-
Elimination of seismic characteristics of solid-filled in ultra-deep fractured-vuggy reservoirs Explor. Geophys. (IF 0.9) Pub Date : 2024-01-29 Xiangwen Li, Guosen Ji, Baozhu Guan, Zhongyuan Du, Chongyang Han, Qiyue Cheng
A large number of high-quality fractured-vuggy reservoirs (FVRs) are buried in ultra-deep (6500–9000 m) carbonate layers in the Tarim Basin, represented by the strong “beaded” reflection (SBR) on s...
-
Well log evaluation of the gas-bearing reservoirs in the Bombay offshore basin, Gulf of Cambay, western coast of India Explor. Geophys. (IF 0.9) Pub Date : 2024-01-24 Sikha Rani Mondal, Ranjana Ghosh, Maheswar Ojha, Saumen Maiti
Present study aims to locate potential reservoir zones in the Paleocene, Eocene and Oligocene sequences by analysing well log data of nine vertical wells in the exploration block MB-OSN-2004/1 in t...
-
Experimental study on various factors contributing to poor microtremor data processing results using ESAC method Explor. Geophys. (IF 0.9) Pub Date : 2024-01-24 Shuangcheng Ge, Gaoxiang Chen, Yonghui Zhao, Shufan Hu
In practical applications, microtremor data often encounter contamination from various sources of noise, leading to suboptimal processing outcomes. This study aimed to provide a comprehensive analy...
-
Quantitative measurement of the environmental disturbance caused by onshore seismic surveys Explor. Geophys. (IF 0.9) Pub Date : 2024-01-24 Tim Dean
Environmental impact assessments are a key component of the approval process for many onshore seismic surveys. Quantifying the environmental disturbance caused by such surveys is, however, problema...
-
Investigation of geothermal resources using a geophysical potential field in the Hurghada area, Egypt Explor. Geophys. (IF 0.9) Pub Date : 2024-01-24 Samah Elbarbary, Mohamed Abdel Zaher, Hossam Marzouk, Tarek Arafa-Hamed
Egypt's need for clean and renewable energy is pressing for numerous reasons, such as unpredictable fuel prices, diminishing fossil fuel resources, and growing concern about environmental degradati...
-
Application research of comprehensive geophysical prospecting in a typical slope of abandoned open-pit in Beijing, China Explor. Geophys. (IF 0.9) Pub Date : 2024-01-24 Lei Wang, Fei Li, Wei Wang, Chunyu Liu
New government policy in China has facilitated research on the hazards in open-pit mine slopes. Remote sensing, geological, geophysical, and computer simulation techniques have been applied to obta...
-
Unsupervised machine learning and depth clusters of Euler deconvolution of magnetic data: a new approach to imaging geological structures Explor. Geophys. (IF 0.9) Pub Date : 2024-01-04 Chibuzo Chukwu, Peter Betts, David Moore, Radhakrishna Munukutla, Robin Armit, Mark McLean, Lachlan Grose
We present a novel approach that determines the location and dip of geologic structures by clustering Euler deconvolution depth solutions using Density-Based Spatial Clustering Applications with No...
-
Seismic data interpolation via Unet with non-local blocks Explor. Geophys. (IF 0.9) Pub Date : 2023-12-11 Jiajia Cao, Lihua Fu, Wenqian Fang, Mengyi Wu
Due to the constraints of the exploration environment, acquired seismic data are commonly irregular or incomplete, which seriously affects the quality of subsequent seismic data processing and inte...
-
Introduction Explor. Geophys. (IF 0.9) Pub Date : 2023-12-12 Giovanni Leucci
Published in Exploration Geophysics (Vol. 55, No. 1, 2024)
-
Remote sensing campaign at the Roman Villa of Caddeddi on the Tellaro river (Noto, Italy) Explor. Geophys. (IF 0.9) Pub Date : 2023-12-12 D. Tanasi, R. Lanteri, S. Hassam, P. Trapani, D. Calderone, K. Kingsland, L. De Giorgi, I. Ferrari, G. Fragalá, F. Giuri, G. Leucci
The Villa of Caddeddi, in the territory of Noto (Siracusa) is located on the south bank of the Tellaro river, about 3 km from its mouth. The site, interpreted as a rural luxury residence dated to t...
