Journal articles on the topic 'Geomechanical restoration'
To see the other types of publications on this topic, follow the link: Geomechanical restoration.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 28 journal articles for your research on the topic 'Geomechanical restoration.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Crook, Anthony J. L., Joshua Obradors-Prats, Deniz Somer, Djordje Peric, Pete Lovely, and Marek Kacewicz. "Towards an integrated restoration/forward geomechanical modelling workflow for basin evolution prediction." Oil & Gas Sciences and Technology – Revue d’IFP Energies nouvelles 73 (2018): 18. http://dx.doi.org/10.2516/ogst/2018018.
Abstract:
Many sedimentary basins host important reserves of exploitable energy resources. Understanding of the present-day state of stresses, porosity, overpressure and geometric configuration is essential in order to minimize production costs and enhance safety in operations. The data that can be measured from the field is, however, limited and at a non-optimal resolution. Structural restoration (inverse modelling of past deformation) is often used to validate structural interpretations from seismic data. In addition, it provides the undeformed state of the basin, which is a pre-requisite to understanding fluid migration or to perform forward simulations. Here, we present a workflow that integrates geomechanical-based structural restoration and forward geomechanical modelling in a finite element framework. The geometry and the boundary kinematics derived from restoration are used to automatically create a forward geomechanical model. Iterative correction may then be performed by either modifying the assumptions of the restoration or modifying the restoration-derived boundary conditions in the forward model. The methodology is applied to two problems; firstly, a sand-box scale benchmark model consisting of sand sediments sliding on silicon leading to the formation of a graben structure; secondly, a field-scale thrust-related anticline from Niger Delta. Two strategies to provide further constraint on fault development in the restoration-derived forward simulation are also presented. It is shown that the workflow reproduces the first order structural features observed in the target geometry. Furthermore, it is demonstrated that the iterative approach provides improved understanding of the evolution and additional information of current-day stress and material state for the Niger Delta Case.
2
MacDonald, Justin, Guillaume Backé, Rosalind King, and Richard Hillis. "The Hammerhead Delta—deepwater fold-thrust belt, Bight Basin, Australia: 2D kinematic and geomechanical reconstructions." APPEA Journal 51, no. 2 (2011): 739. http://dx.doi.org/10.1071/aj10119.
Abstract:
The Hammerhead Delta—deepwater fold-thrust belt is located in the Ceduna Sub-basin of the Bight Basin, offshore southern Australia. It is a short lived gravity gliding system, Late Santonian-Maastrichtian in age. It exhibits a distinctive spoon shape in cross-section and detaches on a master horizon above Santonian marine shales of the Tiger Supersequence. Here, we have interpreted a large seismic dataset—including the recently acquired regional two-dimensional seismic dataset provided by Ion Geophysical—to constrain the regional structural geometry of the Hammerhead Delta—deepwater fold-thrust belt. Two structural restorations were completed to quantify the amount of extension and shortening in the system. These restorations were: a two-dimensional kinematic restoration, using 2D MOVE; and a two-dimensional geomechanical restoration, using Dynel 2D. By comparing results from the two techniques we demonstrate that the amount of observed extension in the delta top is nearly balanced by the shortening in the delta toe. The near balance (< 2 % excess extension) of the system is a unique result. Other passive margin systems demonstrate larger amounts of extension compared to shortening, due to the regional-scale pro-gradational nature of the systems. These results suggest that the balanced geometry of the Hammerhead Delta—deepwater fold-thrust belt is consistent with either a sudden decrease in sediment supply during the upper Maastrichtian, resulting in a cessation of prograding fault activity, or a loss of extension to the underlying Cenomanian growth faults or some combination thereof. Thus, the system failed to develop into an extensive passive margin delta—deepwater fold-thrust belt.
3
Shiri, Yousef, and Alireza Shiri. "DISCRETE FRACTURE NETWORK (DFN) MODELLING OF FRACTURED RESERVOIR BASED ON GEOMECHANICAL RESTORATION, A CASE STUDY IN THE SOUTH OF IRAN." Rudarsko-geološko-naftni zbornik 36, no. 4 (2021): 151–62. http://dx.doi.org/10.17794/rgn.2021.4.12.
