Basin Research最新文献

{"title":"Drainage Pattern Changes in Southeastern Tibet Inferred from Eocene–Modern Sediment Provenance of the Yanyuan Basin","authors":"Xilin Sun,&nbsp;Maria Giuditta Fellin,&nbsp;Sean Douglas Willett,&nbsp;Klaudia F. Kuiper,&nbsp;Yuntao Tian,&nbsp;Zengjie Zhang,&nbsp;Rujun Guo,&nbsp;David Chew,&nbsp;Marcel Guillong,&nbsp;Foteini Drakou,&nbsp;Jan R. Wijbrans","doi":"10.1111/bre.70067","DOIUrl":"https://doi.org/10.1111/bre.70067","url":null,"abstract":"<p>The geometry and evolution of the rivers originating from the Tibetan Plateau have been influenced by topography and climate changes during the India–Asia collision. One notable example is the Jinsha (upper Yangtze) River, which expanded its drainage area at the expense of other rivers through several river captures, the timing of which remains controversial. This study focuses on the Yalong River, a major tributary of the Jinsha River, characterised by deep gorges, sharp elbows, where the river exhibits abrupt changes in channel orientation, and interfluves with high-elevation, low-relief areas that contain riverine sediments. One such area north of the Yalong–Jinsha confluence is the Yanyuan Basin, which is filled with mainly Eocene alluvial fan deposits and Pliocene fluvial conglomerates that preserve part of the detrital history of the Yalong River. We use detrital rutile U–Pb, muscovite ⁴⁰Ar/³⁹Ar, zircon U–Pb, and fission-track double dating to constrain the provenance of the Cenozoic detritus of the Yanyuan Basin. Our combined data suggest that the Eocene clastic infill of the Yanyuan Basin was mainly supplied by the Paleo-Yalong River, which, like the modern Yalong, originated from the Yidun Arc but flowed southward into the Yanyuan Basin, in contrast to the river's current course that flows around the basin and then southward. In the Pliocene, the presence of a small population of young (Cenozoic) zircon grains alongside a dominant population of Neoproterozoic zircons, rutiles, and muscovites shows that the Paleo-Yalong catchment expanded eastward, including a river originating from the Gongga batholith that flowed southwestward into the Yanyuan Basin. The absence of Cenozoic and Late Cretaceous detrital ages in the modern Yalong River, alongside the presence of the Late Cretaceous ages in the modern Jinsha River, indicates that between the Pliocene and the Present, the Yalong basin experienced a reduction in area on both its western and eastern margins. Finally, during this time, drainage reorganisation resulted in the isolation of the Yanyuan Basin from distant sediment sources, as the Yalong entrenched into its modern gorge.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Detrital Zircon Records of Meso-Neoproterozoic Strata in the Yan-Liao Rift Zone, North China Craton, and Their Implications of Tectono-Sedimentary Evolution","authors":"Chenxing Li,&nbsp;Jian Chang,&nbsp;Nansheng Qiu","doi":"10.1111/bre.70068","DOIUrl":"https://doi.org/10.1111/bre.70068","url":null,"abstract":"<div>\u0000 \u0000 <p>The Meso-Neoproterozoic eras witnessed critical transitions in supercontinental cycles that shaped global tectonic regimes and paleogeographic configurations. This study presents LA-ICP-MS zircon U–Pb geochronology analyses of thirteen sandstone samples from the Yan-Liao rift zone along the northern North China Craton (NCC) margin to constrain regional tectonic evolution and basin development. Detrital zircon populations exhibit multiple age clusters, with pre-1800 Ma grains derived from NCC basement terranes and younger populations (&lt; 1.8 Ga) correlating with Mesoproterozoic magmatic events. Systematic younging of Maximum Depositional Age (MDA), determined through robust statistical treatment of the multi-MDA method, reveals spatial–temporal depositional patterns controlled by source-to-sink relationships across the rift system. Provenance analysis demonstrates that evolving rift morphology progressively modified zircon transport mechanisms and age distributions, defining four distinct stages of basin evolution between 1.8 and 0.9 Ga. These evolutionary phases exhibit temporal correlations with global supercontinent cycles—initial rifting phases correspond to Columbia breakup (1.8–1.4 Ga), while later tectonic reorganization aligns with Rodinia assembly (1.4–0.9 Ga). Our integrated approach provides critical constraints on NCC margin evolution during Precambrian supercontinental transitions, offering new insights into cratonic responses to global-scale geodynamic processes.