-
Comparative 3D inversion of magnetotelluric phase tensors and impedances reveals electrically anisotropic base of Gawler Craton, South Australia Explor. Geophys. (IF 0.9) Pub Date : 2023-11-20 Kristina Tietze, Stephan Thiel, Kate Brand, Graham Heinson
Isotropic three-dimensional (3-D) inversion has become a standard tool in the interpretation of magnetotelluric (MT) data. 3-D anisotropic inversion codes are under development, yet the number of u...
-
Metasomatism and depletion of the southern Gawler Craton from combined mantle xenocryst and AusLAMP magnetotelluric data Explor. Geophys. (IF 0.9) Pub Date : 2023-11-20 Kate Selway, Sinan Özaydın, Justin Payne
Metasomatised mantle is considered a prerequisite for the formation of many major ore deposits. Since magnetotellurics (MT) is strongly sensitive to mantle metasomatism, MT is a useful tool for ana...
-
AusLAMP shines a light on space weather hazards in the Australian high-voltage power grid Explor. Geophys. (IF 0.9) Pub Date : 2023-11-14 Liejun Wang, Jingming Duan, Adrian P. Hitchman, Matthew G. Gard, Richard A. Marshall, Andrew M. Lewis, William V. Jones
A geomagnetic storm, also known as a geomagnetic disturbance (GMD), is a major disturbance of the Earth’s magnetic field caused by solar activity. A geomagnetic storm induces electric currents in t...
-
The resistive limit response of an ellipsoidal conductor: a magnetostatic formulation Explor. Geophys. (IF 0.9) Pub Date : 2023-11-10 Peter K. Fullagar
Interpreting transient electromagnetic (TEM) anomalies in terms of conductive rectangular plates is effective in many situations. However, not all conductors are thin and planar. Triaxial ellipsoid...
-
Numerical study on urban hidden geological hazard detection based on the semi-airborne transient electromagnetic method Explor. Geophys. (IF 0.9) Pub Date : 2023-09-18 He Li, Huake Cao, Xiu Li, Zhipeng Qi
As a relatively common geological disaster, ground collapse often occurs in urban areas. In view of the complex urban environment, and to effectively identify the areas with potential ground collap...
-
Compressed sensing reconstruction of sparse geophysical data: an example from regional magnetics Explor. Geophys. (IF 0.9) Pub Date : 2023-09-12 C.J. O’Neill
Reconstruction of discretely sampled geophysical data is generally done via gridding or interpolant algorithms. Such approaches typically consider local gradients which, while emphasising small-sca...
-
The Basilica of Santa Croce (Lecce- Italy): study the conservation state by ground-penetrating radar and electrical resistivity tomography Explor. Geophys. (IF 0.9) Pub Date : 2023-08-30 L. De Giorgi, F. Comisi, D. F. Barbolla, L. Longhitano, C. Torre, G. Leucci
In the field of the restoration of monumental heritage, non-destructive geophysical techniques have gained an already widely acknowledged importance. The possibility to understand the state of pres...
-
Characterisation of geological thin layer by borehole radar Explor. Geophys. (IF 0.9) Pub Date : 2023-08-27 Amarsaikhan Tsogtbaatar, Motoyuki Sato
To investigate a thin layer, we conducted borehole radar measurements at the GPR facility of Tohoku University, Japan. Both zero-offset profiling and tomography measurements were used to obtain wat...
-
A progressive data assimilation strategy in full-waveform adjoint tomography Explor. Geophys. (IF 0.9) Pub Date : 2023-08-24 Wenbin Jiang, Youyi Ruan
Elastic full-waveform inversion (FWI) is powerful in resolving fine-scale structures in complex models, but suffering from strong nonlinearity and slow convergence rate, especially in the presence ...
-
Integrated use of GIS and remote sensing techniques for landscape-scale archaeological analysis: the case study of Metaponto, Basilicata, Italy Explor. Geophys. (IF 0.9) Pub Date : 2023-08-19 Nicodemo Abate, D. Roubis, F. Sogliani, V. Vitale, M. Sileo, P. Arzu, R. Lasaponara, N. Masini
The study focuses on the integrated use of multiscale and multisensor remote sensing techniques and big data analysis for the identification of buried archaeological remains or areas of potential a...
