Advances in mathematical modeling of hydraulic stimulation of a subterranean fractured reservoir

2005 ◽  
Author(s):  
Sergei Fomin ◽  
Toshiyuki Hashida
Keyword(s):  
Mathematical Modeling ◽  
Fractured Reservoir ◽  
Hydraulic Stimulation ◽  
Stimulation Of

Hydraulic stimulation of geothermal wells

2011 ◽  
pp. 1309-1314 ◽  
Author(s):  
S Gentier ◽  
X Rachez ◽  
M Peter-Borie ◽  
A Blaisonneau
Keyword(s):  
Hydraulic Stimulation ◽  
Geothermal Wells ◽  
Stimulation Of

Mathematical modeling method of cell tension and compression based on multi-modal mechanical signals

2020 ◽  
pp. 1-10
Author(s):  
Dongyang Pan ◽  
Jingrui Liu
Keyword(s):  
Mathematical Modeling ◽  
Stem Cells ◽  
Elastic Modulus ◽  
Human Health ◽  
Mechanical Stimulation ◽  
Cell Morphology ◽  
Cell Mechanics ◽  
Modeling Method ◽  
Mechanical Signals ◽  
Stimulation Of

Mechanical biology is the study of the influence of the mechanical environment on human health, disease, or injury. To study the mechanism of the organism’s perception and response to mechanical signals can promote the development of biomedical basic and clinical research, and promote human health. The purpose of this paper is to study the mathematical modeling method of the effect of multimodal mechanical signals on cell stretching and compression. This article first established a cell mechanics model based on the generalization of membrane theory, introduced the micro-manipulation techniques used to characterize cell mechanics and the method of cell mechanics loading, and then explained why mathematical modeling was established. Finally, according to the multi-modality During the mechanical preparation process, the effects of multi-modal mechanical signals on the stretching and compression of annulus fibrosus stem cells were studied. The experimental results in this paper show that after planting fibrous stem cells with different elastic modulus, the cell proliferation is obvious after the tensile mechanical stimulation of different conditions, and the different elastic modulus scaffolds are stimulated by the tensile mechanical stimulation of 2% tensile amplitude. The cell morphology is different. The low elastic modulus is round-like, and the high elastic modulus is fusiform-like. After 5% and 12% stretch amplitude, the cells are oriented at different elastic modulus. Arranged, there is no obvious difference in cell morphology.

Kinematic dilation during the hydraulic stimulation of pre-fractured rocks

2019 ◽  
Vol 9 (3) ◽  
pp. 186-192 ◽  
Author(s):  
S. Roshankhah ◽  
L. G. Cruz ◽  
H. Shin ◽  
A. Lizcano ◽  
J. C. Santamarina
Keyword(s):  
Fractured Rocks ◽  
Hydraulic Stimulation ◽  
Stimulation Of

Long-period long-duration seismic events during hydraulic stimulation of shale and tight-gas reservoirs — Part 2: Location and mechanisms

Geophysics ◽  
2013 ◽  
Vol 78 (6) ◽  
pp. KS109-KS117 ◽  
Author(s):  
Indrajit Das ◽  
Mark D. Zoback
Keyword(s):  
Fluid Pressure ◽  
Seismic Events ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Data Set ◽  
Hydraulic Stimulation ◽  
Tight Gas Reservoirs ◽  
Long Period ◽  
Long Duration ◽  
Stimulation Of

Long-period long-duration (LPLD) seismic events that have been observed during hydraulic stimulation of shale-gas and tight-gas reservoirs appear to represent slow shear slip on relatively large faults. Within the limitations of the recording geometry, we determine the areas in the reservoirs where the events are located in two case studies in the Barnett shale. In one data set, LPLD events appear to occur in the region where the density of natural fractures as well as the fluid pressure during pumping were highest. In the other data set, the LPLD events are observed to occur between two wells and seem to establish a hydraulic connection between them. In both data sets, the LPLD events occur in areas with very few located microearthquakes. A combination of factors such as high fluid pressure and/or high clay content is potentially responsible for the slowly slipping faults. The LPLD events appear to be occurring only on faults large enough to produce a sequence of slow slip events. We suggest that these slowly slipping faults contribute appreciably to the stimulation of these extremely low-permeability reservoirs and hence mapping the distribution of faults and fractures and areas with rock properties that favor slow, sustained slip, can help in optimizing production.

scholarly journals Meter-scale stress heterogeneities and stress redistribution drive complex fracture slip and fracture growth during a hydraulic stimulation experiment