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366940","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":"Overview Over Formation Mechanisms, Structural Domains and Petroleum Systems Implications for Palaeozoic Depocenters of the Norwegian North Sea","authors":"Norman Urrez,&nbsp;Alejandro Escalona,&nbsp;Carita Augustsson","doi":"10.1111/bre.70066","DOIUrl":"https://doi.org/10.1111/bre.70066","url":null,"abstract":"<div>\u0000 \u0000 <p>Upper Palaeozoic basins in the Norwegian North Sea remain among the least understood exploration targets on northwestern Europe's cratonic margins, underscoring the need to refine exploration models. Knowledge of Devonian–Permian stratigraphy and structure in this sector is constrained by sparse well data, poor seismic resolution, deep burial and limited exploration success, despite well-established southern North Sea petroleum systems. This study addresses these gaps by investigating Palaeozoic basin formation mechanisms and their petroleum system implications. By integrating well and seismic data, we have identified four Devonian–Permian tectonosequences and defined three structural domains based on fault architecture. In the Northern Domain, a southwest–northeast-striking Devonian depocenter is interpreted as a pull-apart basin featuring folded Devonian deposits separated by an intra-Devonian unconformity. These characteristics indicate transtensional basin development followed by dextral transpression linked to the Highland Boundary and Southern Uplands faults. The Central and Southern domains formed a Carboniferous backbulge basin north of the Variscan Orogen, where the Mid North Sea–Ringkøbing–Fyn High may have acted as a forebulge. Late Carboniferous–Permian volcanism likely added flexural loading, followed by tectonic quiescence and thermal subsidence recorded in the Rotliegend Group. We infer two distinct petroleum system types: The Northern Domain may host potential Devonian lacustrine source rocks with Devonian–Permian reservoirs, whereas the Central and Southern domains may host Carboniferous coaly source rocks with Carboniferous–Permian reservoirs that resemble Variscan-related systems of the southern North Sea and northwestern Europe. The link of these Palaeozoic domains with orogenic phases and plate-tectonic evolution stresses the need to understand the overall tectonic framework when interpreting basin evolution near ancient plate boundaries. This perspective can help guide exploration efforts where presalt successions remain poorly imaged or largely unexplored.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145341891","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":"3D Structural Modelling and Restoration of a Deformed Alpine Karst Reservoir: Insights into the Groundwater Flows of the Dévoluy Massif (French Alpine Foreland)","authors":"Oriane Parizot,&nbsp;Nicolas Espurt,&nbsp;Benoît Viguier,&nbsp;Guillaume Duclaux,&nbsp;Alexandre Zappelli,&nbsp;Abdeltif Lahfid,&nbsp;Nathan Rispal,&nbsp;Ludovic Mocochain,&nbsp;Pierre Henry,&nbsp;Marianna Jagercikova,&nbsp;Philippe Audra,&nbsp;Bruno Arfib,&nbsp;Laurent Cadilhac","doi":"10.1111/bre.70065","DOIUrl":"10.1111/bre.70065","url":null,"abstract":"<p>In foreland fold-thrust belts, tectonically deformed aquifers remain underexplored, largely due to the complex architecture of their hydrogeological reservoirs. This limited understanding prevents the development of sustainable management policies to face the current decline in groundwater availability. In the southwestern Subalpine Chains, we characterised the structure of the folded Senonian karst aquifer of the Dévoluy Massif, which is transected by the Median Dévoluy Thrust. Using surface structural data, we performed an original 3D structural model of the massif. Quantitative analyses of this model indicate a total Senonian package volume of 114 km³, of which 25 km³ lie below the elevation of Gillardes Spring, the main karst discharge. A structural restoration of the base of the Senonian indicates Alpine shortening of ~4.4 km in the southern part of the massif and ~1.2 km in the northern part. The deformation of the karst reservoir into two N-trending synclines, separated by the Median Dévoluy Thrust, is identified as a key control on the northward groundwater drainage pattern, culminating at Gillardes Spring. This 3D structural modelling approach also allowed for identification of suitable areas for the exploration of new deeper resources. Finally, this study highlights the potential of a hydrostructural approach and 3D structural modelling for assessing the hydrogeology in tectonically deformed karst reservoirs.