-
The effects of relative position of anomalous body and topography on the semi-airborne transient electromagnetic survey Explor. Geophys. (IF 0.9) Pub Date : 2023-08-16 Yu Chuantao, Zhang Xi, Wu Xin, Tang Mingyu, Wang Zheng
The semi-airborne transient electromagnetic method using short-offset has the characteristics of high signal-to-noise ratio and large detection depth, which can adapt to environmental monitoring, groundwater mapping and metal survey in complex terrain. The terrain effects will modulate semi-airborne transient electromagnetic method response. Most terrains effects studies assume that the anomalous body
-
Application of audio-frequency magnetotelluric data to cover characterisation – validation against borehole petrophysics in the East Tennant region, Northern Australia Explor. Geophys. (IF 0.9) Pub Date : 2023-08-16 Wenping Jiang, Ian C. Roach, Michael P. Doublier, Jingming Duan, Anthony Schofield, Andrew Clark, Ross C. Brodie
The characterisation of the thickness and geology of cover sequences significantly improves targeting for mineral exploration in buried terrains. Audio-frequency Magnetotelluric (AMT) data is applicable to characterise cover sequences, where their conductivity (inverse resistivity) can be differentiated. We present a regional study from the under-cover East Tennant region in the Northern Territory
-
Density and magnetic susceptibility of major rock types within the Abitibi greenstone belt: a compilation with examples of its use in constraining inversion Explor. Geophys. (IF 0.9) Pub Date : 2023-08-01 Esmaeil Eshaghi, R. Vayavur, R. S. Smith, C. Mancuso, F. Della Justina, J. Ayer
Geophysical inversions give non-uniqueness solutions and unless constrained by appropriate initial values and geological constraints can give unrealistic results. One of the critical constraints ca...
-
Bayesian fusion of MT and AEM probabilistic models with geological data: examples from the eastern Gawler Craton, South Australia Explor. Geophys. (IF 0.9) Pub Date : 2023-07-20 Hoël Seillé, Stephan Thiel, Kate Brand, Shane Mulè, Gerhard Visser, Adrian Fabris, Tim Munday
When building 3D models of the subsurface, reconciling several geological and geophysical data of diverse nature, resolutions, coverage, or sensitivity, is challenging, both numerically and petrophysically. In this work, we propose a workflow for mapping selected geological features and characterise their uncertainty using a Bayesian Estimate Fusion algorithm. Different datasets such as 1D probabilistic
-
Direct hydrocarbon indicator analysis to predict reservoir in Deepwater Krishna-Godavari basin: a case study Explor. Geophys. (IF 0.9) Pub Date : 2023-07-20 Ashok Yadav, Samit Mondal, Jay Yadav, Shantanu Chakraborty
The amplitude Variations with Offset (AVO) technique is extensively used in hydrocarbon exploration and production for de-risking of the prospect before drilling. The interpretation of AVO results ...
-
Investigation of subsurface karst in an opencast mine in southwestern China via surface and cross-borehole electrical resistivity tomography Explor. Geophys. (IF 0.9) Pub Date : 2023-06-17 Rui Liu, Huaifeng Sun, Zhen Wang, Qiuyan Fan, Shangbin Liu, Jiuqing Lin, Yang Yang
Subsurface karst features are significantly developed in Guangxi Province, China. This area mainly contains fractured subsurface rock, abundant karst channels, and widely distributed underground fi...
-
Seismic random noise attenuation via a two-stage U-net with supervised attention Explor. Geophys. (IF 0.9) Pub Date : 2023-06-02 Yulan Yang, Lihua Fu, Kun Qian, Hongwei Li
Random noise, which has a significant impact on subsequent processing and interpretation, easily interferes with seismic data. Current convolutional neural networks (CNN) use a single-stage techniq...
-
Comparison of short-offset and long-offset grounded-wire transient electromagnetic responses based on the 3D model Explor. Geophys. (IF 0.9) Pub Date : 2023-05-30 Jianghao Chang, Junjie Xue, Yongshuai Guo, Hongchun Yi, Maofei Li
In this study, a recently developed time-domain electromagnetic method called the short-offset grounded-wire transient electromagnetic (SOTEM) method, which is a near-source observation method, was adopted to obtain strong signals and great detection depths. The responses of the SOTEM and long-offset transient electromagnetic (LOTEM) methods were compared to further guide and promote the SOTEM method
-
Electromagnetic and magnetic imaging of the Stillwater Complex, Montana, USA Explor. Geophys. (IF 0.9) Pub Date : 2023-05-26 Carol A. Finn, Michael Zientek, Benjamin R. Bloss, Heather Parks, Justin Modroo
Modelling and analysis of helicopter electromagnetic data result in resistivity and susceptibility models and derivatives of magnetic data that characterise shallow parts of the Stillwater Complex,...
