Article
Geochemistry & Geophysics
Yongchae Cho, Carlos Perez Solano, John Kimbro, Yi Yang, Rene-Edouard Plessix, Kenneth Matson
Summary: Elastic full-waveform inversion is crucial in building velocity models, especially in areas with large salt bodies. It helps reduce artifacts caused by using acoustic approximation, but defining the initial shear velocity model remains challenging. By utilizing reflected converted waves from the top of salt interface, we can improve the estimation of background shear velocity, and combining wave-equation traveltime inversion with FWI yields higher-resolution results.
Article
Geochemistry & Geophysics
Roberto Miele, Bernardo Viola Barreto, Paula Yamada, Luiz Eduardo S. Varella, Anderson L. Pimentel, Joao Felipe Costa, Leonardo Azevedo
Summary: Geostatistical seismic rock physics AVA inversion predicts rock and fluid properties iteratively by updating the rock physics model, overcoming limitations of calibration and well-log data.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geosciences, Multidisciplinary
Zhiqi Guo, Xueying Wang, Jian Jiao, Haifeng Chen
Summary: A rock physics model was established to calculate the P-wave velocity dispersion and attenuation caused by the squirt flow of fluids in gas hydrate-bearing sediments. Seismic modeling results show the impact of gas hydrate saturation on reflection responses under different modes, indicating notable changes in seismic responses with increasing gas hydrate saturation.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Marta Cyz, Leonardo Azevedo
Summary: The purpose of seismic reservoir characterization is to predict the spatial distribution of subsurface rock properties from a set of measurements. This is commonly achieved through a two-step process involving inversion of elastic properties from seismic reflection data and computation of rock properties volumes using calibrated rock physics models. The proposed iterative geostatistical shale rock physics seismic AVA inversion method aims to directly invert seismic reflection data for shale rock properties.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Muhammad Kamal, Aamir Ali, Yawar Amin, Asam Farid, Bakhtawar Sarosh
Summary: This study aims to enhance the vertical and horizontal resolution of the Bottom Simulating Reflector (BSR) in Makran offshore region through the application of advanced processing techniques, addressing the complex geology resulting from subduction zone. The workflow includes preserving true amplitudes, processing source de-signature by inverting direct arrivals, model-based noise attenuation, high resolution velocity analysis, and pre-stack time migration. The results show significant improvement in BSR resolution with high signal to noise ratio compared to standard industry algorithms. Vertical resolution is achieved by direct arrival inversion, while horizontal resolution is achieved by selecting an optimum migration algorithm and velocity model. These results have significant implications for gas hydrate exploitation in offshore areas globally.
PURE AND APPLIED GEOPHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Hemin Yuan, Yun Wang, Xiangchun Wang
Summary: This work reviews the roles of seismic and rock physics in gas hydrate exploration and production, summarizing commonly used seismic techniques, rock physics models, and production methods. The study outlines the workflow for identifying gas hydrate formations, linking micro-scale properties to macro-scale seismic velocities, and addresses potential uncertainties. It also discusses problems in gas hydrate production and suggests using geophysical techniques to solve exploration and production challenges.
JOURNAL OF EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Pan HaoJie, Li YongGen, Wei Chao, Gui ZhiXian, Li XiaoMing, Zhang Xiang, Zhao Yi, Zhang Wei
Summary: Due to the complex hydrate morphologies, existing models cannot accurately describe hydrate reservoirs. We establish a rock physics model considering multiple hydrate morphologies to improve the accuracy of hydrate saturation estimate. Numerical simulation and experimental validation show that the model can capture acoustic responses of hydrate samples and reveal hydrate occurrence mechanism and evolution pattern.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2022)
Article
Geosciences, Multidisciplinary
Linfei Wang, Huaishan Liu, Zhong Wang, Jin Zhang, Lei Xing, Yanxin Yin
Summary: Marine vertical cable seismic (VCS) is a promising survey technique for imaging submarine complex structures and exploring natural gas hydrates. By utilizing a distributed VCS system and air-gun sources, high-resolution images can be obtained for marine sediments.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Lingqian Wang, Hui Zhou, Hengchang Dai, Bo Yu, Wenling Liu, Ning Wang
Summary: Seismic inversion is a severely ill-posed problem, but regularization techniques can impose certain characteristics on inversion results to obtain a stable and unique solution. The newly developed acoustic impedance inversion method based on a patch-based Gaussian mixture model (GMM) provides more impedance structure details and enhances the stability of the inversion result.