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70065","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Sand Injection or Deposition: A Perspective From Mineral-Chemical Stratigraphy","authors":"Wiktor Marek Luzinski,&nbsp;Andrew Clifford Morton,&nbsp;Andrew Hurst","doi":"10.1111/bre.70063","DOIUrl":"10.1111/bre.70063","url":null,"abstract":"<p>Mineral-chemical stratigraphy and provenance analysis are applied to aid diagnostics of a sandstone body of uncertain origin in the northern North Sea. The main Gamma discovery sandstone (well 24/9-3), hosted by fine-grained strata in the Balder Formation (early Eocene), has many characteristics of sandstone intrusions, such as discordant upper and lower surfaces and significant jack-up of overlying strata. However, the gross volume and high net-to-gross in boreholes (75% and 85% in 24/9-3 and 24/9-14S, respectively) are unusually high compared with sandstone intrusions known from the subsurface or outcrop examples. To constrain the origin of intra-Balder Fm sandstones in the Gamma area, their heavy mineral assemblages (HMAs) and garnet chemistry are compared with those preserved in depositional Heimdal, Hermod S2, Odin and Frigg Member sandstones found in stratigraphic and geographic proximity. Mineral-chemical characteristics in the Gamma Sandstone are similar to those in depositional sandstone of the Odin Member, a sandstone unit in the Balder Formation. All other depositional sandstone units analysed have dissimilar mineral-chemical features, or other factors preclude them as parent units for the Gamma Sandstone. We conclude that the intra-Balder sandstones in the Gamma discovery occupy their original stratigraphic position and can be assigned to the Odin Member, despite the intense changes to internal and external features caused by in situ remobilisation and sand fluidisation.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Seismic Modelling of Sandstone Intrusions With Unresolvable Geometry","authors":"Daniel Holden,&nbsp;Andrew Hurst,&nbsp;Isabelle Lecomte","doi":"10.1111/bre.70062","DOIUrl":"10.1111/bre.70062","url":null,"abstract":"<p>Seismic modelling of outcrop data from a sand injection complex enables detection of subseismic sandstone intrusions, but the geometry and orientation of individual intrusions remain unresolved. Sand injection complexes are increasingly recognised as a common shallow-crustal process, comprising millimetre- to decametre-scale, close to bedding-concordant sills and strongly bedding-discordant dykes, as well as intrusions with less regular geometry. These features can act as basin-scale fluid migration conduits, hydrocarbon reservoirs and possible sites for CO₂ sequestration. This paper presents 2D point-spread function (PSF) seismic modelling of a digital outcrop model containing a wide range of intrusion geometries, including thin, complex and interconnected features. The results provide insights into the seismic response of subseismic (unresolved) geological features and enable evaluation of the effects of illumination, lateral resolution, dominant frequency and noise on seismic imaging. Multiple densely spaced thin intrusions generate interference as a function of wavelength, producing complex seismic patterns caused by the dense spacing and cross-cutting geometry of intrusions. The seismic patterns show little resemblance to the geometry of the intrusions. Increases in dominant frequency improve the resolution and interpretation of large intrusions from seismic data and preferentially intensify some seismic characteristics, sometimes creating bedding-like, sub-horizontal features that do not exist in the outcrop data. This ambiguity caused by enhancement of sub-horizontal intrusions relative to sub-vertical intrusions can lead to misinterpretation of sandstone presence and distribution. Individual intrusions with a thickness of 1 m may be detected under favourable conditions but are not directly resolvable in seismic data and increased dominant frequency does not necessarily result in improved geological interpretation. High-angle dykes (&gt; 45^o) display linear zones with amplitude dimming, which are attributed to their cross-cutting character, thus facilitating their interpretation. Seismic amplitudes from host strata interact with those of intrusions, diminishing the clarity of the seismic response of intrusions. Limited illumination reduces the accuracy of interpretation. The addition of noise increases the complexity of intrusion-related seismic responses, both enhancing and reducing amplitudes associated with intrusions, specifically in intervals with complex intrusion networks.