pure and applied geophysics最新文献

{"title":"Impacts of Socioeconomic Development on Fine Particulate Matter (PM2.5) and Human Comfort in the State of Kuwait","authors":"Hasan Aldashti,&nbsp;Zaher AlAbadla,&nbsp;Mohamad Magdy Abdel Wahab,&nbsp;Mohamed F. Yassin","doi":"10.1007/s00024-024-03506-z","DOIUrl":"10.1007/s00024-024-03506-z","url":null,"abstract":"<div><p>The relationship between particulate matter and economic growth, as well as the relationship between economic growth and Greenhouse Gas emissions, has been the topic of considerable investigations over the past two decades. Kuwait has a hot, dry, and desert climate that makes the outside air affected by natural and other unnatural factors. Fine Particulate Matter (PM_2.5) samples were monthly collected for a 41-years (from 1980 to 2021) over the state of Kuwait. This study presents a detailed investigation of possible correlation and regression analysis between PM_2.5 mass column concentration and socioeconomic factors, and they are as follows: GDP per Capita (GDPP), Greenhouse Gas emissions, and population density during the same period. The correlation between per Capita GDP and PM_2.5 concentration is statistically positive and supported at the highest level of significance. The Greenhouse Gas emissions and population density proportion exhibit significant positive effects, demonstrating that these two factors strongly affect PM_2.5 pollution. The results of the regression analysis for Kuwait shows a significant positive relationship between GDP per Capita and PM_2.5, all of which remained significant at the 1% level. The consequence of the increase in per Capita GDP, according to the results reported in the study, should be an increase in the level of PM_2.5 column density and vice versa. A significant positive correlation with a value of 0.8805 was found between Physiological Equivalent Temperature (PET) in extremely hot years and Gross Domestic Product (GDP). Human activities lead to an environmental imbalance, and this will certainly affect future generations, so what is required to do is to feel a moral responsibility towards the environment around us.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 6","pages":"1907 - 1918"},"PeriodicalIF":1.9,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristics of Marine Heatwaves of the Baltic Sea for 1993−2022 and Their Driving Factors","authors":"Vladimir S. Travkin,&nbsp;Natalia A. Tikhonova,&nbsp;Eugeny A. Zakharchuk","doi":"10.1007/s00024-024-03504-1","DOIUrl":"10.1007/s00024-024-03504-1","url":null,"abstract":"<div><p>Marine heatwaves (MHWs) are extreme ocean events with prolonged discrete periods of anomalously warm water, that have significant impacts on fisheries, tourism, and marine ecosystems. We identify MHWs as discrete periods (≥ 5 days) when the sea surface temperature exceeds the threshold (90th percentile) of the sea surface temperature distribution for specific calendar days and analyze their main properties in the Baltic Sea for the period 1993−2022. Also, we investigate the main mechanisms of evolution one of the most intense and continuous MHW, observed from October 2000 to March 2001. We use temperature, salinity, mixed layer depth, and current velocity daily data from regional reanalysis of the Baltic Sea (2 nautical mile horizontal resolution, vertical step from 1 m on the surface to 24 m on the bottom). We also use monthly data from global climate reanalysis ECMWF ERA5 (0.25° × 0.25°) and meteorological stations of the Swedish Meteorological and Hydrological Institute. From 40 to 90 MHWs with an average duration and intensity (8−24 days and 1.75−3.25 °C) were detected in various parts of the Baltic Sea during the period 1993−2022. The maximum cumulative values (&gt; 2400 °C days) were observed in the Gotland Basins, the Gulf of Finland, and the Gulf of Riga. The mean intensity and cumulative values of MHWs are stronger in summer (3.6 °C and 740 °C days). A long existence of MHW in the autumn–winter period 2000–2001 was associated with positive air temperature anomalies (&gt; 4 °C) and a sharp weakening of wind speed in the Baltic region.