Marine and Petroleum Geology最新文献

{"title":"Seismic stratigraphic analysis of the Pre-salt of Berbigão, Sururu, and Atapu fields, Santos Basin, Brazil","authors":"Victor Haas Pizarro ,&nbsp;Fábio André Perosi ,&nbsp;Leonardo Borghi ,&nbsp;Marcos Fetter","doi":"10.1016/j.marpetgeo.2025.107529","DOIUrl":"10.1016/j.marpetgeo.2025.107529","url":null,"abstract":"<div><div>The Pre-salt section of Santos Basin, formed during the Lower Cretaceous, hosts one of the world's most significant hydrocarbon provinces, yet its complex carbonate reservoirs are yet to be fully understood. This study consists of a seismic analysis and interpretation of the Pre-salt interval of Berbigão, Sururu, and Atapu fields, focusing on the Upper Barra Velha Formation. A 3D seismic volume and sixteen wells were analyzed. At the Pre-salt level, five seismic units were defined. Distinct seismic facies were described and mapped throughout the Sag unit. These seismic facies were analyzed for occurrence patterns and incorporated with data from lithofacies and electrofacies. It was concluded that seismic facies Parallel corresponds to carbonate platforms principally composed of spherulitestone and mudstone variations and developed in both high- and low-energy sublittoral lake zones. Seismic facies Divergent Wedge and Fill represent profundal sediments deposited in deeper portions of the lake, where a higher concentration of organic-rich shales and mudstones would occur. This element is often associated with syndepositional faulting in the Sag unit. Seismic facies Mound represents carbonate mounds predominantly composed of shrubstone variations and shrubby spherulitestones. They occur along deep-seated faults and contain conspicuous amounts of silica and uranium. Mounds likely formed in intermediate to shallow sublittoral zones, being occasionally subjected to subaerial exposure. The formation and enrichment of these carbonate mounds are likely associated with hydrothermal processes, where faults would have acted as conduits for the percolation of hydrothermal fluids. Significant concentrations of shrubs in the Upper Barra Velha Formation are probably related to carbonate precipitation from hydrothermal fluids. The interpretations derived from this integrated study provide new insights into reservoir heterogeneity in the Upper Barra Velha, with direct implications for reservoir prediction, well placement, and production optimization in similar Pre-salt settings.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"182 ","pages":"Article 107529"},"PeriodicalIF":3.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Damage-integrated fracture prediction model for multi-stage fracture in deep carbonates: Application to the A Oilfield, Northern Tarim Basin","authors":"He Du ,&nbsp;Huilin Xing ,&nbsp;Jianwei Feng ,&nbsp;Shouyu Xu","doi":"10.1016/j.marpetgeo.2025.107599","DOIUrl":"10.1016/j.marpetgeo.2025.107599","url":null,"abstract":"<div><div>The deeply buried Ordovician carbonates in the Tarim Basin exhibit complex fracture superposition due to polyphase tectonics, challenging prediction due to sparse well data and deep reservoir heterogeneity. This study presents an innovative fracture prediction framework for deep carbonates by integrating damage deformation mechanisms. A confining pressure-dependent fracture predictive model was established via triaxial tests, acoustic emission monitoring, and modified Mohr–Coulomb criteria, explicitly incorporating damage deformation effects on fracture parameters. Through failure tests and numerical simulation on pre-fractured rock samples, a multi-stage fracture superposition algorithm was established to account for fracture accumulation from distinct tectonic events, applied to the A Oilfield in the Northern Tarim Basin for practical validation. By commencing with detailed fault interpretation in the A Oilfield, we reconstructed tectonic evolution characteristics and identified three major fracture-forming periods through integrated analysis. By integrating rock mechanics experiments, logging data, and seismic data, geomechanical models corresponding to different tectonic phases were constructed were constructed and utilized in stress field simulations, enabling dynamic integration of multi-stage stress field simulations and fracture parameter superposition analysis. The model