Abstract:
Fractured reservoirs have always been of interest to many researchers because of their complexities and importance in the oil industry. The purpose of the current study is to model the fractured reservoir based on geomechanical restoration. Our target is the Arab Formation reservoir which is composed of seven limestone and dolomite layers, separated by thin anhydrite evaporate rock. First of all, in addition to the intensity, the dip, and the azimuth of the fractures, the magnitude and the direction of the stresses are determined using wireline data e.g. photoelectric absorption factor (PEF), sonic density, neutron porosity, a dipole shear sonic imager (DSI), a formation micro imager (FMI), and a modular formation dynamics tester (MDT). Then, the seismic data are interpreted and the appropriate seismic attributes are selected. One of our extracted attributes was the ant tracking attribute which is used for identifying large-scale fractures. Using this data, fractures and faults can be identified in the areas away from wells in different scales. Subsequently, the initial model of the reservoir is reconstructed. After that, the stress field and the distribution of fractures are obtained using the relationship between the stresses, the strains, and the elastic properties of the existing rocks. The model is finely approved using the azimuth and the intensity of fractures in the test well. Our findings showed that the discrete fracture network (DFN) model using geomechanical restoration was positively correlated with real reservoir conditions. Also, the spatial distribution of fractures was improved in comparison to the deterministic-stochastic DFN.
4
Schuh-Senlis, Melchior, Cedric Thieulot, Paul Cupillard, and Guillaume Caumon. "Towards the application of Stokes flow equations to structural restoration simulations." Solid Earth 11, no. 5 (October 22, 2020): 1909–30. http://dx.doi.org/10.5194/se-11-1909-2020.
Abstract:
Abstract. Structural restoration is commonly used to assess the deformation of geological structures and to reconstruct past basin geometries. For this, geomechanical restoration considers faults as frictionless contact surfaces. To bring more physical behavior and better handle large deformations, we build on a reverse-time Stokes-based method, previously applied to restore salt structures with negative time step advection. We test the applicability of the method to structures including sediments of variable viscosity, faults and non-flat topography. We present a simulation code that uses a combination of arbitrary Lagrangian–Eulerian methods and particle-in-cell methods, and is coupled with adaptive mesh refinement. It is used to apply the reverse-time Stokes-based method on simple two-dimensional geological cross-sections and shows that reasonable restored geometries can be obtained.
5
Nyantakyi, E. K., Li Tao, Hu Wangshui, and J. K. Borkloe. "The role of geomechanical-based structural restoration in reservoir analysis of deepwater Niger Delta, Nigeria." Acta Geodaetica et Geophysica 49, no. 4 (October 18, 2014): 415–29. http://dx.doi.org/10.1007/s40328-014-0072-6.
6
Dubey, Prashant K., Sushil Kumar, Khushboo Havelia, and Savitri Yadav. "Integrated deterministic and predictive discrete fracture network modeling for an Eocene carbonate reservoir, Bengal Basin, India." Leading Edge 38, no. 4 (April 2019): 274–79. http://dx.doi.org/10.1190/tle38040274.1.
Abstract:
Prediction of fracture porosity and permeability remains a challenge for fractured carbonate reservoirs. As natural fractures are heterogeneous and subseismic in scale, core data and image logs only provide partially sampled data, leading to sparse information on fracture length, height, orientation, spacing, and aperture. In the present study, an integrated discrete fracture network was generated that is capable of predicting fracture porosity in Eocene carbonates of the Bengal Basin in northeastern India. The predictive fracture modeling method used 3D kinematic and geomechanical restoration of interpreted seismic horizons to estimate infinitesimal stress and strain values and to characterize associated fracture sets. Seismic attribute analysis was used to extract faults and fractures from an ant-track cube, which provided sharper definition of discontinuities seen in conventional curvature attribute data. An integrated discrete fracture model was created using information from seismic attributes, seismic inversion, and strain distribution to determine fracture intensity. Faults and fractures that are seismically resolved were statistically analyzed, which indicated that spatial distribution of fracture length follows a power law. Based on theoretical concepts of fracture mechanics, linear aperture-to-length scaling was used to characterize aperture population. A present-day geomechanical earth model was used to identify open fracture sets. This model shows that northeast–southwest-oriented fracture sets are critically stressed and will contribute to porosity and permeability. Criticality of fractures to shear failure was analyzed by computing geomechanical parameters — slip stability and dilation tendency, based on the direction and magnitude of far-field stresses. Fractures with slip and dilation tendencies greater than 0.6 in the modeled discrete fracture network were taken as inputs for porosity and permeability estimation.
7
Kim, Jongchan, Jong-Sub Lee, Cody Arnold, and Sang Yeob Kim. "Evaluation of Thawing and Stress Restoration Method for Artificial Frozen Sandy Soils Using Sensors." Sensors 21, no. 5 (March 9, 2021): 1916. http://dx.doi.org/10.3390/s21051916.
