2 edition of Cluster analysis of induced seismicity data found in the catalog.
Cluster analysis of induced seismicity data
|Statement||by Jinwei Ren.|
|Contributions||University College Dublin. Department of Geology.|
|The Physical Object|
|Pagination||iv, 66p. :|
|Number of Pages||66|
Hydraulic fracturing (or fracking) has been a source of both achievement and controversy for years, and it continues to be a hot-button issue all over the world. It has made the United States an energy exporting country once again and kept the price of gasoline low, for consumers and companies. On the other hand, it has been potentially a dangerous and destructive practice that has led to. Conclusions on the importance of impoundment and/or stage-level change on large earthquake triggering are somewhat difficult to reach because there is a tendency to report cases mainly where anomalous seismicity is noted; an exception is a comprehensive analysis of Japanese reservoirs by Ohtake (), who found that ∼20% of the total number. In Fig. 9 the relationship shown in Fig. 8 concerning the results of the synthetic seismicity, is enriched by the results obtained by Telesca et al. on real seismicity data recorded in five seismic areas of the Mexican sub-duction zone: the linear correlation between the b-value and the k-M slope is very good as well (R 2 ∼).
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Mining induced seismicity in the Ruhr Basin cluster association (Israelson, ; Harris, ). MASTER EVENT CORRELATION BY DYNAMIC Instead of cross-correlation in the time domain, WAVEFORM MATCHING cross-spectral analysis can be used for master event Nonlinear correlation methods were introduced.
We introduce a statistical methodology for clustering analysis of seismicity in the time-space-energy domain and use it to establish the existence of two statistically distinct populations of. Clustering in Hamm region through time: for mining induced seismicity, clear temporal clustering can be resolved besides spatial clustering of Figure 5.
However, this effect cannot be attributed directly to mining activities which were constant through years.,~ H. SCHULTE-THEIS and M.
JOSWtG events of the epicenter region Hamm between Cited by: Longwall mining activity in the Ruhr-coal mining district leads to mining-induced seismicity. For detailed studies seismicity of the single longwall panel S beneath Hamm-Herringen in the eastern Ruhr area was monitored between June and July More than seismic events with magnitudes ≤ ML ≤ are localized in this period.
70% of the events occur in the Author: S. Wehling-Benatelli, D. Becker, M. Bischoff, W. Friederich, T.
Meier. An application to Cluster analysis of induced seismicity data book data from mining induced seismicity illustrates possible applications of the method and demonstrate the cluster detection and event classification performance with different moment tensor catalogues.
Results proof that main earthquake source types occur on spatially separated faults, and that temporal changes in the Cited by: Journals & Books; Help; Geothermics.
Supports open access. Articles and issues. About. select article Identification of faults activated during the stimulation of the Basel geothermal project from cluster analysis and focal mechanisms of the larger magnitude events select article High-resolution analysis of seismicity induced at Berlín.
In this overview we report results of analysing induced seismicity in geothermal reservoirs in various tectonic settings within the framework of the European Geothermal Engineering Integrating Mitigation of Induced Seismicity in Reservoirs (GEISER) the reconnaissance phase of a field, the subsurface fault mapping, in situ stress and the seismic network are of primary.
First, small induced microseismic events may be used for tracking the fluid distribution and characterizing the reservoir as analysis and interpretation of waveform data may provide information on the distribution of CO 2 within the reservoir.
Second, induced seismicity monitoring is necessary for risk assessment and mitigation. Induced seismicity has been observed in the Three Gorges Reservoir (TGR) area, central China, since its impoundment in May, Data from a local seismic network in the TGR area and a temporal network allow us to obtain a detailed picture of the spatio-temporal distribution of earthquakes in the Badong area, in which earthquakes are clustered.
The proposed Induced Seismicity Test Bench requires models to be tested, good quality induced seismicity data sets, and a robust statistical testing framework allowing objective model evaluation.
To test model consistency with observations and to rank models, we rely on pseudoprospective forecasting, i.e., data that come from past stimulation. microseismic events. Criteria for defining a cluster were identified, using three-dimensional statistics and the establishment of threshold levels Cluster analysis of induced seismicity data book assessing clusters.