predicts fracture linear density (0.1–1.5 m^-1) and aperture (0.5–2.75 mm) with 80 % consistency with FMI interpretations, outperforming traditional brittle models. For the A Oilfield, the results of fracture prediction directly guide the identification of high-potential exploration zones, as well as the evaluation of effective reservoirs. This study provides a mechanistic approach for deep carbonate fracture prediction, aiming to address the limitations of traditional models that overlook confining pressure effects and damage deformation. This approach not only enhances reservoir description accuracy in the A Oilfield but also offers a practical reference for similar deep carbonate basins worldwide.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"182 ","pages":"Article 107599"},"PeriodicalIF":3.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Depositional conditions affecting proximal to distal variation in the crystallo-chemical properties of Paleogene glauconites: Example from the Mesopotamian basin, Iraq","authors":"Tarang Sarin ,&nbsp;Santanu Banerjee ,&nbsp;Ibrahim Q. Mohammed ,&nbsp;Nibras Zaki ,&nbsp;Sherif Farouk ,&nbsp;Howri Mansurbeg ,&nbsp;Pragya Singh","doi":"10.1016/j.marpetgeo.2025.107591","DOIUrl":"10.1016/j.marpetgeo.2025.107591","url":null,"abstract":"<div><div>The proximal to distal variation in glauconite composition across a basin, although rarely attempted, may provide crucial insights into the depositional conditions. The Paleogene glauconites from the transgressive and condensed deposits are tracked from the proximal to the distal parts of the Mesopotamian basin in Iraq, to delineate their compositional variation. They prevail within the Paleocene Upper Aaliji Formation and the Eocene basal Jaddala Formation. The Fe₂O₃(total) (av. 16.78 wt%) and K₂O (av. 7.04 wt%) contents, and the ordering of the crystal structure and maturity (decreasing d-spacing and FWHM of 001 basal reflection) of glauconites increase, while the Al₂O₃ (av. 9.82 wt%) and MgO (av. 5.24 wt%) contents decrease from the proximal to distal settings. Therefore, the Al-rich and less mature glauconite is attributed to the proximal setting, whereas Fe-rich and more mature glauconites are attributed to the central and distal settings. The proximal setting is enriched with detrital Al-rich clay minerals forming less mature, Al-rich glauconites in kaolinite and illite-smectite precursors within the prevailing gently suboxic conditions. Whereas the central and distal settings sustain a lower sedimentation rate and enhanced mobility of ferrous ions, forming more mature, Fe-rich glauconites within the prevailing oxygen-depleted conditions. Glauconites form within two warming intervals from Late Danian to Late Ypresian and Late Lutetian to Late Bartonian. Warm climatic conditions amplify elemental supply, promote transgressive conditions, intensify reaction kinetics, and produce redox conditions encouraging abundant growth of glauconite. The composition and abundance of glauconites corroborate their formation within warm climatic conditions.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"182 ","pages":"Article 107591"},"PeriodicalIF":3.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentology, stratigraphy and reservoir architecture of the Lower Triassic Main Buntsandstein in the Roer Valley Graben, the Netherlands","authors":"E. Cecchetti ,&nbsp;A.W. Martinius ,&nbsp;M. Felder ,&nbsp;M.E. Donselaar ,&nbsp;H.A. Abels","doi":"10.1016/j.marpetgeo.2025.107519","DOIUrl":"10.1016/j.marpetgeo.2025.107519","url":null,"abstract":"<div><div>The Main Buntsandstein Subgroup in the Roer Valley Graben in the southern Dutch subsurface is a sand-prone sedimentary interval deposited in a fluvial-aeolian environment, and is currently investigated for its suitability as target for low-entalpy geothermal exploration. The current depositional models in the Roer Valley Graben do not fully address the facies heterogeneities within and between Buntsandstein sedimentary units and their impact on the prediction of reservoir architecture. A detailed analysis of the Main Buntsandstein sedimentary facies heterogeneities to de-risk future sustainable energy operations is therefore crucial. In the present study, the sedimentology and lithostratigraphy of the Buntsandstein are assessed in a multidisciplinary analysis by use of a subsurface dataset composed of well cores, gamma-ray logs, and thin section data.