Abstract:
Undisturbed frozen samples can be efficiently obtained using the artificial ground freezing method. Thereafter, the restoration of in situ conditions, such as stress and density after thawing, is critical for laboratory testing. This study aims to experimentally explore the effects of thawing and the in situ stress restoration process on the geomechanical properties of sandy soils. Specimens were prepared at a relative density of 60% and frozen at −20 °C under the vertical stress of 100 kPa. After freezing, the specimens placed in the triaxial cell underwent thawing and consolidation phases with various drainage and confining stress conditions, followed by the shear phase. The elastic wave signals and axial deformation were measured during the entire protocol; the shear strength was evaluated from the triaxial compression test. Monotonic and cyclic simple shear tests were conducted to determine the packing density effect on liquefaction resistance. The results show that axial deformation, stiffness, and strength are minimized for a specimen undergoing drained thawing, restoring the initial stress during the consolidation phase, and that denser specimens are less susceptible to liquefaction. Results highlight that the thawing and stress restoration process should be considered to prevent the overestimation of stiffness, strength, and liquefaction resistance of sandy soils.
8
Stockmeyer, Joseph M., John H. Shaw, Lee T. Billingsley, Andreas Plesch, Michael Wales, Leore C. Lavin, Ray Knox, and Luke Finger. "Geomechanical restoration as a tool for fractured reservoir characterization: Application to the Permian Basin, west Texas." AAPG Bulletin 102, no. 01 (January 2018): 103–28. http://dx.doi.org/10.1306/03231716076.
9
Petlovanyi, Mykhailo, Kateryna Sai, and Dmytro Malashkevych. "Specifics and practical examples of low-hazard industrial waste utilization for filling technogenic cavities." InterConf, no. 37(171) (September 20, 2023): 314–22. http://dx.doi.org/10.51582/interconf.19-20.09.2023.026.
Abstract:
The presented research focuses on the pressing issues of restoration of land areas disturbed by mining operations. The paper studies legislative peculiarities of industrial waste utilization for the purpose of reclamation of disturbed lands in Ukraine. Real practical examples of using low-hazard industrial waste for reclamation of land areas disturbed by quarrying and failure zones are analyzed. It is noted that, provided that all legal and sanitary requirements are met, low-hazard class IV waste can be used at the mining-technical stage of quarry reclamation. Aspects of the prospects for restoring the earth’s surface level are clarified based on the development of directions for the backfill mass formation in technogenic cavities, which will provide stability and geomechanical reliability of the earth’s surface.
10
Wang, Lining. "Introduction of geomechanical restoration method and its implications for reservoir assessment of unconventional oil–gas resource in China." Chinese Journal of Population Resources and Environment 11, no. 4 (December 2013): 327–32. http://dx.doi.org/10.1080/10042857.2013.835538.
11
Gigli, G., W. Frodella, F. Mugnai, D. Tapete, F. Cigna, R. Fanti, E. Intrieri, and L. Lombardi. "Instability mechanisms affecting cultural heritage sites in the Maltese Archipelago." Natural Hazards and Earth System Sciences 12, no. 6 (June 14, 2012): 1883–903. http://dx.doi.org/10.5194/nhess-12-1883-2012.
Abstract:
Abstract. The superimposition of geological formations with marked contrast in geotechnical properties presents one of the most critical environments for slope instability due to the different response of the materials to the applied disturbances. Moreover, the above-mentioned geological setting is often associated with high risk conditions, since many isolated rock slabs located at a higher altitude than the surrounding countryside have been sites of historical towns or buildings. The purpose of the present paper is to investigate the mechanisms determining instability in rock slabs overlying a soft substratum, with reference to two cultural heritage sites in Malta. Accurate investigations have been carried out to evaluate the geological, geotechnical and geomechanical properties together with the main geomorphological features of the soft clayey substratum and the overlying limestone rock mass. The main instability processes have thus been identified and investigated through kinematic analyses and numerical modeling, combined with a 1992–2001 Persistent Scatterers monitoring of ground displacements. The study constitutes the basis for the subsequent restoration works.
12
Petlovanyi, Mykhailo V., Kateryna S. Sai, Vasyl V. Popovych, and Maksym O. Chebanov. "Methodological approach to determining promising “quarry cavities – backfill material” systems on the territory of Ukraine." Environmental safety and natural resources 48, no. 4 (December 26, 2023): 32–47. http://dx.doi.org/10.32347/2411-4049.2023.4.32-47.