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145140685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Chronologically Constraining Multiphase Secondary Oil Migration Pathways Using Integrated Geochemistry, Fluid Inclusions and In Situ U–Pb Dating of Calcite: Insights From the Tarim Basin, NW China","authors":"Hao Xu,&nbsp;Zicheng Cao,&nbsp;Xuesong Lu,&nbsp;Zhiliang He,&nbsp;Zhiqi Hu,&nbsp;Xiaowen Guo","doi":"10.1111/bre.70064","DOIUrl":"10.1111/bre.70064","url":null,"abstract":"<div>\u0000 \u0000 <p>Understanding the pathways and timing of multiphase oil migration is critical for accurate hydrocarbon exploration, particularly in tectonically complex and deeply buried sedimentary basins. In superimposed basins, traditional molecular geochemical indicators often struggle to resolve multiphase hydrocarbon charge histories due to the oil mixing, limiting their effectiveness. This study integrates carbazole-based geochemical indicators and thermal maturity modelling of source rocks with in situ U–Pb dating of calcite cements that contain primary oil inclusions, to reconstruct the secondary migration history of crude oil in the Ordovician carbonate reservoirs of the Akeyasu area, Tarim Basin, NW China. This integrated approach constrains the timing, direction, and mechanism of oil migration within a chronological framework. Three distinct oil charge episodes include Middle Caledonian (~458–448 Ma), Hercynian (332–252 Ma), and Himalayan (&lt; 20 Ma) are identified, all originating from the same source rocks. The first episode involved long-distance lateral migration along an unconformity surface, whereas the subsequent two were dominated by vertical migration along reactivated fault systems. This work resolves long-standing uncertainties regarding multiphase oil mixing and migration in superimposed basins and establishes a transferable workflow for dating and decoding complex petroleum system evolutions globally. The findings not only clarify the spatial and temporal evolution of petroleum accumulation in the Tarim Basin but also offer a methodological blueprint for unravelling complex migration histories in other ancient and structurally complex sedimentary basins worldwide.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089941","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":"From Hydrocarbon to CO2 Storage: Unveiling the Potential of the Miocene Lille John Member in the Danish North Sea","authors":"Zeenat Maniar,&nbsp;Florian Smit,&nbsp;Erik Skovbjerg Rasmussen,&nbsp;Kresten Anderskouv,&nbsp;Kenneth Bredesen,&nbsp;Lars Nielsen","doi":"10.1111/bre.70061","DOIUrl":"10.1111/bre.70061","url":null,"abstract":"<p>To achieve net-zero carbon emissions by 2050, gigatonnes of CO₂ must be captured and stored in the subsurface. Screening and exploration of prospective storage sites have thus gained momentum in recent years. The Miocene-age Lille John Member in the Danish Central Graben represents a promising, yet underexplored, CO₂ storage candidate due to its lack of commercial hydrocarbon potential. This study integrates high-resolution 3D seismic data, core analyses, and wireline logs within a sequence stratigraphic framework to characterise the depositional environment within the targeted Miocene interval. Seismic attributes such as RMS amplitude and spectral decomposition are used to define the three-dimensional architecture of the geobodies and evaluate their potential for CO₂ storage by comprehending reservoir distribution, heterogeneity, and connectivity. The reservoir consists of two unconsolidated sand units, informally termed the lower and upper sand units, separated by a mudstone interval. The lower sand unit represents a basin floor fan emplaced by gravity flows during the falling stage systems tract, while the upper unit comprises unconfined gravity flow deposits associated with the lowstand systems tract. The reservoir sands of the Lille John Member are predominantly localised in the southeastern portion of the Central Graben at depths suitable for storing supercritical CO₂. Theoretical P50 storage capacity is estimated at approximately 1108 million tonnes for the lower sand unit and 51 million tonnes for the upper unit. Heterogeneities such as silt beds, mudstones, and carbonate concretions may act as flow baffles, enhancing storage efficiency through plume dispersion, residual trapping, CO₂ dissolution, and geochemical interactions. This study situates the Lille John Member within a broader regional framework by integrating a larger 3D seismic dataset with advanced seismic interpretation workflows, extending beyond the scope of previous investigations. The results provide new insights with implications for unlocking CO₂ storage potential in analogous depositional settings.