Analysis was carried out using existing mathematical procedures. These were shown to be able to sort the seismic data and identify clusters. Initially, synthetic. Induced seismicity is related to stress changes in the reservoir and surrounding rocks that can be caused by various mechanisms ranging from pore pressure variations, to geochemical reactions, temperature effects, and either locking or reactivation of pre-existing faults.
Accordingly, the patterns of induced seismicity vary a lot for different fields or events within the same field over space.
Magnitude-recurrence parameters for induced seismicity; Source model for induced-seismicity in hazard analysis framework; 2 – The Evolution of Induced Seismicity. Develop a quality baseline seismicity catalogue; Characterize activity rates over time; 3 – Characterization of Seismicity Patterns in Alberta.
Improve earthquake locations and. Interpretation of passive-seismic data for induced seismicity, considered here as events with M W ≥ 0, is the subject of the next chapter.
In the case of hydraulic-fracture monitoring, microseismic data are generally acquired for the following purposes: • surveillance of the growth of fracture networks. Mining-induced seismicity at Junction Gold Mine became a serious operational problem in the late ’s.
Assessing the local seismic hazard is an important step in assessing the risk associated. The cluster formation of about induced microearthquakes (mostly M L. In general, induced seismicity refers to seismic events that are a result of human activity. There are many different ways in which human activity can cause induced seismicity including geothermal operations, reservoir impoundment (water behind dams), waste water injections, and oil and gas operations such as hydraulic fracturing.
In the oil and gas industry, induced. The Rangely, Colorado, induced seismicity experiment is an important milestone in the study of induced seismicity that firmly established the effective stress mechanism for induced seismicity. Water injection at the Rangely oilfield began in in response to declining petroleum production and decreased reservoir pressures.
Analysis of Induced Seismicity. Data analysis from information collected from a seismic monitoring network in a mine will determine the seismic parameters of the separate seismic event clusters in the mine. For each seismic cluster, seismic parameters are to be analyzed in order to design for mitigation of seismic damage.
Abstract We analyze data from 6, multistage horizontal hydraulic fracturing wells drilled into the Montney Formation over a large region in western Canada to evaluate the impact of geological, g. Given the paucity of induced seismicity data for CO.
2 storage sites, it is necessary to consider induced seismicity produced by water injection. Supercritical CO 2 is more compressible and less dense than water at pressures and temperatures typical of CCS reservoirs and these differences could cause variations in their patterns of seismicity.
examine data in four regions with a clear-cut dominant tectonic or human-related driver of seismicity and two additional re-gions with mixed activity. The latter two regions experienced development of geothermal production during the instrumental period, which is reflected in temporal evolution of cluster.
The report begins with an examination of the types and potential causes or mechanisms for induced seismicity, reviews the four energy technologies that are the subject of the study and the ways they may induce seismic activity, and discusses government roles and responsibilities related to underground injection and induced seismicity.
Y Mukuhira, K Fuse, M Naoi, MC Fehler, H Moriya, T Ito, H Asanuma, MO Häring, Hybrid focal mechanism determination: constraining focal mechanisms of injection induced seismicity using in situ stress data, Geophysical Journal International, /gji/ggy,2, (), ().
In the seismicity cluster surrounding the injection well, the maximum potential earthquake size estimated by these methods and the observed maximum. Induced seismicity is seismicity caused by human activity.
It has been associated with several industrial practices such as dam building, mining and hydraulic fracturing. The energy released by hydraulic fracturing or injections into wells can trigger movement along existing fault lines, leading to induced seismic events.
Cases of relatively deep induced seismicity far from injection sites have been reported in several other regions such as Oklahoma, Colorado, and Arkansas, where induced earthquakes occurred at 8 km depth and 7 to 35 km distance from the injection well [Hsieh and Bredehoeft, ; Horton, ; Keranen et al., ].