Abstract:
The research is aimed at identifying promising “quarry cavities – backfill material” systems on the territory of Ukraine. Currently, the existing reclamation methods for quarry cavities do not provide for the earth’s surface level complete restoration. A number of industrial wastes, the accumulation of which is increasing rapidly, are potential backfill materials. An insufficiently studied and promising method for restoring the earth’s surface level is the formation of a backfill mass in quarry cavities, which can provide geomechanical stability. Nevertheless, in order to develop directions for backfilling, it is necessary to have information on the spatial distribution of quarry cavities and potential backfill materials on the territory of Ukraine, which is also insufficiently studied today. The paper forms and reveals a theoretical idea about the “quarry cavities – backfill material” systems. A number of important conditions for the harmonious existence and effective implementation of the specified promising systems are characterized. The methodology for creating the basis of an information-analytical map is presented, and the principles for determining and characterizing its main constituent elements are given. A new information-analytical map of the spatial location of potential backfill materials and formed quarry cavities on the territory of Ukraine has been created, on the basis of which possible “quarry cavities – backfill material” systems have been identified. It has been determined that today on the territory of Ukraine, for the earth’s surface level complete restoration, it is expedient to consider the formation of a backfill mass in quarry cavities in 12 districts, where there are promising “quarry cavities – backfill material” systems. The concept of a complete restoration development of the earth’s surface disturbed by mining operations in certain potential systems is possible under conditions of synergistic interaction between public authorities and private business. The practical result obtained is an important basis for creating an effective mechanism and effective measures for a complete restoration of the earth’s surface state, which will contribute to strengthening the international image of Ukraine as a responsible and environmentally conscious country.
13
Li, Yiquan, Dong Jia, Andreas Plesch, Judith Hubbard, John H. Shaw, and Maomao Wang. "3-D geomechanical restoration and paleomagnetic analysis of fault-related folds: An example from the Yanjinggou anticline, southern Sichuan Basin." Journal of Structural Geology 54 (September 2013): 199–214. http://dx.doi.org/10.1016/j.jsg.2013.06.009.
14
Durand-Riard, Pauline, John H. Shaw, Andreas Plesch, and Gbenga Lufadeju. "Enabling 3D geomechanical restoration of strike- and oblique-slip faults using geological constraints, with applications to the deep-water Niger Delta." Journal of Structural Geology 48 (March 2013): 33–44. http://dx.doi.org/10.1016/j.jsg.2012.12.009.
15
Maerten, Frantz, and Laurent Maerten. "On a method for reducing interpretation uncertainty of poorly imaged seismic horizons and faults using geomechanically based restoration technique." Interpretation 3, no. 4 (November 1, 2015): SAA105—SAA116. http://dx.doi.org/10.1190/int-2015-0009.1.
Abstract:
To reduce exploration risk and optimize production in structurally complex areas, the geologic interpretation must be based on sound geomechanical principles. Despite advances in 3D seismic acquisition and processing techniques as well as in the availability of computationally robust interpretation software, the challenge associated with interpreting complex structures from seismic reflection data is that highly deformed areas surrounding faults, folds, and salt surfaces are often poorly imaged and therefore their interpretation is highly uncertain. We have developed a methodology that should help geophysicists quickly check the strengths and weaknesses of their interpretation and to automatically reduce the uncertainty in a faulted horizon geometry. Our workflow consisted of restoring interpreted seismic horizons and relating the concentrations of computed deformation attributes to areas of interpretation uncertainty. We used the technique based on an iterative finite-element formulation that allowed unfolding and unfaulting of 3D horizons using physical elastic behavior. A fast algorithm has been developed to automatically correct the interpreted structures in zones that exhibited anomalous deformation concentrations after restoration. This approach is able to mechanically check and reduce uncertainty in a faulted seismic horizon interpretation. Its application to synthetic and reservoir data has a high degree of reliability in the characterization of structurally complex reservoirs. This technique is also applicable to 2D models (geologic cross sections) and 3D models (volume).
16
Vidal-Royo, Oskar, Nestor Cardozo, Josep Anton Muñoz, Stuart Hardy, and Laurent Maerten. "Multiple mechanisms driving detachment folding as deduced from 3D reconstruction and geomechanical restoration: the Pico del Águila anticline (External Sierras, Southern Pyrenees)." Basin Research 24, no. 3 (September 6, 2011): 295–313. http://dx.doi.org/10.1111/j.1365-2117.2011.00525.x.
17
Ortega Guerrero, Marcos Adrián. "Flujo de agua subterránea y transporte en medios geológicos fracturados: una revisión." Revista Mexicana de Ciencias Geológicas 41, no. 1 (March 26, 2024): 103–29. http://dx.doi.org/10.22201/cgeo.20072902e.2024.1.1772.