-
3D tomographic inversion for frequency semi-airborne EM under multinary constraints Explor. Geophys. (IF 0.9) Pub Date : 2023-05-25 Xiaodong Luan, Michael Becken, Anneke Thiede, Philipp O. Kotowski
The semi-airborne electromagnetic method (SAEM) has recently gained increased interest in geophysical exploration applications. For SAEM, ground-based transmitters are deployed within the area of interest or in its vicinity, and the induced magnetic is measured airborne. Because of the large footprint of extended transmitters, three-dimensional (3D) effects can have a significant impact on the gathered
-
High resolution multi-methodological geophysical investigations to enhance the knowledge of Tusculum archaeological site (Roma, Italy) Explor. Geophys. (IF 0.9) Pub Date : 2023-05-21 S. Piro, V. Beolchini, L. Peña-Chocarro, A. Pizzo
To better understand the location and help in the conservation of buried structures in the ancient site of Tusculum, in Central Italy, archaeological and multi-methodological geophysical studies we...
-
Seismic forward modeling for investigating and interpreting thin beds in a carbonate reservoir in SW Iran Explor. Geophys. (IF 0.9) Pub Date : 2023-05-18 Maryam Sadat Mirkamali, Abdolrahim Javaherian, Hossein Hassani, Mohammad Reza Saberi, Sajjad Sarallah-Zabihi
High-frequency contents of reflections are essential in the investigation and interpretation of thin-bed reservoirs. These beds can be even more complicated in carbonate rocks, as pore geometries i...
-
Orthogonal dictionary learning based on l4-Norm maximisation for seismic data interpolation Explor. Geophys. (IF 0.9) Pub Date : 2023-05-18 Jingnan Yue, Lihua Fu, Xiao Niu, Wenqian Fang
Due to geological conditions, acquisition environment, and economic restrictions, acquired seismic data are often incomplete and irregularly distributed, and this affects subsequent migration imagi...
-
Estimating effective Q parameters from reflection seismic data using BPNN Explor. Geophys. (IF 0.9) Pub Date : 2023-05-18 Jizhong Wu, Ying Shi, Xiangguo Dong
The viscoelasticity of an underground medium will cause absorption and attenuation of seismic waves, resulting in energy attenuation and phase distortion. This absorption and attenuation is often quantified by the quality Factor Q. The strong attenuation effect resulting from geology is a challenging problem for high-resolution imaging. To compensate for the attenuation effect, it is necessary to estimate
-
Multiscale studies of electrical conductivity variations, Yerrida Basin, Capricorn Orogen, Western Australia: implications for geological mapping in sedimentary basins Explor. Geophys. (IF 0.9) Pub Date : 2023-05-14 Sasha Banaszczyk, Perla Piña-Varas, Mike Dentith, David Annetts
ABSTRACT The Yerrida Basin in the south-eastern Capricorn Orogen, WA is a Proterozoic sedimentary basin that is prospective for base metals. A regional TEMPEST airborne electromagnetics (AEM) survey over the Capricorn Orogen, coinciding magnetotelluric (MT) survey and available downhole electrical property measurements provide an opportunity to compare the electrical conductivity of the rocks, and
-
Integration of magnetic and geological field data into geological mapping and rutile mineralization targets in the Minta locality (Haute-Sanaga, Cameroon) Explor. Geophys. (IF 0.9) Pub Date : 2023-05-09 Salimatou Diallo, Mohamed Moustapha Ndam Njikam, Mbida Yem, Joseph Quentin Yene Atangana, Alessandra Ribodetti, Abdou Raouf
This study combines the processing and interpretation of magnetic data with geological fieldwork. The purpose is to establish the geological map and rutile mineralization targets map of Minta area ...
-
Study the conservation degree in wood structures using TDR and GPR techniques Explor. Geophys. (IF 0.9) Pub Date : 2023-05-07 L. De Giorgi, D. F. Barbolla, F. Comisi, C. Torre, G. Leucci
The condition of the wood structure and its components should be carefully recorded before considering any action. The diagnosis of wood structures in heritage should precede any intervention. It i...