</div><div>The deposition of the Main Buntsandstein sediments in the Roer Valley Graben is dominated by different fluvial processes, with minor aeolian reworking. River planform style evolved through geological time from highly mobile and ephemeral to more perennial in nature. These changes in river style seem to be dictated by a decrease in climatic aridity along with a decrease in tectonic activity.</div><div>The depositional processes resulted in the development of six lithofacies associations, developing three different types of reservoir architectures with their own set of heterogeneities at different spatial scales. Amalgamated, stacked sandstones have the highest net-to-gross (N/G) with a high degree of lateral and vertical connectivity, and the highest average porosity and permeability. Compensational-stacked sandstone reservoirs have a lower N/G and are the most heterogeneous due to the frequent occurrence of cemented intervals as well as mud drapes in the sandstone bodies. Marginal isolated sandstones show a well preserved relationship between reservoir properties and depositional facies, while more data are needed to resolve the spatial connectivity and lateral continuity of these sandstone bodies.</div><div>The results of this study enhance the understanding of Lower Triassic reservoir architecture and sedimentary heterogeneities in the Roer Valley Graben that can be applied well beyond the area and provide a solid basis for future investigation of the relationship between sedimentary facies, diagenesis, and reservoir quality.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"182 ","pages":"Article 107519"},"PeriodicalIF":3.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of burrows on electrical resistivity: Example from the Jurassic Hanifa Formation, Saudi Arabia","authors":"Ahmed Nagy ,&nbsp;Hassan A. Eltom ,&nbsp;Ammar El-Husseiny ,&nbsp;John D. Humphrey ,&nbsp;Mohammed Al Hamad","doi":"10.1016/j.marpetgeo.2025.107497","DOIUrl":"10.1016/j.marpetgeo.2025.107497","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Although the influence of burrows on porosity and permeability is well documented, their impact on electrical properties remains poorly understood. The study addresses this gap by employing an integrated methodology, focusing primarily on high-resolution imaging to facilitate digital rock analysis, and customized resistivity setups developed for analyzing 4-inch diameter core samples from the Hanifa Formation in central Saudi Arabia. The setups allow for detailed analysis of the cores on a 4-inch diameter scale, alongside field observations, petrography, and petrophysical measurements. The primary objective is to test the hypothesis that the resistivity of sedimentary strata characterized by passively filled burrows varies inversely with the percentage and connectivity of burrows, particularly where the burrows are connected along the core from bottom to top. CT scans provided detailed insights into burrow connectivity and pore structures within the burrow fillings, enabling quantification of burrow percentages. Surprisingly, the burrow percentage exhibited a strong positive correlation with bulk resistivity measurements (p-value &lt;0.05, r&lt;sup&gt;2&lt;/sup&gt; = 0.98), contradicting the initial expectation that increasing burrow percentages, resulting in connected burrow networks saturated with brine, would lead to reduced resistivity. Further investigation with high-resolution radial resistivity measurements at a centimeter scale revealed a similar positive correlation between resistivity and burrow percentage (p-value &lt;0.05, r&lt;sup&gt;2&lt;/sup&gt; = 0.86). To explain these unexpected results, petrographic analysis and CT imaging were used to examine the rock texture of the studied cores. Micro CT scans revealed that what appeared to be connected interparticle and moldic pores in the petrographic data were, in fact, isolated in three dimensions, preventing the formation of permeability pathways within the burrow fillings. As a result, the burrow networks did not hold connected fluid phase or contribute to electrical current transmission, likely explaining the positive correlation between burrow percentage and resistivity. Further core flooding