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 7","pages":"2373 - 2387"},"PeriodicalIF":1.9,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Choices of Slip Function and Simulated Ground Motions","authors":"Igor A. Beresnev","doi":"10.1007/s00024-024-03502-3","DOIUrl":"10.1007/s00024-024-03502-3","url":null,"abstract":"<div><p>Kinematic simulations of strong ground motions require representation of the temporal functional form of fault slip. There is a range of source time functions that are commonly used: those that are generalized from numerical simulations of crack dynamics or those that radiate the seismic spectra of the omega-<i>n</i> type. All are physical plausible, while the modern source-inversion studies are still unable to better constrain the choices available. The uncertainty in the kinematically simulated motions due to the ambiguity in assigning an underlining form of fault slip still requires rigorous quantification. The representation integral of elasticity is an appropriate analytical tool, providing the exact seismic field in the entire practically relevant frequency band and including all near- and far-field terms. The smooth dynamically compatible version of the source time function, in which the rise time is the governing parameter, has the drawback of implicitly leading to unreasonably high slip rates and, as a consequence, unrealistically extreme ground velocities and accelerations. On the other hand, the functions, both dynamic and of the omega-<i>n</i> type, in which the static offset <i>U</i> and peak rate of slip <i>v</i>_max are the two independent controlling parameters, all provide nearly the same peak-motion values that match the prescribed, realistically observed coseismic fault-slip rates. With <i>U</i> and <i>v</i>_max as the correctly prescribed slip parameters, respectively controlling the low- and high-frequency ends of the radiated spectra, the choice between a dynamic or omega-<i>n</i> function leads to insignificant differences in radiation, causing the uncertainty in peak motions not exceeding approximately 10%.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 6","pages":"1859 - 1869"},"PeriodicalIF":1.9,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geophysical Investigation and 3D Modeling of Bedrock Morphology in an Urban Sediment-Filled Basin: The Case of Bolzano (Northern Italy)","authors":"Sgattoni Giulia,&nbsp;Morelli Corrado,&nbsp;Lattanzi Giovanni,&nbsp;Castellaro Silvia,&nbsp;Cucato Maurizio,&nbsp;Chwatal Werner,&nbsp;Mair Volkmar","doi":"10.1007/s00024-024-03512-1","DOIUrl":"10.1007/s00024-024-03512-1","url":null,"abstract":"<div><p>Bedrock mapping is essential for understanding seismic amplification, particularly in sediment-filled valleys or basins. However, this can be hard in urban environments. We conducted a geophysical investigation of the sediment-filled Bolzano basin in Northern Italy, where three valleys converge. This study uses low-impact, single-station geophysical methods suitable for urban areas to address the challenges of mapping in such environments. A dataset of 574 microtremor and gravity measurements, along with three seismic reflection lines, allows for the inference of the basin’s deep bedrock morphology, even without direct stratigraphic data. The dataset facilitates a detailed analysis of the spatial patterns of resonance frequencies and amplitudes, revealing 1D and 2D characteristics of the resonances. Notably, 2D resonances predominate along the Adige valley, i.e., the deepest part of the basin with depths up to 900 m. These 2D resonances, which cannot be interpreted through simple 1D frequency-depth relationships, are better understood by integrating gravity data to develop a depth model. The study identifies resonance frequencies ranging from 0.27 to over 3 Hz in Bolzano, affecting different building types during earthquakes. Maximum resonance amplitudes occur at lower frequencies, specifically at 2D resonance sites, therefore primarily impacting high structures. The 2D resonances are directional, with the most significant amplification occurring longitudinally along the valley axes. The resulting 3D bedrock model aids in seismic site response modeling, hydrogeological studies, and geothermal exploration and provides insights into the geological history of the basin, highlighting the role of the Adige Valley as a major drainage pathway.