-
Detection of potential hydrocarbon accumulations at Qaret El-Soda area, Western Desert, Egypt, based on airborne geophysical survey data Explor. Geophys. (IF 0.9) Pub Date : 2023-05-07 Atef M. Abu Donia, Reda A. Y. El-Qassas, Ali M. M. Mohamed
Airborne spectral gamma-ray survey data were processed using Th-normalization technique for oil and gas exploration in the Qaret El-Soda area, Western Desert of Egypt. This technique was applied to...
-
Three-dimensional inversion of airborne time-domain electromagnetic data for ground sources Explor. Geophys. (IF 0.9) Pub Date : 2023-04-21 Myeong-Jong Yi, Soocheol Jeong, Akira Johmori, Yutaka Sasaki
While most airborne time-domain electromagnetic (ATEM) surveys are carried out using moving-source systems, semi-airborne systems that use a ground-based source, such as GREATEM, have gained popularity in recent years because they allow for more in-depth exploration than moving-source systems. We presented a three-dimensional inversion method for interpreting transient data collected in semi-airborne
-
Combination of extended elastic impedance and rock physics templates for reservoir characterisation in Temblador field, Eastern Venezuela basin Explor. Geophys. (IF 0.9) Pub Date : 2023-04-03 Richard Perez-Roa, Mariana Rodriguez, Ilich Garcia
The Temblador Field is located on the southern flank of the Eastern Venezuela Basin. The Oficina Formation, present in the field, represents one of the most important producing Formations in the country. In this project, a detailed characterisation and delimitation of the sands of the Jobo and Morichal Members of the Oficina Formation. The work was outlined in three stages. The first stage consisted
-
Amplitude-balanced edge detection filters for potential field data Explor. Geophys. (IF 0.9) Pub Date : 2023-04-02 G. R. J. Cooper
Automatic gain control (AGC) filters are commonly applied to potential field data to produce images where both large and small amplitude features become prominent. These filters are usually based on ratios of the derivatives (or Hilbert transforms) of the data and are sensitive to noise as a result. By exploiting the fact that the data has an amplitude and phase component it is possible to produce
-
An optimized patch-point based approach for seismic fault interpretation using CNN Explor. Geophys. (IF 0.9) Pub Date : 2023-03-27 Patitapaban Palo, Aurobinda Routray
The interpretation of fault is essential for the oil and gas industries. This paper proposes an optimized patch-point-based approach for interpreting faults in a seismic data set using a convolutional neural network (CNN). We extract small patches of data for training and identify the fault patches. Next, we separately train seismic data points that are previously labeled as fault or non-fault. The
-
GPR investigations at San Nicolò Church: a case-study from the 1669 eruption in the old settlement of Misterbianco (Etna, Sicily) Explor. Geophys. (IF 0.9) Pub Date : 2023-03-21 C. Bottari, P. Capizzi, R. Martorana, R. Civico, A. Canzoneri
Misterbianco, located on the southern slope of Mt. Etna (eastern Sicily), was destroyed in the past by two catastrophic events that raised the old town to the ground. The first was the great erupti...