results confirm what has been observed in CT scan data by yielding very low permeability (∼3 mD) in cores with a connected burrow network. Additionally, porosity measurements indicated that the surrounding burrow matrix is highly porous, with microporosity accounting for more than 70 % of total porosity. The microporosity acted as the primary conductor of electrical current, creating a short-circuiting effect that dominated the resistivity readings. The study suggests that for burrows to affect resistivity inversely, they must be both connected and permeable. When burrows do not form permeability pathways in a microporous matrix, resistivity may vary proportionally with their presence. These findings provide valuable insights into the relationship between burrows and electrical resistivity in sedimentary stra","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"181 ","pages":"Article 107497"},"PeriodicalIF":3.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mercury in source rocks on the Norwegian Continental Shelf; link to maturity, depositional environment and age","authors":"Sverre E. Ohm ,&nbsp;Guro Skarstein ,&nbsp;Tomas Naeraa ,&nbsp;Fridtjof Riis ,&nbsp;Alejandro Escalona","doi":"10.1016/j.marpetgeo.2025.107511","DOIUrl":"10.1016/j.marpetgeo.2025.107511","url":null,"abstract":"<div><div>The source of mercury (Hg) in petroleum is debated in the literature and could stem from; Hg rich black shales producing petroleum, coals, proximity to deep faults acting as migration routes from deep Hg sources, and proximity to large igneous provinces. In an attempt to cast light on the source of Hg in oils on the Norwegian Shelf 268 mainly organic rich core samples from wells in the North Sea, Norwegian and Barents Sea were analysed for Hg and other heavy metals. In addition 5 core samples from Devonian and Permian reservoir sands and 6 oils from the Embla field were analysed. Our study shows that sediments with elevated Hg concentrations are associated with anoxic depositional environments. The study also show that Hg is mobilized in the source rock at the same temperature interval that generates oil and that the concentration of Hg in the source rock decreases with expulsion of oil. It is suggested that Hg in oil may carry information about the origin of the oil; source rock type and age.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"181 ","pages":"Article 107511"},"PeriodicalIF":3.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A sequence boundary related aeolian sand record in a continental basin: The Cretaceous-Paleogene White Sandstone Member, Tabei Uplift, Tarim Basin, NW China","authors":"Xiaoyang Gao ,&nbsp;Luxing Dou ,&nbsp;Wenxiang He ,&nbsp;Qi Sun ,&nbsp;Zhenli Yi ,&nbsp;Bin Li ,&nbsp;Qiaolin He ,&nbsp;Jineng Jin ,&nbsp;Yong Hu ,&nbsp;Jingwen Yan ,&nbsp;Li Zhang","doi":"10.1016/j.marpetgeo.2025.107514","DOIUrl":"10.1016/j.marpetgeo.2025.107514","url":null,"abstract":"<div><div>A sequence boundary typically corresponds to an unconformity, with fluvial incised-valley fills representing a classic depositional model. However, aeolian deposits associated with sequence boundaries, though equally significant, have received less attention in studies of continental basins. Therefore, this study investigates aeolian sand sedimentary records near a sequence boundary in a continental basin based on an integrated analysis of 3D seismic volumes, wireline logs and cores from the Cretaceous-Paleogene deposits in the Tabei Uplift (Tarim Basin, NW China). The Cretaceous-Paleogene White Sandstone Member was formed in a salt-lake margin desert environment above a local unconformity surface that is well recognized on seismic profiles. The studied sandstone sequence is characterized by its friable texture and exhibits distinctive aeolian depositional features, including developed grainfall strata and grainflow strata within the core samples. Scanning electron microscopy (SEM) analysis reveals the presence of abundant dish-shaped impact pits on quartz grain surfaces, providing compelling evidence for the aeolian origin of these sandstones. During the Late Cretaceous to Paleogene period, the study area underwent significant geomorphological changes due to the tectonic uplift of the Tianshan and Kunlun Orogenic Belts. This tectonic activity resulted in the progressive erosion of Cretaceous