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 6","pages":"1871 - 1893"},"PeriodicalIF":1.9,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00024-024-03512-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Estimation of Surface Soil Moisture by Machine Learning Algorithms in Different Climatic Types","authors":"Sadaf Ahmadnejad,&nbsp;Mehdi Nadi,&nbsp;Pouya Aghelpour","doi":"10.1007/s00024-024-03508-x","DOIUrl":"10.1007/s00024-024-03508-x","url":null,"abstract":"<div><p>The present study was designed to provide a model for surface soil moisture numerical estimation. This assessment is done based on the direct ground measurement of soil moisture in 5 cm (SM5) and 10 cm (SM10) depths using machine learning models. To do this, various meteorological variables (16 variables) were used as model inputs. The data were evaluated on a daily scale during 2017–2020. Of these data, 75% of days were randomly considered as train and 25% as test. The components relevant to air and soil temperature, relative air humidity, evaporation, and vapor pressure are the most important factors that affect daily soil moisture. A mixture of these variables is used as model input. For this purpose, two machine learning models, including a multilayer perceptron (MLP) neural network and an adaptive neuro-fuzzy inference system (ANFIS) were used. Three agriculture meteoritical stations located in three different climates were assessed: (1) Gharakhil Station (semi-humid and moderate), Zarghan Station (semi-arid and cold), and Zahak Station (extra-arid and moderate). According to the comparison between estimates and measurements, both models had a relatively desired performance in Gharakhil and Zarghan (57% &lt; R2 &lt; 66% for SM5 and 45% &lt; R2 &lt; 58% for SM10). However, the performances were weak and almost unacceptable in the extra-arid Zahak climate (14% &lt; R2 &lt; 17% for SM5 and 18% &lt; R2 &lt; 22% for SM10). According to the relative root mean square error (RRMSE) and Nash–Sutcliffe value of stations, the models in humid climates, performed better than those in arid and extra-arid climates. The best RRMSE value was obtained by ANFIS in Gharakhil Stations (0.193 for SM5 and 0.178 for SM10), while the weakest RRMSE value was obtained in Zahak Station, which equaled 0.887 (via MLP) and 0.767 (via ANFIS) for SM5 and SM10, respectively. The applied models were not superior to each other; however, the ANFIS model was slightly superior to MLP in most cases.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 7","pages":"2149 - 2175"},"PeriodicalIF":1.9,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Observational Case Study of a Radiation Fog Event","authors":"Arun Gandhi,&nbsp;István Geresdi,&nbsp;András Zénó Gyöngyösi,&nbsp;Ágoston Vilmos Tordai,&nbsp;Péter Torma,&nbsp;András Rehak,&nbsp;Mariann Bíró-Szilágyi,&nbsp;Gyula Horvath,&nbsp;Zita Ferenczi,&nbsp;Kornélia Imre,&nbsp;István Lázár,&nbsp;András Peterka,&nbsp;Tamás Weidinger","doi":"10.1007/s00024-024-03498-w","DOIUrl":"10.1007/s00024-024-03498-w","url":null,"abstract":"<div><p>A micrometeorological fog experiment was carried out in Budapest, Hungary during the winter half year of 2020–2021. The field observation involved (i) standard meteorological and radiosonde measurements; (ii) surface radiation balance and energy budget components, and (iii) ceilometer measurements. 23 fog events occurred during the whole campaign. Foggy events were categorized based on two different methods suggested by Tardif and Rasmussen (2007) and Lin et al. (2022). Using the Present Weather Detector and Visibility sensor (PWD12), duration of foggy periods are approximately shorter (~ 9%) compared to ceilometer measurements. The categorization of fog based on two different methods suggests that duration of radiation fogs is lower compared to that of cloud base lowering (CBL) fogs. The results of analysis of observed data about the longest fog event suggest that (i) it was a radiation fog that developed from the surface upwards with condition of a near neutral temperature profile. Near the surface the turbulent kinetic energy and turbulent momentum fluxes remained smaller than 0.4 m² s^–2 and 0.06 kg m^–1 s^–2, respectively. In the surface layer the vertical profile of the sensible heat flux was near constant (it changes with height ~ 10%), and during the evolution of the fog, its maximum value was smaller than 25 W m^–2, (ii) the dissipation of the fog occurred due to increase of turbulence, (iii) longwave energy budget was close to zero during fog, and a significant increase of virtual potential temperature with height was observed before fog onset. The complete dataset gives an opportunity to quantify local effects, such as tracking the effect of strengthening of wind for modification of stability, surface layer profiles and visibility. Fog formation, development and dissipation are quantified based on the micrometeorological observations performed in suburb area of Budapest, providing a processing algorithm for investigating various fog events for synoptic analysis and for optimization of numerical model parameterizations.