-
A processing for ocean-bottom multicomponent data with seismic interferometry: a case study of southern offshore in Korea Explor. Geophys. (IF 0.9) Pub Date : 2023-03-20 Jeongmin Yu, Byoung-Yeop Kim, Yonghwan Joo
Marine seismic surveys are widely used to explore oil and gas resources and monitor CO2 storage. In particular, ocean-bottom seismic surveys allow the acquisition of high-quality data without the influence of the water-layer environment. However, ocean-bottom seismic surveys are more expensive than streamer surveys and P-wave survey data exhibit free-surface multiples, which are persistent problems
-
Multi-capacitance electric relaxation model for complex electrical conductivity of sulphide ores Explor. Geophys. (IF 0.9) Pub Date : 2023-03-17 Yusuke Ohta, Tada-nori Goto, Koki Kashiwaya, Katsuaki Koike
ABSTRACT Many studies have been conducted to analyse dielectric polarisation and the complex electrical conductivity characteristics by the Cole–Cole type relaxation approximating rocks with a uniform material. That method has revealed the correlation between metal contents and chargeability, between the central relaxation time and the metallic particle size, and so on. Based on the model’s success
-
Assessing combined analysis of electrical resistivity tomography and multichannel analysis of surface waves for ground improvement assessment near by-pass road, Silchar, Assam Explor. Geophys. (IF 0.9) Pub Date : 2023-03-16 Arindam Saha, Ashim Kanti Dey
Soft clayey soils are generally improved by the consolidation process. The different improvement techniques which are in vogue include the use of stone columns, sand drains with and without preload and prefabricated vertical drains. Upon improvement, the soft soil attains a higher strength and better resistance to excessive settlement. The extent of this improvement of the soft soil is measured through
-
Concurrent elastic inversion of Rayleigh and body waves with interleaved envelope-based and waveform-based misfit functions Explor. Geophys. (IF 0.9) Pub Date : 2023-02-28 Li Ren, George A. McMechan, Peng Guo
Rayleigh and body waves are both solutions of the same propagation equation, but correspond to different wavenumber regions and boundary conditions, so their interaction with the elastic parameters (Vp, Vs and density) provides independent constraints during inversion. We develop and illustrate concurrent, elastic, full-waveform inversion of P and S body- and Rayleigh-waves using interleaved envelope-
-
Enhanced detectability using differential fields for marine controlled-source EM data in shallow waters Explor. Geophys. (IF 0.9) Pub Date : 2023-02-21 Gang Li, Wen Lei, Chaofan Li, Linjiang Qin
ABSTRACT In shallow waters, the interpretation of the frequency-domain marine controlled-source electromagnetic (CSEM) data is challenging due to the airwave. The airwave dominates and will lead to misinterpretation of the data set. A differential-field approach is presented to attenuate the airwave for the shallow-water marine CSEM data. The difference of the fields between two consecutive receivers
-
Evaluating uncertainty in empirically derived unconfined compressive strength (UCS) estimates and implications for drilling applications; a case study from the Cooper Basin Explor. Geophys. (IF 0.9) Pub Date : 2023-01-17 Matthew Musolino, Simon Holford, Rosalind King, Richard Hillis
Accurate estimates of Unconfined Compressive Strength (UCS) are essential for a range of subsurface applications, including drilling wells for subsurface fluid extraction or injection. However, measuring UCS of subsurface rock samples through laboratory-based uniaxial and triaxial testing is time consuming, expensive, and potentially subject to individual sample variance. P-wave velocity logs are routinely
-
Fast 3D “wave-consistent” ray tomography based on a polynomial representation of a model Explor. Geophys. (IF 0.9) Pub Date : 2023-01-16 Maxim Protasov, Dmitry Neklyudov
In the paper, we describe an original 3D travel-time tomography approach. It is based on the new realization of the bending method which to some extent takes into account the band-limited nature of real seismic signals propagation. As a result, two-point ray tracing provides more reliable ray trajectories and travel times in complex media. Another original feature of the proposed tomography is that
-
Modelling the electromagnetic response of a sphere located in a layered earth Explor. Geophys. (IF 0.9) Pub Date : 2023-01-09 Marc A. Vallée, Mouhamed Moussaoui
Estimating the electromagnetic response of a conductive sphere in a layered earth is of great interest in terms of both modelling and interpretating data acquired via geophysical electromagnetic methods where the target is at some distance from the source and receiver. This is particularly the case when using Airborne Electromagnetic Method (AEM) where the source and receiver are located at some height
-
Application of model-based acoustic impedance inversion in the prediction of thin interbedded coal seams: a case study in the Yuwang colliery, Yunnan Province Explor. Geophys. (IF 0.9) Pub Date : 2022-12-12 Meijiao Wang, Yanhai Liu, Guangui Zou, Deliang Teng, Jiasheng She