strata in both the northwestern and southeastern regions of the research area. During this period, with regression of the Tarim Sea, aridity gradually increased, leading to the formation of extensive aeolian sands in the area. The aeolian sandstone pinches out from the southeast to the northwest in the area east of the WM7 fault belt. In the Paleogene, incised valleys were developed and transported eroded aeolian sands to the salt lake in the northwest. This study demonstrates the transformation of Cretaceous-Paleogene aeolian sand in a \"sandstone factory\" in the northern Tarim Basin during a greenhouse period. The \"sandstone factory\" provides an opportunity for research on sequence boundary-related aeolian sandstone unrelated to a fluvial incised valley in a continental basin.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"181 ","pages":"Article 107514"},"PeriodicalIF":3.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Provenance, sedimentary paleoenvironment and organic matter accumulation mechanisms in shales from the Lower Cambrian Qiongzhusi Formation, SW Yangtze Block, China","authors":"Hao Xu ,&nbsp;Jie Shen ,&nbsp;Feng Yang ,&nbsp;Qinhong Hu ,&nbsp;Yu Yu ,&nbsp;Liang Xiong ,&nbsp;Tao Zhang ,&nbsp;Hucheng Deng ,&nbsp;Jianhua He","doi":"10.1016/j.marpetgeo.2025.107520","DOIUrl":"10.1016/j.marpetgeo.2025.107520","url":null,"abstract":"<div><div>Sulfur is a critical participant in biogeochemical cycles and in the deposition and preservation of organic carbon, and sulfur compounds and isotope ratios can indicate paleoenvironments. In this study, the major elements, trace and rare earth elements, pyrite morphology, sulfur isotope ratios and detrital zircon U-Pb age dating of shales was performed on shale samples from the Lower Cambrian Qiongzhusi Formation in the Yangtze Block to determine the Early Cambrian marine depositional conditions, the provenance of the shale, and the mechanisms of organic matter (OM) enrichment. The results show that: 1) The source rocks in the sedimentary system were deposited in a continental island arc environment, and originated mainly from the felsic magmatic rocks (such as monzonitic granite) and from tuffaceous rocks in the ancient Kangdian emergent block. 2) Due to the moderate degree of chemical weathering and a generally semi-arid to semi-humid climate, the input of Terrestrial clastics was stable, and the OM dilution effect by Terrestrial clastics was weak; 3) The input of nutrients and the widespread occurrence of hydrothermal activities led to the eutrophication of surface seawater, resulting in high degree of primary productivity; 4) In the restricted sedimentary system, the anoxic-sulfidic bottom water enhanced the enrichment of OM in the Ziyang area, while the bottom water environment was dysoxic with bioturbated sediments and limited preservation of OM in Jingyan area. The lateral heterogeneity of the total organic carbon content in the shale of this formation was greatly affected by changes in OM preservation conditions. These results provide an important basis for a reconstruction of the sedimentary tectonic environment of the Early Cambrian Yangtze Block for a potential shale gas development.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"181 ","pages":"Article 107520"},"PeriodicalIF":3.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of petroleum system elements and processes in the Risha gas field, eastern Jordan: A comprehensive study","authors":"Sherif Farouk ,&nbsp;Mohamed Fagelnour ,&nbsp;Abdelrahman Qteishat ,&nbsp;Fayez Ahmad ,&nbsp;Mohamed Arafat ,&nbsp;Mohammad AlSuwaidi ,&nbsp;Khaled Al-Kahtany ,&nbsp;Thomas Gentzis","doi":"10.1016/j.marpetgeo.2025.107461","DOIUrl":"10.1016/j.marpetgeo.2025.107461","url":null,"abstract":"<div><div>The petroleum system in the Risha gas field, eastern Jordan, is not fully understood. The current study aims to evaluate source rocks, reservoirs, and seals within the basin by integrating 1D basin models and well logs together with geochemical and petrophysical data. Two effective source rocks are identified within the Paleozoic shale intervals, namely the Mudawwara and Dubeidib formations. The Mudawwara and Dubeidib formations with TOC values ranging from 0.51 to 6.75 wt%, which suggests poor to very good potential. The formations contain primarily Type III (gas-prone) and