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 6","pages":"2025 - 2049"},"PeriodicalIF":1.9,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00024-024-03498-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterising the Radionuclide Fingerprint of an Advanced Gas-Cooled Nuclear Power Reactor","authors":"M. A. Goodwin, A. Petts, B. D. Milbrath, A. Ringbom, D. L. Chester, T. W. Bowyer, J. L. Burnett, J. Friese, L. Lidey, J. C. Hayes, P. W. Eslinger, M. Mayer, D. Keller, R. Sarathi, C. Johnson, M. Aldener, S. Liljegren, T. Fritioff, J. Kastlander, S. J. Leadbetter","doi":"10.1007/s00024-024-03488-y","DOIUrl":"https://doi.org/10.1007/s00024-024-03488-y","url":null,"abstract":"<p>Radionuclides are monitored in the atmosphere for the signatures of nuclear explosions, as part of the verification of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Civil nuclear facilities, such as Nuclear Power Plants (NPPs) and Isotope Production Facilities (IPFs) are sources of anthropogenic radionuclides in the atmosphere and these signatures are sometimes indistinguishable to those of a nuclear explosion. In order to improve the understanding of civil radionuclide-emitting facilities and their impact on the International Monitoring System (IMS) of the CTBT, a group of scientists from the UK, US and Sweden are collaborating with EDF Energy UK to measure radionuclide emissions from an Advanced Gas-cooled Reactor (AGR) nuclear power station. Emissions are being measured at the source, via a stack monitor and high-resolution gamma spectrometry measurements of filters and also at tens of kilometres away via three sensitive radioxenon atmospheric samplers. The timing, isotopic composition, activity magnitudes and other release parameters of interest are investigated, to improve the discrimination between a civil radionuclide release and an explosive nuclear test. This paper outlines the work of the Xenon and Environmental Nuclide Analysis at Hartlepool (XENAH) collaboration, describes the equipment fielded and provides initial results from each measurement campaign.</p>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"37 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Re-Evaluation of the Earthquake Catalog for Spain Using the EMS-98 Scale for the Period 1900–1962","authors":"J. Fernández-Fraile, Maurizio Mattesini, E. Buforn","doi":"10.1007/s00024-024-03461-9","DOIUrl":"https://doi.org/10.1007/s00024-024-03461-9","url":null,"abstract":"<p>This study uses a systematic methodology for the re-evaluation and analysis of earthquakes in the first half of the 20th century in Spain, a period with very inhomogeneous information sources. To the best of our knowledge, these earthquakes have never been previously re-evaluated using as many information sources as the collected in this paper. The methodology used in this paper has been tested in SE Spain for further application in the rest of the Iberian Peninsula. We have collected and thoroughly revised all the seismic information and data sources available, ranging from specific reports, macroseismic questionnaires, and seismograms to newspapers and pictures. In addition, for a set of 16 earthquakes between 1900 and 1962 in the selected area, we provide EMS-98 intensities and macroseismic epicenters, except for one that is instrumental. Among the 16 earthquakes, it has only been possible to provide a depth value for eight of them. The seismic intensities have been evaluated using the intensity scale EMS-98, and the epicenters have been located with both instrumental methods (Hypocenter location) and macroseismic methods (such as Bakun, Boxer 4.0 and MEEP 2.0). Our results show that, I_max (maximum seismic intensity) values from the IGN catalogue are larger in more than the half of the revised earthquakes by between a half degree to two-and-a-half degrees, and only for Lorquí earthquake on April 25th, 1912, the I_max was smaller by half a degree. Most of the epicenters were also updated with changes between 1 and 41 km. Focal depths are less than 10 km, but this parameter has large uncertainties. The result of this study is a homogeneous seismic catalog (re-evaluated epicenters and I_max) for the period 1900–1962 that can be compared with periods prior to the 20th century.