The Permian coal seams in eastern Yunnan and western Guizhou are thin, numerous, and staggered with other thin coal seams. Depicting the fine characteristics of coal reservoirs is pivotal for the safe and efficient exploitation of coal and coalbed methane (CBM), and is important for transparent mining. To improve the inverse resolution and accuracy of predicting reservoir thickness, this study used
-
Synthetic magnetotelluric modelling of a regional fault network – implications for survey design and interpretation Explor. Geophys. (IF 0.9) Pub Date : 2022-12-05 Alison Kirkby, Michael P. Doublier
The magnetotelluric (MT) method is increasingly being applied to mineral exploration under cover with several case studies showing that mineral systems can be imaged from the lower crust to the near surface. Driven by this success, the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) is delivering long-period data on a 0.5° grid across Australia, and derived continental scale
-
Seismic multi-attribute approach using visual saliency for subtle fault visualization Explor. Geophys. (IF 0.9) Pub Date : 2022-11-23 Gagandeep Singh, Rahul Mahadik, William K. Mohanty, Aurobinda Routray, Deepan Datta, Sanket Smarak Panda
This study improves a collection of attributes to detect subtle faults in three dimensional data obtained from the Krishna-Godavari (KG) basin, with results displayed on synthetic and real datasets. Seismic attributes, for instance, curvature and coherence, are often used to delineate discontinuities, such as faults and fractures where hydrocarbons may have been trapped. These attributes have their
-
Effects of different pore shapes on the pressure and frequency dependence of velocities of oil-saturated tight sandstone Explor. Geophys. (IF 0.9) Pub Date : 2022-11-14 Xu Han, Genyang Tang, Shangxu Wang, Yanxiao He, Tao Liu, Yi Han
The pressure dependence of elastic parameters of rocks is mainly controlled by the geometry of the pore space. In general, the compliant-stiff pore structure model can be used to reasonably describe this pressure dependence. However, our experiment measurements revealed that for tight sandstone rock with complex pore structures, the contribution of the compressibility of the stiff pores to the elastic
-
Enhanced data fidelity after ground roll attenuation using conditional standard deviation clustering obtained from the GARCH model Explor. Geophys. (IF 0.9) Pub Date : 2022-11-08 Mohammad Amin Aminian, Mohammad Ali Riahi
ABSTRACT The main purpose of this research is to evaluate the effectiveness of coherent noise clustering in reconstructing leaked signals after conventional noise attenuation filters. We use Generalised Auto Regressive Conditional Heteroskedasticity (GARCH) model. We apply clustering, conditional variance, and conditional standard deviation analysis to synthetic and experimental seismic field data
-
Cross-validation of time-depth conversion and evaluation of different approaches in the Mesopotamian Basin, Iraq Explor. Geophys. (IF 0.9) Pub Date : 2022-11-07 Omar N. A. Al-Khazraji
The time-depth conversion process is a significant task in seismic interpretation to establish the link between geophysical information in the time domain and geological information in the depth domain at/away from well locations. Selecting the suitable velocity model for time-depth conversion to generate an accurate depth map is difficult if the accuracy of these models is unknown. In the current
-
Random noise attenuation using the novel Estimated Noise Pattern Denoising Algorithm Explor. Geophys. (IF 0.9) Pub Date : 2022-11-07 Mohammad Iranimehr, Mohammad Ali Riahi, Alireza Goudarzi
This paper introduces the estimated pattern denoising (EPD) wavelet transform for random noise attenuation in geophysical data. The proposed approach combines the capability of the Gaussian filter and dual-tree rational dilation wavelet transform (DT-RADWT) in random noise detection and suppression; we called this method Estimated Pattern Denoising (EPD). The EPD is an innovative approach in terms
-
Analysis of subsurface velocity using CMP gathers picked up by unshielded GPR system: results from an experimental NAPL contaminated test site Explor. Geophys. (IF 0.9) Pub Date : 2022-11-04 Ibrar Iqbal, Bin Xiong, Gang Tian, Yuguo Lu, Yang Yang
Adequate knowledge of velocity is required for accurate data imaging and depth conversion, as well as for quantifying the distribution of soil water content. Without complementary borehole information in the form of dielectric permittivity and/or porosity logs along the profile, it is currently impossible to reliably estimate the high-frequency electromagnetic velocity distribution in the probed subsurface
-
Geophysical studies around abu gharadig basin, North Western desert, Egypt Explor. Geophys. (IF 0.9) Pub Date : 2022-09-21 Belal Mohamed Abdelhamed, Sultan Awad Sultan Araffa, Tharwat Abdelhafeez
The current study aims to determine the basement configuration and basement-related structural elements of the Abu Gharadig basin.: We delineated subsurface features that affect the configuration of reservoirs in the study area using an integrated interpretation of potential field and seismic reflection data. The study area lies in the North-Western Desert of Egypt to the east of the Qattara Depression