Article
Chemistry, Multidisciplinary
Gulbahar Yazmyradova, Nik Nur Anis Amalina Nik Mohd Hassan, Nur Farhana Salleh, Maman Hermana, Hassan Soleimani
Summary: The integrated approach of rock physics analysis, pre-stack seismic inversion, and artificial neural network successfully delineates the hydrocarbon potential in HPHT zone of the Malay Basin, recognizing and predicting reservoir rock and fluid properties.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Ashok Yadav, Soumya Ranjan Nayak, Samit Mondal
Summary: The proposed method introduces a clustering technique to group prior pseudo-wells based on the shape of their volume of shale logs before matching to seismic data, improving resolution and reducing computation time effectively.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Song-He Yu, Zhao-Yun Zong, Xing-Yao Yin, Kun Lang, Fu-Bin Chen
Summary: The study proposes a new method for direct TOC prediction using a rock physics model, combining elastic parameter inversions and Gray's approximation. The feasibility and stability of this approach are validated through synthetic examples and field tests.
Article
Geosciences, Multidisciplinary
Vanessa Monteleone, Hector Marin-Moreno, Gaye Bayrakci, Angus Best, Farhana Shaon, Mohammad Moinul Hossain, Ahmad Al Karim, Md Khurshed Alam
Summary: This study investigates the gas hydrate potential in the offshore Bangladesh, providing evidence for the first occurrence of natural gas hydrate in the area through analysis of seismic reflection profiles and modeling of the gas hydrate stability zone. The research reveals high amplitude reflections, Bottom Simulating Reflectors, and other features related to gas hydrate in the region.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Oceanography
Wei Deng, Zenggui Kuang, Jinqiang Liang, Yan Pin, Jingan Lu, Miaomiao Meng
Summary: Understanding gas chimney and fluid migrations is crucial for studying gas hydrate accumulation globally. This study identified two types of gas chimneys with different fluid migration mechanisms. Quantitative evidence from core-well logging and seismic analysis revealed their characteristics and distribution, offering insights into fluid migration related to gas chimneys worldwide.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Geosciences, Multidisciplinary
Gabrielle M. Varona, Peter B. Flemings, Alexey Portnov
Summary: We used integrated well and seismic data to interpret the stratigraphic architecture and paleogeographic evolution of two hydrate-bearing sand reservoirs in the deep-water Gulf of Mexico's Terrebonne Basin. The sands were deposited in the final stage of ponded fill in the basin. The Green sand formed as a perched apron coinciding with downstream erosion and sediment bypass, while the Orange sand was deposited as a second perched apron. The Green and Orange sands are connected regional aquifers that captured and focused gas migration, making them potentially favorable for hydrate production.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shaoyun Chen, Yongqiang Yang, Longwei Qiu, Xiaojuan Wang, Erejep Habilaxim
Summary: Quartz cement is an important authigenic mineral in the tight sandstones of the Shaximiao Formation in the Sichuan Basin. This study analyzed the silicon sources of the quartz cement using mineralogical, fluid inclusion, and geochemical data. The results showed that smectite alteration and dissolution of aluminosilicate minerals were the primary sources of silicon for quartz cementation. Contributions from volcanic material hydrolysis and pressure solution were relatively minor. The presence of chlorite films inhibited the development of quartz overgrowths and had minimal impact on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xing Jian, Ping Guan, Ling Fu, Wei Zhang, Xiaotian Shen, Hanjing Fu, Ling Wang
Summary: This study presents a synthesis of new detrital zircon dating results and published data from the Cenozoic Qaidam basin, revealing the spatiotemporal variation of detrital zircon age populations and supporting models of synchronous deformation in northern Tibet. The study emphasizes the importance of considering textural and sedimentological parameters in zircon provenance interpretations, as well as the need for integrated provenance analysis involving other detritus components.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Rafaella de Carvalho Antunes, Julia Campos Guerrero, Ricardo Jorge Jahnert
Summary: This study presents a detailed sedimentary model and identifies various sedimentary facies associations in the coquina deposits of the Itapema Formation in the offshore pre-salt Buzios Field of the Santos Basin. These facies associations were primarily influenced by waves and currents and reflect a complex depositional system.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xiaocan Yu, Chunlian Wang, Hua Huang, Kai Yan
Summary: Oilfield brines are a significant alternative lithium resource. This study investigates the metallogenic characteristics and enrichment process of oilfield brines from the Jianghan Basin, central China using chemical and multi-isotope data. The results suggest that lithium enrichment in these brines is the result of interaction with clastic host rocks and dilution by meteoric water.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Jianghao Qiao, Xiwu Luan, Thanuja D. Raveendrasinghe, Yintao Lu, Guozhang Fan, Xinyuan Wei, Long Jin, Jian Yin, Haozhe Ma, Lushan Jiang
Summary: This study investigates the Tanintharyi passive continental margin in the Andaman Sea and reveals the potential of the Oligocene/Early Miocene carbonate platform in the region as a significant hydrocarbon reservoir. It also examines the influence of changes in sedimentary facies and the tectonic setting of the Andaman Sea on the evolution of pockmarks.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)