operation of coal bed methane in Qinshui,Shanxi Province

Li Mengxi,Zhang Cong

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 16-19

Abstract:

This paper describes horizontal effects of CBM (coal bed methane)fracturingfractures have adverse effects, including reduced production flow rate, depletion, and watering during fracturingThis discovery shows that the horizontal compression of fracturing could have adverse impact on productionof adjacent wells, and fracturing designer should be aware of it.

Keywords： coal bed methane fracture hydraulic fracturing

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Microseismic monitoring technology

Tang Chunhua,Gu Guangqing

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 95-99

Abstract:

Microseismic (MS) monitoring is a hot topic in the applied geophysics recently. The MS mechanism and histories are introduced firstly in this article, and then the instruction of the MS equipment such as acquisition strategies, optimal sensors, array design, digital-signal processing, event location, velocity calibration, and monitoring deployment, is discussed. MS is a great technology with a long future, and we need to foster the understanding and acceptance of this technology.

Keywords： microseismic monitoring hydraulic fracturing oil and natural gas SNR (signal to noise ratio) event

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Interactions between the Design and Operation of Shale Gas Networks, Including CO₂ Sequestration

Sharifzadeh Mahdi,Xingzhi Wang,Nilay Shah

Engineering 2017, Volume 3, Issue 2, Pages 244-256 doi: 10.1016/J.ENG.2017.02.007

Abstract: the ultra-low permeability of shale gas reservoirs, special procedures such as horizontal drilling, hydraulicfracturing, periodic well shut-in, and carbon dioxide (CO₂) injection may be required inhighest shale gas production may not necessarily be the most profitable design; and that drilling, fracturing

Keywords： Shale gas Hydraulic fracturing Scheduling Well shut-in CO₂ sequestration Simultaneous optimization

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Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0706-2

Abstract: consumption, execution time, and excavation volume as the objective functions is presented for the electro-hydraulic

Keywords： trajectory planning electro-hydraulic shovel cubic polynomial S-curve multiobjective optimization

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Microseismic fracturing mapping and fracturing of open-hole long horizontal Well Su 75-70-6H

Wang Wanxun,Ye Lianchi,Wang Lizhi,Duan Zhengzhong

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 4-7

Abstract:

Well Su 75-70-6H is the largest open hole horizontal well fracturingwhether fractures are generated, locations and patterns of fractures, and further provides a guide for fracturingoperations; monitoring can also identify location of possible fracturing fluid leakage, provide earlyIt proves that domestic manufactured fracturing downhole tools can be used.The result of microseismic

Keywords： fracturing microseismic monitoring fracture

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Monitoring and Analyzing on Fracturing Fracture from Horizontal Well

Liu Jianzhong,Zhang Chuanxu,Zhao Yanbo,Jiang Yushuang,Song Jianxing

Strategic Study of CAE 2008, Volume 10, Issue 4, Pages 60-64

Abstract: The microseism monitoring of man-made fracture can understand the shape and orientation of fracturing

Keywords： horizontal well fracturing fracture microseism monitor

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Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic

Wenchi GONG, Jun SHEN, Wei DAI, Zeng DENG, Xueqiang DONG, Maoqiong GONG

Frontiers in Energy 2020, Volume 14, Issue 1, Pages 127-138 doi: 10.1007/s11708-020-0661-8

Abstract: This paper investigated effects of slip length and hydraulic diameter on the hydraulic entrance lengthIt is found that superhydrophobic microchannels have a longer hydraulic entrance length than that ofThe dimensionless hydraulic entrance length slightly increases with the increasing slip length at approximatelyRe<10, and does not vary with the hydraulic diameter.

Keywords： laminar flow hydraulic entrance length super hydrophobic surface slip length hydraulic diameter

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Modelling the thresholds of nitrogen/phosphorus concentration and hydraulic retention time for bloom

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 10, doi: 10.1007/s11783-022-1564-1

Abstract:

● A new model for bloom control in open land scape water was constructed.

Keywords： Reclaimed water landscape Algal bloom Nitrogen and phosphorus Hydraulic retention time Threshold

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Hydromechanical model for hydraulic fractures using XFEM

Bo HE

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 240-249 doi: 10.1007/s11709-018-0490-6

Abstract: In this study, a hydromechanical model for fluid flow in fractured porous media is presented. We assume viscous fluids and the coupling equations are derived from the mass and momentum balance equations for saturated porous media. The fluid flow through discrete cracks will be modelled by the extended finite element method and an implicit time integration scheme. We also present a consistent linearization of the underlying non-linear discrete equations. They are solved by the Newton-Raphson iteration procedure in combination with a line search. Furthermore, the model is extended to includes crack propagation. Finally, examples are presented to demonstrate the versatility and efficiency of this two-scale hydromechanical model. The results suggest that the presence of the fracture in a deforming, porous media has great impact on the fluid flow and deformation patterns.

Keywords： multi-phase medium porous fracture multi-scale method