Study on fluid mechanics and Effective Stress Law of Fracture Intersection
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Wen Xiaoqi is a bit strangeEditor | Xiaoqi is a bit strangeBefore reading this article, we sincerely invite you to click on itFollow, which not only facilitates your discussion and sharing, but also brings you a different sense of participation. Thank you for your supportprefaceThrough brittle crustFluid flowMainly affected byFracture network is fluid transportstayIntersection of cracksstayFluid flowpermeability The degree of enhancement has not been quantified yet
Wen Xiaoqi is a bit strange
Editor | Xiaoqi is a bit strange
Before reading this article, we sincerely invite you to click on itFollow, which not only facilitates your discussion and sharing, but also brings you a different sense of participation. Thank you for your support
preface
Through brittle crustFluid flowMainly affected byFracture network is fluid transportstayIntersection of cracksstayFluid flowpermeability The degree of enhancement has not been quantified yet.
Fluid is mainly transported within the shallow crust through a network of interconnected cracks. Many practical applications require accurate prediction through crack networksFluid flow rateAnd direction. Although the hydraulic characteristics of individual cracks and their behavior with increasing depth have been extensively studied, the transmission characteristics of intersections between cracks have not yet been quantified.
Low porosity rock-Fluid flowstayand
stayCrack control systemstayandandstay
stayFault intersection pointIt has been recognized as an efficient, long-term, and concentrated fluid pipeline for the formation of mineral deposits, as well as the location of geothermal reservoirs andHydrocarbon leakageAlthoughIntersection of cracksstayand
andFluid flow rateFluid flowCoupled fluid mechanicsQualitative understanding of behavior.
andFluid flowThe relationship between hydraulic and mechanical properties of rock fracturesGap spaceandFluid flow
Fluid flowEffective stressstayandCombinations that produce the same material characteristics of interestRegardless of the individual's impactpcandppThe size of.
andIntersection of cracksandstayLow porosity crystalline rockThe composite intersection point is generated between two orthogonal tensile cracks generated using Brazilian testing technology.permeability pcpp,stayandpermeability
permeability Macroscopic crackandIntersection of cracksESLpermeability permeability
stayStatic pressure permeameterSeason the cracks in the middle. Subjecting rock fractures to multiple cycles of pressure and pressure reduction to minimizeInelastic hysteresis effect-Unloading cycle10MPa1090MPastay10MPa
staystay5MPastaypermeability Brazilian testing equipment
Intersecting crackpermeability
permeability
The penetrometer consists of a steel pressure vessel, whereRubber jacketRock samples can withstand a hydrostatic pressure of up to 200MPa, which is pumped into the container through a compressed air systemSilicone oil drivestay70MPa
The stress history dependence detected in the experiment indicates that the first loading cycle overestimatedpermeability andandpermeability Fluid flow
staypermeability staystaystaypermeability
andMechanical behaviorandFluid flowGap spaceandMechanical deformationand
stayFluid flow
Macroscopic crackpermeability staypermeability Intersecting cavityCompliance is lower thanMacroscopic crackFluid flowand
andIntersecting crackpermeability . Macroscopic crackandpermeability staystaypermeability
Interestingly, based on what we are considering herepermeability Macroscopic crackstaypermeability stay. Macroscopic crackpermeability
SBpermeability ,stay,Macroscopic crackpermeability Macroscopic crack,40MPa
Seljadalurpermeability Macroscopic crackMacroscopic crackandstay
permeability andFluid flow
Fluid flowFluid flowBorehole datasetIn order to predict the configuration of crack networks at specific depths.
ESLDefinedandCombination, regardless of PCandppEffective stress
Because what we're dealing with isIsotropic stressTherefore, for stress states that generate the same volume of fluid channels, it can be considered that the flow velocity is equal. This assumption allows us to believe thatpermeability ESLpermeability The analysis expression has been previously derived.
stayIntersecting cavityMacroscopic crackESCIntersecting crackIntersecting cavityThe fracture range is 0-84 to 1, with an average value of 0.91, whileThe intersection range is 0.77 to 0.86, with an average value of 0.81.
permeability ESLTerzaghiESL pe=pcppDifferent from many practical applications, any situation where the periodic variation of pore pressure is altered by injecting fluid into the reservoir.
conclusion
stayandpermeability stayIntersecting crackstayandIntersection of crackspermeability
staypermeability -Unloading cyclepermeability andandstayandpermeability
Circulating hydrostatic pressureandstayandandFracture roughness indexBut it will change
staySBTensile crackpermeability permeability permeability Hypothetical Cross Systempermeability
reference
[1] Application Analysis and Development Prospects of Pneumatic Conveying [J]. Wang Yanli. Shandong Chemical Industry, 2017 (07)
[2] Flow characteristics of particle clusters in gas-solid fluidized beds [J]. Huang Yahang; Liu Mengxi; Hu Juan. Journal of Process Engineering, 2016 (03)
[3] Analysis of icing growth process of different types of insulators based on fluid mechanics [J]. Zhang Zhijin; Yellow Sea Boat; Jiang Xingliang; Hu Jianlin; Sun Caixin. Journal of Electrical Technology, 2012 (10)
[4] Research progress in simulation of migration and distribution of hydraulic fracturing proppants [J]. Pan Linhua; Wang Haibo; He Jiayuan; Li Fengxia; Zhou Tong; Bruce Lee. Natural gas industry, 2020 (10)
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