Abstract:
The groundwater flow and the transport of solutes and contaminants in fractured media play a very important role in various hydrogeological and geological processes. Fractures are discontinuities that occur in practically all types of rocks, consolidated and semi-consolidated sediments, in which it has interacted with the hydrological cycle at different scales of space and time. This article reviews 20 years of research in the CGEO of different selected examples in Mexico, from local to regional scales, associated with 1) Gravitational Groundwater Flow Systems, 2) The hydrogeochemical interaction of groundwater with fractured rocks through which it circulates, 3) Instrumentation and coupled numerical analysis of flow parameters and time-varying geomechanics, during consolidation associated with pumping, 4) Analysis of fracture generation with the development and application of coupled flow and geomechanical equations, 5) Formation of new minerals, 6) Sustenance of ecosystems, 7) Artificial fracturing of soils for their conservation and infiltration of rainwater improvement; and on the issue of transport in 8) Natural solute migration mechanisms, 9) Contaminants induced by pumping, 10) Spills of hydrocarbon derivatives in low permeability and double porosity media due to fracturing and 11) Heat. The results show the importance of fractured media in groundwater recharge in mountainous areas and flow towards granular media in quantity and quality, where residence times of a few years to thousands are involved, which implies modifying water and ecosystem management criteria, in the country; the complexity of these processes requires different methodologies for their evaluation, among them the instrumentation and calibration of numerical models from 1D to 3D for analysis, predictions and the proposal of restoration, sustainability and management solutions; they also help to prevent, control and mitigate the negative impacts on health and the environment caused by the induction of geogenic elements and by various types of pollutants; fractured media also support numerous terrestrial and marine ecosystems, and in the case of damaged agricultural soils, artificial fracturing allows increasing rainwater infiltration and improving productivity in adaptation to climate change and reducing the extraction in aquifers where safe capacity has been exceeded; unfortunately, excessive extraction in closed basins is causing fracturing of the aquitards, both hydraulic and due to differential settlement, which favors the migration of pore water rich in elements harmful to human health and the environment, whose natural function was its protection. All this requires designing mechanisms for the transfer of scientific knowledge to society and decision makers to propose novel restoration and sustainability strategies, under the new paradigm of Gravitational Groundwater Flow Systems.
18
Durand-Riard, Pauline, Chris Guzofski, Guillaume Caumon, and Marc-Olivier Titeux. "Handling natural complexity in three-dimensional geomechanical restoration, with application to the recent evolution of the outer fold and thrust belt, deep-water Niger Delta." AAPG Bulletin 97, no. 1 (January 2013): 87–102. http://dx.doi.org/10.1306/06121211136.
19
Kufrasa, Mateusz, Łukasz Słonka, Piotr Krzywiec, Krzysztof Dzwinel, and Jarosław Zacharski. "Fracture pattern of the Lower Paleozoic sedimentary cover in the Lublin Basin of southeastern Poland derived from seismic attribute analysis and structural restoration." Interpretation 6, no. 3 (August 1, 2018): SH73—SH89. http://dx.doi.org/10.1190/int-2017-0235.1.
Abstract:
We have characterized Late Devonian fracture systems in the northeastern part of the Lublin Basin in Poland using two independent approaches: (1) seismic data conditioning and volumetric attribute analysis and (2) structural restoration, geomechanical modeling, and fracture modeling. The study area was subjected to reverse faulting in the basement and fault-related folding at the end of Devonian. These late Devonian structures were not overprinted by later deformation events. We have applied a set of structurally oriented filters and seismic attributes aimed at highlighting discontinuities to reduce the seismic noise and improved the fracture visibility on structural steering volume. The main faults cutting intra-Neoproterozoic and intra-Ordovician horizons are principal east–west-striking reverse faults and minor northwest–southeast-oriented normal faults. Based on analysis of the seismic-scale faults, we have carried out fracture modeling for strike-slip and compressional stress fields, with a northwest–southeast-oriented axis of maximum compression. We have correlated tentative strikes for tensile, shear, and closing-mode fractures for both stress regimes, with fault-likelihood attribute maps. The observed fracture system can have developed in the strike-slip stress regime, although cracks generated due to gas overpressure, or of pre-Devonian age, are not excluded. The final fracture model may be extrapolated into Silurian strata, but the results should be perceived as a general approximation of structural trends due to significant differences in mechanical properties of Silurian shales and underlying Ordovician carbonates. Improved model calibration could be achieved after inspection of scanner image logs. We believe that understanding the fracture distribution within the gas-bearing Silurian strata may contribute to effective planning and performing of hydraulic fracturing because part of these fracture planes may be reopened and provide new conduits for fluid flow.
20
Khair, Hani Abul, Dennis Cooke, and Martin Hand. "Present-day in-situ stresses versus paleo-stresses for locating sweet spots in unconventional reservoirs." APPEA Journal 53, no. 1 (2013): 217. http://dx.doi.org/10.1071/aj12019.