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70061","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Multiphase Fracturing, Fluid Evolution, and Geothermal Sustainability in Mesoproterozoic Carbonates of the North China Craton","authors":"Lei Jiang,&nbsp;Zichen Wang,&nbsp;Yongliang Ou,&nbsp;Feng Ma,&nbsp;Yibo Wang","doi":"10.1111/bre.70057","DOIUrl":"https://doi.org/10.1111/bre.70057","url":null,"abstract":"<div>\u0000 \u0000 <p>Understanding the origin and evolution of fractures is critical for evaluating the long-term sustainability of geothermal water production from carbonate reservoirs, an emerging low-carbon energy source aligned with global carbon-neutrality goals. In this study, we develop a fracture-fluid evolution model for Mesoproterozoic carbonates of the North China Craton (NCC) by integrating U–Pb dating of fracture-filling dolomites with petrological, micro-CT, and multi-isotopic (C, O, clumped and ⁸⁷Sr/⁸⁶Sr) analyses. Three principal phases were identified at ~1550 to 973 Ma, 669 to 597 Ma, and 106 to 58 Ma. Clumped isotope-derived temperatures (57.1°C–93.6°C) and calculated burial depths (mostly &lt; 2 km, with few reaching ~2.5 km) indicate predominantly shallow diagenetic conditions. Fluids responsible for Phases I–II fracturing were primarily seawater-derived, whereas meteoric water dominated Phase III fracturing beginning in the late Mesozoic. Our results demonstrate that high reservoir connectivity—primarily driven by multiphase fracturing—exerts a first-order control on reservoir quality, while porosity and pore-throat dimensions play a secondary role. This connectivity, coupled with the absence of large karstic cavities, sustains high hydrostatic pressures and sustained geothermal yields. An estimated ~1.1 × 10²² J of geothermal energy—derived from meteoric recharge over recent geologic time—underscores the carbon-neutral potential of these fractured carbonates. The integrated methodology presented here offers a transferable framework for evaluating fractured geothermal systems worldwide.</p>\u0000 </div>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057737","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":"High Impedance Mudstone Associated With Sand Injection Complexes: Significance for Basin-Scale Fluid Retention and Escape","authors":"Rene Jonk,&nbsp;Marnix Vermaas,&nbsp;Bader Al-Aamri,&nbsp;Tara L. Stephens","doi":"10.1111/bre.70058","DOIUrl":"https://doi.org/10.1111/bre.70058","url":null,"abstract":"<p>High impedance (hard) mudstones are sometimes observed in association with sand injection complexes in the Paleogene petroleum province of the northern North Sea. A hard mudstone surrounding a water-bearing sandstone can give a similar acoustic response to an oil-bearing sandstone surrounded by low impedance (soft) mudstone. The presence of hard mudstone thus impacts the ability to predict hydrocarbon presence directly from seismic data during exploration. To establish the mechanism of ‘hardening’ to better predict the presence of variable mudstone characteristics, we examine three cored wells from the Beryl Embayment. Well logs and core were examined to characterise the structure, petrology, petrophysical properties and spatial distribution of both hard and soft mudstones. The results indicate that mudstone hardening is most likely associated with mechanical compaction and efficient dewatering of mudstones into the sand injection complex. This process is enhanced where sand injection complexes transect primary overpressure zones, that promote dewatering from basal overpressured mudstone into the injection network. This study highlights that seismic response needs careful investigation in the context of the complexity of the injectite complex along with variable mudstone attributes. Additionally, this process highlights the role sand injection complexes play in efficient dewatering through lateral transfer in overpressured basins.</p>","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":"37 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/bre.70058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}