mixed Type II/III (oil/gas-prone) kerogen. The thickness of the Paleozoic sedimentary section increases to the east. In contrast, the thickness of the Mesozoic section increases to the west, and the entrapment area in the middle to the eastern part of the study area is characterized by the accumulation of petroleum in the Ordovician sandstone reservoirs. The Risha sandstone reservoir has an increased net pay thickness in east and southeast directions. The migration of hydrocarbons petroleum in the Risha gas field is strongly suggested as a direct primary migration from the source rock intervals within the Mudawwara and Dubeidib shales to the intercalated sandstone reservoirs of the Risah and Dubeidib formations. In addition, vertical migration along faults and up-dip migration to the middle and eastern parts of the study area are also suggested. The Risha-14 well represents the ideal petroleum system in eastern Jordan, as it encompasses all the key elements of petroleum generation and accumulation. The critical moment for the source rock is estimated to have occurred approximately 250 Ma ago. The effective shale source rocks of the Mudawwara Formation were deposited in the Early Silurian. They entered the main oil window in the Early Devonian (∼410 Ma ago), with significant gas generation occurring in the early Carboniferous (∼330 Ma ago). The Dubeidib Formation sandstone reservoir was deposited during the Ordovician (485-458 Ma ago). Structural traps formed during the Paleozoic (280-250 Ma ago), formed during the Hercynian Orogeny through rifting and compression phases were subsequently charged with petroleum through migration and accumulation.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"181 ","pages":"Article 107461"},"PeriodicalIF":3.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of the Miocene Castellón Sandstones Formation in the Western Mediterranean as a potential geological carbon storage site","authors":"Marc Gil-Ortiz ,&nbsp;Enrique Gomez-Rivas ,&nbsp;Juan Alcalde ,&nbsp;Patricia Cabello ,&nbsp;Luis Miguel Yeste ,&nbsp;Gonzalo Zamora ,&nbsp;Ángel Carrasco ,&nbsp;David García Fernández-Valderrama ,&nbsp;Antonio Martín-Monge ,&nbsp;Marta Mañas ,&nbsp;María Victoria Olgado Azpiazu ,&nbsp;Manuel Ron Martín ,&nbsp;Pujianto Lukito ,&nbsp;Francisco Pángaro","doi":"10.1016/j.marpetgeo.2025.107493","DOIUrl":"10.1016/j.marpetgeo.2025.107493","url":null,"abstract":"<div><div>In response to the growing interest in decarbonizing Europe's industrial hubs, this study examines the potential of the Miocene Castellón Sandstones Formation in the Valencia Trough for geological carbon storage. The proposed storage unit is represented by a siliciclastic succession formed mainly by sandstones and sandy heterolithics, in the Ebro Delta offshore area of the Valencia Trough. The sedimentological characterization of this succession, based on the study of a cored section from Amposta Marino C-2 well, has allowed to identify up to eleven lithofacies, comprising sandstones, heterolithics, calcarenites and carbonate breccias. These lithofacies can be grouped in six facies associations, including: 1) fluvial channel, 2) delta front proximal mouth bar, 3) delta front distal mouth bar, 4) proximal prodelta, 5) distal prodelta and 6) shelfal lag. The seismic stratigraphic analysis carried out throughout the study area points out to the additional presence of delta plain deposits in the northeastern sector of the study area, approximately at 30 km from the present-day Ebro delta shoreline. Based on the interpretation of these facies and seismic facies associations, the proposed depositional model consists of a river dominated, wave-influenced delta for the proto-Ebro deltaic system during the Late Miocene in the Valencia Trough. This study proposes that this sand-prone succession is presented as a good candidate for geological carbon storage in the study area, considering its proximity to the onshore Tarragona's industrial complex and its optimal reservoir characteristics. Additionally, the thick succession of the Ebro Shales also shows great potential as a vertical and lateral seal of the underlying Castellón Sandstones Formation.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"181 ","pages":"Article 107493"},"PeriodicalIF":3.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}