Abstract:
The effect of stresses on permeability is a combination of external stress and pore pressure. The authors examine if and how present-day in-situ stresses and the spatial distribution of permeable locations in the Moomba-Big Lake fields in the Cooper Basin are correlated. Image logs, well logs, and formation tests are analysed and the orientation and magnitudes of the three principal stresses are calculated. A 3D model was constructed and the calculated stress magnitudes and orientations were applied to the model using the software Poly3D. The resulting stress distribution in the present-day stress state showed a potential sweet spot in the Big Lake field, which is presently the location of a gas pool that forms, with the Moomba field, one-third of the gas reserve in SA. No potential sweet spots, however, are located in the Moomba area. The authors also used the finite element method (FEM) and the boundary element method (BEM) for modelling the behaviour of folds, fractures, and faults and for mimicking the tectonic history of the basin. Software codes Dynel3D and Traptester were used to examine the validity of geomechanical restoration techniques for locating sweet spots in the Moomba-Big Lake fields. The methodology attempts to reconstruct the present-day structural and geometrical placement and to predict fractures generated due to stresses released during past tectonic events. Predicted stresses succeeded in mapping the same sweet spot in the Big Lake field using both software codes. Accordingly, the present permeability and production rate is controlled by a combination of present-day and stored stresses.
21
Xu, Guangxing, Pan Li, Shoufu Li, Teng Wang, Jianning Li, Tianchao Zhang, Jingzhong Zhao, et al. "Numerical Simulation Analysis and Research of Large Scale Garden Construction Waste Mounding Hill Landscaping." Highlights in Science, Engineering and Technology 75 (December 28, 2023): 360–66. http://dx.doi.org/10.54097/rqah1719.
Abstract:
Along with the rapid development of international metropolis, China's urbanization is developing faster and faster. In the process of China's urbanization development, mountain mounding with construction waste is one of the most direct, effective and economical means to deal with construction waste, not only that, but also, one of the important methods for ecological restoration project of landscape gardening, this method has several advantages such as green construction, green low carbon, energy saving and carbon reduction, etc. It also improves the utilization rate of resources, has high economic and environmental benefits, and also has high High research value and social significance.Since there are differences in the mechanical properties of the original soil and the mounded hill materials in the process of construction waste mounding, as well as, differences in the soil quality in different regions, it is necessary to study the stability of the hill. In this paper, the following research results are obtained through actual case studies of typical landscape projects: first, geomechanical tests are conducted on the raw soil and construction waste mound hill materials to obtain the particle size ratios, maximum dry density and optimum moisture content, and compression modulus of specific mixes, and the triaxial shear test proves that each stress-strain curve basically conforms to the Duncan-Zhang hyperbolic relationship assumption before the peak occurs.Finally, numerical simulations were carried out for different working conditions in combination with the three-dimensional calculation model, and the calculation and analysis of the Bishop consolidation theory were used to obtain the settlement displacement, horizontal displacement development and pore pressure dissipation process of the calculation model. The landslide stability of the slope is calculated and the minimum safety coefficient under normal conditions and the minimum safety coefficient under seismic conditions are both calculated by Swedish method and Bishop method respectively, both of which meet the requirements and determine the technical feasibility and reasonableness of the scheme. In the conclusion part of this paper, the problems and handling measures in the construction process are summarized to provide valuable experience for similar projects.
22
Maerten, Laurent, and Frantz Maerten. "Chronologic modeling of faulted and fractured reservoirs using geomechanically based restoration: Technique and industry applications." AAPG Bulletin 90, no. 8 (August 2006): 1201–26. http://dx.doi.org/10.1306/02240605116.
23
Moretti, I., F. Lepage, and M. Guiton. "KINE3D: a New 3d Restoration Method Based on a Mixed Approach Linking Geometry and Geomechanics." Oil & Gas Science and Technology 61, no. 2 (March 2006): 277–89. http://dx.doi.org/10.2516/ogst:2006021.
24
Liu, Shuizhen, Jianwei Feng, Josephine Anima Osafo, Guisheng Li, and Gang Li. "Quantitative prediction of multistage fractures of ultra-deep tight sandstone based on the theory of minimum energy dissipation." Frontiers in Earth Science 10 (January 13, 2023). http://dx.doi.org/10.3389/feart.2022.1036493.