2021 ◽  
Author(s):  
Linus Villiger ◽  
Valentin Samuel Gischig ◽  
Grzegorz Kwiatek ◽  
Hannes Krietsch ◽  
Joseph Doetsch ◽  
...  
Keyword(s):  
Shear Zone ◽  
Induced Seismicity ◽  
Damage Zone ◽  
Test Site ◽  
Crystalline Rock ◽  
Stress Redistribution ◽  
Small Scale ◽  
Hydraulic Stimulation ◽  
Source Mechanisms ◽  
Stimulation Of

Summary We investigated the induced seismicity, source mechanisms and mechanical responses of a decameter-scale hydraulic stimulation of a pre-existing shear zone in crystalline rock, at the Grimsel Test Site, Switzerland. The analysis reveals the meter-scale complexity of hydraulic stimulation, which remains hidden at the reservoir-scale. High earthquake location accuracy allowed the separation of four distinct clusters, of which three were attributed to the stimulation of fractures in the damage zone of the shear zone. The source mechanism of the larger-magnitude seismicity varied by cluster, and suggests a heterogeneous stress field already prevailing before stimulation, which is further modified during stimulation. In the course of the experiment, stress redistribution led to the aseismic initiation of a tensile-dominated fracture, which induced seismicity in the fourth of the identified seismic clusters. The streaky pattern of seismicity separated by zones without seismicity suggests fluid flow in conduits along existing fracture planes. The observed sub-meter scale complexity questions the forecasting ability of induced seismic hazard at the reservoir scale from small-scale experiments.

scholarly journals Fault slip in hydraulic stimulation of geothermal reservoirs: Governing mechanisms and process-structure interaction

2020 ◽  
Vol 39 (12) ◽  
pp. 893-900
Author(s):  
Inga Berre ◽  
Ivar Stefansson ◽  
Eirik Keilegavlen
Keyword(s):  
Fault Reactivation ◽  
Fluid Injection ◽  
Hydraulic Stimulation ◽  
Structure Interaction ◽  
Geothermal Reservoirs ◽  
Biot Coefficient ◽  
Matrix Permeability ◽  
Stress Changes ◽  
Process Structure ◽  
Stimulation Of

Hydraulic stimulation of geothermal reservoirs in low-permeability basement and crystalline igneous rock can enhance permeability by reactivation and shear dilation of existing fractures. The process is characterized by interaction between fluid flow, deformation, and the fractured structure of the formation. The flow is highly affected by the fracture network, which in turn is deformed because of hydromechanical stress changes caused by the fluid injection. This process-structure interaction is decisive for the outcome of hydraulic stimulation, and, in analysis of governing mechanisms, physics-based modeling has potential to complement field and experimental data. Here, we show how recently developed simulation technology is a valuable tool to understand governing mechanisms of hydromechanical coupled processes and the reactivation and deformation of faults. The methodology fully couples flow in faults and matrix with poroelastic matrix deformation and a contact mechanics model for the faults, including dilation because of slip. Key elements are high aspect ratios of faults and strong nonlinearities in highly coupled governing equations. Example simulations using our open-source software illustrate direct and indirect hydraulic fault reactivation and corresponding permeability enhancement. We investigate the effect of the fault and matrix permeability and the Biot coefficient. A higher matrix permeability leads to more leakage from a permeable fault and thus suppresses reactivation and slip of the fault compared to the case with a lower matrix permeability. If a fault is a barrier to flow, increase of pressure because of the fluid injection results in stabilization of the fault; the situation is opposite if the fault is highly permeable compared to the matrix. For the given setup, lowering the Biot coefficient results in more slip than the base case. While conceptually simple, the examples illustrate the strong hydromechanical couplings and the prospects of physics-based numerical models in investigating the dynamics.

scholarly journals Rapid water-rock interactions evidenced by hydrochemical evolution of flowback fluid during hydraulic stimulation of a deep geothermal borehole in granodiorite: Pohang, Korea

2019 ◽  
Vol 111 ◽  
pp. 104445
Author(s):  
Neil M. Burnside ◽  
Rob Westaway ◽  
David Banks ◽  
Günter Zimmermann ◽  
Hannes Hofmann ◽  
...  
Keyword(s):  
Hydrochemical Evolution ◽  
Hydraulic Stimulation ◽  
Stimulation Of

scholarly journals Hydromechanical analyses of the hydraulic stimulation of borehole Basel 1

2011 ◽  
Vol 185 (3) ◽  
pp. 1266-1287 ◽  
Author(s):  
Adrián E. Ortiz R. ◽  
Jörg Renner ◽  
Reinhard Jung
Keyword(s):  
Hydraulic Stimulation ◽  
Stimulation Of
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