Why Mohr-circle analyses may underestimate the risk of fault reactivation in depleting reservoirs

Bogert, P.A.J. van den; Eijs, R.M.H.E. van

doi:10.1016/j.ijrmms.2020.104502

Cited by 11 publications

(2 citation statements)

References 22 publications

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“…The tested model of the pipe–soil system consists of 237,766 finite elements (75,599 for the pipe; 162,167 for the soil) and 377,615 nodes. The soil was modeled with the use of the elastic–ideally plastic Coulomb–Mohr model, which is one of the most frequently used models in soil numerical descriptions [ 24 , 25 , 26 , 27 ]. The elastoplastic models describe the state of deformation and soil load in the zones subject to the limit state.…”

Section: Methodsmentioning

confidence: 99%

Numerical–Experimental Analysis of Polyethylene Pipe Deformation at Different Load Values

et al. 2020

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Polymer pipes are used in the construction of underground gas, water, and sewage networks. During exploitation, various external forces work on the pipeline, which cause its deformation. In the paper, numerical analysis and experimental investigations of polyethylene pipe deformation at different external load values (500, 1000, 1500, and 2000 N) were performed. The authors measured strains of the lower and upper surface of the pipe during its loading moment using resistance strain gauges, which were located on the pipe at equal intervals. The results obtained from computer simulation and experimental studies were comparable. An innovative element of the research presented in the article is recognition of the impact of the proposed values of the load of polyethylene pipe on the change in its deformation.

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Section: Methodsmentioning

confidence: 99%

Numerical–Experimental Analysis of Polyethylene Pipe Deformation at Different Load Values

et al. 2020

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“…For example, fault systems can control the deformation of rock masses and affect the deformation response of underground excavations in soft rock [16]. Each fracture's structure, the magnitude of tectonic stress, and the proximity to fractures play a crucial role in disturbing the regional stress field and forming small-scale variations [17]. The stress state of the Earth's crust is related to the dynamic nature of faults [18], and different fault factors such as the fault activity distance, slip rate, friction coefficient, fault thickness, and fault dip angle significantly influence the distribution of the stress field [19].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Influence of Fault Structure on the Geostress Field

Zhu,

Huang,

et al. 2023

Sustainability

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A geostress field continuously evolves with long-term tectonic activity. A fault, as a general product of tectonic movements, has a great influence on the geostress field in the vicinity. To analyze the geostress field characteristics and influencing factors near the fault fracture zone in high-altitude areas, this study takes the Dianda-Piru fault on the Qinghai–Tibet Plateau as its research object. Based on the geological conditions and in situ stress measurement data in the study area, a refined numerical model was established using numerical simulation to invert the geostress field in the vicinity of the fault fracture zone, and a quantitative analysis of the factors influencing the geostress distribution was carried out. The results show that the overall relationship between large horizontal principal stress σH, vertical stress σv, and small horizontal principal stress σh is σH > σv > σh, and the surrounding rock stress is dominated by horizontal stress. Geostress is released within the fault fracture zone to a certain extent, and there is a certain degree of stress concentration within the intact rock mass on the upper plate of the fault. The elastic modulus has a greater influence on the geostress field near the fracture structure area than Poisson’s ratio, and the range of the stress-weakening zone increases with the decrease in the elastic modulus. The maximum principal stress inside the fault increases with the increase in the angle between the fault strike and regional principal stress, while the deflection angle of the surrounding principal stress direction decreases with the increase in this angle. The study of the distribution law of geostress fields with developed fracture structures can provide theoretical guidance for the sustainable development of engineering construction in tectonically active areas.

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Influence of complicated faults on the differentiation and accumulation of in-situ stress in deep rock mass

Tan

Yang

Tan

2023

Int J Miner Metall Mater

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Why Mohr-circle analyses may underestimate the risk of fault reactivation in depleting reservoirs

Cited by 11 publications

References 22 publications

Numerical–Experimental Analysis of Polyethylene Pipe Deformation at Different Load Values

Numerical–Experimental Analysis of Polyethylene Pipe Deformation at Different Load Values

Numerical Study on the Influence of Fault Structure on the Geostress Field

Influence of complicated faults on the differentiation and accumulation of in-situ stress in deep rock mass

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