Abstract:
Due to strong reservoir heterogeneity and low-resolution limit of geophysical data, it is difficult to predict fractures in ultra-deep reservoirs by conventional methods. In this research, we established a novel geomechanical model for prediction of fracture distribution in brittle reservoirs, especially for ultra-deep tight sandstone reservoirs. Methodologically, we intended to introduce the minimum energy dissipation principle considering time variable, combined with the generalized Hooke’s law containing damage variable, and obtained the energy dissipation rate expression corresponding to the energy dissipation process of brittle rocks. Combined with the three-shear energy yield criterion, the Lagrangian multiplier was introduced to deduce and construct the constitutive model and the failure criterion of rocks under the framework of the theory of minimum energy dissipation. Based on the law of conservation of energy, the stress-energy coupling characterization model of fracture density parameter was derived. Finally, all the improved geomechanical equations were incorporated into a finite element software to quantitatively simulate the distributions of tectonic stress filed and fractures based on paleo-structure restoration of Keshen anticline during the middle and late Himalayan periods. Its predictions agreed well with measured fracture density from reservoir cores and image logs.
25
Chernyshov, Sergey, Sergey Popov, Stanislav Varushkin, Alexandr Melekhin, Sergey Krivoshchekov, and Shaoran Ren. "Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling." Записки Горного института Online first (November 8, 2022). http://dx.doi.org/10.31897/pmi.2022.51.
Abstract:
The article presents the results of analysing geological structure of the Famennian deposits (Devonian) in the Perm Region. Numerical modelling of the distribution of inhomogeneous stress field near the well was performed for the two considered types of perforation. With regard for the geometry of the forming perforation channels, numerical finite element models of near-wellbore zones were created considering slotted and cumulative perforation. It is ascertained that in the course of slotted perforation, conditions are created for a significant restoration of effective stresses and, as a result, restoration of reservoir rock permeability. Stress recovery area lies near the well within a radius equal to the length of the slots, and depends on the drawdown, with its increase, the area decreases. From the assessment of failure areas, it was found that in case of slotted perforation, the reservoir in near-wellbore zone remains stable, and failure zones can appear only at drawdowns of 10 MPa and more. The opposite situation was recorded for cumulative perforation; failure zones near the holes appear even at a drawdown of 2 MPa. In general, the analysis of results of numerical simulation of the stress state for two simulated types of perforation suggests that slotted perforation is more efficient than cumulative perforation. At the same time, the final conclusion could be drawn after determining the patterns of changes in permeability of the considered rocks under the influence of changing effective stresses and performing calculations of well flow rates after making the considered types of perforation channels.
26
Bruno, Giovanni, Daniele Tupputi, and Vincenzo Simeone. "Geomechanical modelling and stability analysis of the shallow underground water reservoir ‘Palombaro Lungo’ (Matera-Italy)." Environmental Earth Sciences 82, no. 12 (May 31, 2023). http://dx.doi.org/10.1007/s12665-023-11001-2.
Abstract:
AbstractThe city of Matera, as several other ancient historical cities and towns, is recovering a large part of its ancient parts developing a policy of urban regeneration. In the early 90s, during the restoration works of the main square, Piazza Vittorio Veneto, it was re-discovered a huge underground space used as water reservoir named Palombaro Lungo. It was built linking ancient pre-existing smaller caves and completed at the end of the nineteenth century making it impermeable with the cocciopesto (opus signinum) technique. The hypogeum is dug in a Plio-Pleistocene rock called Gravina Calcarenite. It is a calcareous sandstone weak rock with good mechanical properties, low permeability and easy to be dug. The internal geometry of the hypogeum and the rock thicknesses above the caves was reconstructed by the integration of topographic and GPR surveys. The paper presents a geo-mechanical model of Palombaro Lungo underground reservoir and evaluation about the stability of this structure. The stability analysis were developed using the numerical code UDEC for several transect of Palombaro Lungo assuming the calcareous sandstone blocks as deformable, trying to address the evolution of the stress–strain conditions. The case study can be considered as an example of general interest for the study of rupestrian underground reservoir of a longed form, where one planimetric dimension strictly prevails over the other. Numerical simulations showed a stress–strain state compatible with the fractures detected in situ and confirmed the absence of instability problems in the groundwater reservoir.
27
Deniz, Burcu Ertas, and Tamer Topal. "Prediction of uniaxial compressive strength of the Kızılkaya ignimbrite with variable properties using MRA and ANN, Cappadocia (Turkey)." Discover Environment 1, no. 1 (September 14, 2023). http://dx.doi.org/10.1007/s44274-023-00013-1.