The clustering behavior of injection‐induced earthquakes is examined using one month of data recorded by the LArge‐ n Seismic Survey in Oklahoma (LASSO) array. The ‐node seismic array was deployed in a 25 km × 32 km area of active saltwater disposal in northern Oklahoma between 14 April and 10 May Injection rates in the study area are nearly constant around the time of the.
Induced seismicity refers to typically minor earthquakes and tremors that are caused by human activity that alters the stresses and strains on the Earth's induced seismicity is of a low magnitude.A few sites regularly have larger quakes, such as The Geysers geothermal plant in California which averaged two M4 events and 15 M3 events every year from to Induced earthquakes are usually small in magnitude (analysis of induced microearthquakes can be helpful in understanding the effects of oil and.
The problem of mining-induced seismicity in hardrock mines has become significant as underground mines from around the world are pushing production to deeper levels.
At many mines, the risk associated with large seismic events and rockburst damage must be managed to ensure the safety of mine workers and minimise production losses. In this paper, an engineering approach to seismic risk. This analysis does not account for the spatial clustering of earthquakes, but rather utilizes all induced events in the data set.
The volume of injected brine affecting individual clusters of seismicity relative to the total volume of injected brine is unknown, and therefore it is not possible to perform this analysis for individual clusters. During PSHA analysis my site is located inside the one seismic zone, with lamda =, betaMmin, and Mmax with PSHA with return period years, I am.
Observations in enhanced geothermal system (EGS) reservoirs of induced seismicity and slow aseismic slip ruptures on related faults suggest a close link between the two phenomena. We base our approach on the case study of the EGS site of Soultz-sous-Forêts where seismicity has been shown in particular during the stimulation to be induced not only by fluid pressure increase.
Elementary cluster analysis of induced seismicity in a South African gold mine has shown that there is a clear interaction amongst the clusters; and that the level of the interaction is a function. For more infos/ data / discussions, please visit the poster of Villiger et al., today, P Micro-seismic monitoring can resolve centimeter to meter scale fracturing processes.
Strong variability in seismicity and hydro-mechanical response in a small rock volume. Our induced seismicity data set is complemented with many other.
Induced seismic events are of high scientific and economic significance. They are the result of human activities interacting with regional and local tectonics, changing the local crustal stress state by mining, extraction of rock masses, injection of fluids into the rock massif, and by changing the surface loading and pore pressure state near large reservoirs.
that “Data is not as interesting as insight” (Peterson et al., ), that forms the basis for the new techniques in understanding the complexity of mining-induced seismicity hazards in the form of simplified, yet highly informative Seismic Excavation Hazard Maps.
Induced seismicity analysis for reservoir characterization at a petroleum field in Oman. Ph.D. thesis, Massachusetts Institute of Technology, Cambridge.
van Eck, T., F. Goutbeek, H. Haak, and B. Dost. Seismic hazard due to small-magnitude, shallow-source, induce earthquakes in the Netherlands. Show this book's table of contents, where. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Increased levels of seismicity coinciding with injection of reservoir fluids have prompted interest in methods to distinguish induced from natural seismicity.
Discrimination between induced and natural seismicity is especially difficult in areas that have high levels of natural seismicity, such as the geothermal. Induced seismicity related to underground injection of liquids has been widely reported (1 –10) but there are very few reports of gas injection triggering earthquakes large enough to be felt or cause damage at thethe injection-induced earthquakes of concern are not the tiny events accompanying hydrofracturing that have magnitudes of or smaller; rather, they are the larger.Obtaining Absolute Locations for Quarry Seismicity Using Remote Sensing Data by Guoqing Lin, Peter Shearer, and Yuri Fialko Abstract We obtain absolute locations for 19 clusters of mining-induced seis-micity in southern California by identifying quarries using remote sensing data, in- and cluster analysis methods.
The relative location.Our analysis of data from injection‐induced seismicity, natural earthquake swarms, and aftershock sequences shows that in most cases the effective stress‐drop estimate is rather stable during the cluster evolution.
However, slightly increasing estimates for injection‐induced seismicity are indicative for the local forcing of the system.