</p>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"3 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TIMING Analysis of the Multiple Passages of the Pressure Wave Generated by the 2022 Hunga Tonga-Hunga Ha’apai and Comparison with the 1883 Krakatoa Pressure Wave","authors":"Ronan Le Bras, Paulina Bittner, Jolanta Kuśmierczyk-Michulec, Pierrick Mialle, Gérard Rambolamanana","doi":"10.1007/s00024-024-03507-y","DOIUrl":"https://doi.org/10.1007/s00024-024-03507-y","url":null,"abstract":"<p>The Hunga Tonga-Hunga Ha’apai (HTHH) eruption of 15 January 2022 was an exceptional event by the period, magnitude, and duration of propagation of the atmospheric waves it generated, which circled the Earth multiple times. This event, taking into account the magnitude of the atmospheric pressure waves, is comparable only to the Krakatoa eruption of 1883. To compare both eruptive sequences, a method similar to the analysis of the timing of the arrival of multiple phases at barometric stations, as reported in (Strachey, R., Stokes G.G., Scott, R.H. (1888). On the air waves and sound caused by the Krakatoa eruption of August 1883, in “The eruption of Krakatoa and subsequent phenomena,” Symons, G. J. (ed.). Report of the Krakatoa Committee of the Royal Society (Trübner and Co., London)) for Krakatoa, was used. Since the HTHH volcanic event gave rise to the only volcanic pressure wave known to have circled within the Earth’s atmosphere multiple times in the last 139 years, it is of interest to perform similar timing statistics on the multiple passages of the waves at stations that recorded them. A review of the Krakatoa analysis and a comparison with the HTHH are presented, with possible implications on the physical parameters affecting its speed of propagation. Changes in the global state of the atmosphere during the interval between the two events may also explain some of the differences observed.</p>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"49 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of Pore Structure for Heterogeneous Reservoirs Based on the Theory of Differential Poroelasticity","authors":"Jing Ba,&nbsp;Zhijiang Ai,&nbsp;José M. Carcione,&nbsp;Mengqiang Pang,&nbsp;Xinfei Yan,&nbsp;Xiao Chen","doi":"10.1007/s00024-024-03510-3","DOIUrl":"10.1007/s00024-024-03510-3","url":null,"abstract":"<div><p>The complex seismic responses of heterogeneous reservoirs can be related to the fabric structure, pore/microcrack shape, mineral composition and fluid distribution of the rock in situ. The pore structure refers to the geometric shape, size, spatial distribution and interconnectedness of pores, microcracks and throats. It is closely related to the storage space of reservoirs and the spatial distribution of oil/gas. Understanding the pore structure is crucial for the development of processes to increase oil/gas production capacity. Six dolomite samples from the Gaoshiti-Moxi Longwangmiao Formation are sorted out for measurements, and the ultrasonic and seismic attenuation are determined by using the spectral ratio method and the enhanced frequency shift method, respectively. When predicting the pore structure, we assume that the aspect ratio and volume fraction of pores and microcracks correspond to a normal distribution. On this basis, a model with the Voigt–Reuss–Hill average (VRH), differential effective medium (DEM) theory and infinituple-porosity media (IPM) theory is proposed. The acoustic wave responses in terms of reservoir porosity and standard deviation of normal distribution are analyzed, and multiscale 3D rock physics templates (RPT) are created. The calibrations of the templates are performed with the ultrasonic and seismic data, and then the templates are applied to the field data. The results show that the estimated porosity and pore structure (corresponding to the mean aspect ratio and standard deviation of a normal distribution, respectively) are in substantial agreement with the log data and the actual gas production results.</p></div>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":"181 7","pages":"2131 - 2147"},"PeriodicalIF":1.9,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141152104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}