Abstract:
AbstractCappadocia in Turkey is an important region with emphasis on ethnic and historic structures and geological features. Because of volcanic eruptions, ash flow materials deposited at different levels. These different colored ignimbrite levels have a wide range of geomechanical properties. In the region, the Kızılkaya ignimbrite covers a very large area and is frequently used as building dimension stone in for the restoration of old historical buildings such as churches, caravansaries and mosques as well as new buildings. It contains tuffaceous matrix with some minerals and rock fragments. The rock has variable character. In this study, the relationship between petrographic and physico-mechanical properties of the Kızılkaya ignimbrite was investigated. Rate of change between uniaxial compressive strength and the other index properties of the rock was statistically examined utilizing multiple regression analysis (MRA) and Artificial Neural Network (ANN) methods. The study has shown that uniaxial compressive strength (UCS) of the ignimbrite can be successfully estimated by the use of dry unit weight, effective porosity, sonic velocity, and grain matrix ratio (GMR) parameters. A new UCS prediction equation is proposed in this paper for the ignimbrite with variable character. Since properties of the ignimbrite at different distances from the eruption area changes significantly, the approach presented in this study can be considered for the ignimbrites especially covering a large area with different welding degrees and grains.
28
Голик, В. И., О. Г. Бурдзиева, and Б. В. Дзеранов. "Geophysical monitoring of the development of stress-deformed ore massives." Геология и геофизика Юга России, no. 2 (June 30, 2021). http://dx.doi.org/10.46698/vnc.2021.57.57.005.
Abstract:
Рассмотрены актуальные вопросы рационализации природопользования, включающие в себя установление величины и закономерностей экологического риска технологических процессов, оценку процессов коммуникации техногенных продуктов и прогнозирование экологической зависимости биоты от горного производства при подземной разработке месторождений Садонского рудного узла. Целью исследований является определение форм взаимодействия природных и технических систем, определяющих параметры геомеханики участка земной коры в районе освоения недр путем исследования напряженно-деформированного состояния массивов для разработки приемлемых вариантов добычи металлических руд. Методы исследования. Приведены результаты моделирования состояния рудовмещающих массивов на оптически активных материалах. Предложен коэффициент надежности для оценки безопасности горных технологий по развитию критических напряжений и деформаций. Результаты работы. Установлена адекватная зависимость между характером силового воздействия на природные и искусственные массивы и их устойчивостью с корреляцией между напряженностью массива и сохранностью земной поверхности, как гаранта безопасности экосистем биосферы. Даны результаты моделирования напряженности массива методом конечных элементов, распределения давления по контуру выработки на крепь и исследования фильтрационной неоднородности руд. Обобщены результаты анализа ретро-и перспектив развития способов управления состоянием массивов при разработке месторождений. Сделан вывод о возможности обеспечения оптимального соотношения напряжений в элементах геомеханической системы геофизическими методами в рамках мониторинга состояния горного массива и подземных выработок. В совокупности рекомендации представляют собой программу выхода горных предприятий региона из затяжного кризиса и восстановления былого потенциала одного из флагманов цветной металлургии, реализация которой формирует экономический, экологический и социальный эффект в условиях депрессивного промышленного региона. Topical issues of rationalization of nature management are considered, including the establishment of the magnitude and regularities of the ecological risk of technological processes, the assessment of the communication processes of technogenic products and the prediction of the ecological dependence of biota on mining during the underground development of the deposits of the Sadonsky ore cluster. The Aim of the research is to comprehensively study the interaction of natural and technical systems that ensure the geomechanical balance of massifs in the area of subsoil development by systematic monitoring of the stress-strain state of the massifs using the methods of complex generalization, analysis of practical experience and scientific achievements in the field of underground ore mining in the massifs. Complex structure, theory and practice of destruction of solid media by means of continuum mechanics and mathematical statistics with the development of economically and environmentally acceptable options for the extraction of metal ores. Methods. The results of modeling the state of ore-bearing massifs on optically active materials are presented. A reliability factor is proposed for assessing the safety of mining technologies for the development of critical stresses and deformations. Results. An adequate relationship has been established between the nature of the force impact on natural and artificial massifs and their stability with the correlation between the strength of the massif and the safety of the earth's surface, as a guarantor of the safety of biosphere ecosystems. The results of modeling the tension of the massif by the finite element method, the distribution of pressure along the contour of the excavation on the support and the study of the filtration heterogeneity of ores crushed for leaching purposes according to the propagation velocity of stress waves are given. The results of the analysis of retro- and prospects for the development of methods for managing the state of rock mass in the development of fields are generalized. A conclusion is made about the possibility of ensuring the optimal stress ratio in the elements of the geomechanical system by geophysical methods within the framework of monitoring the state of the rock mass and underground workings. Taken together, the recommendations represent a program for the recovery of the region's mining enterprises from a protracted crisis and the restoration of the former potential of one of the flagships of non-ferrous metallurgy, the implementation of which creates an economic, environmental and social effect in a depressed industrial region.