Marine and Petroleum Geology最新文献

{"title":"Deoxygenation preceding the Carnian Pluvial Episode (Late Triassic) in the Qiangtang Basin (Tibetan Plateau): Implications for organic and inorganic geochemistry and petrography","authors":"Fei Lin ,&nbsp;Jian Wang ,&nbsp;Ahmed Mansour ,&nbsp;Xiugen Fu ,&nbsp;Shaohua Su ,&nbsp;Ying Nie ,&nbsp;Mohamed S. Ahmed ,&nbsp;Shengqiang Zeng ,&nbsp;Xueren Li","doi":"10.1016/j.marpetgeo.2025.107289","DOIUrl":"10.1016/j.marpetgeo.2025.107289","url":null,"abstract":"<div><div>The Carnian Pluvial Episode (CPE; ∼233 Ma) is marked by global warming associated with an intensified hydrological cycle and increased siliciclastic input, coinciding with a widespread crisis in carbonate production. It was further linked to the eruption of the Wrangellia Large Igneous Province (W-LIP), seawater hypoxia, and significant biotic turnover. While some studies have investigated the CPE in Tibet, the environmental and oceanographic processes leading up to this event have received limited attention. In this study, total organic carbon (TOC), biomarker, inorganic geochemistry, and pyrite framboid petrography of samples collected from the Upper Triassic (Carnian) Bagong Formation in the QZ8 well of the Qiangtang Basin (Tibet) were performed to explore the environmental, paleoceanographic, and organic matter controlling processes preceding the CPE. Results exhibit moderate to high enrichments of trace element redox proxies, such as U, Mo, and V, suggesting that the Bagong Formation was deposited under deoxygenation conditions, from severe anoxia to intermittent euxinia prior to the CPE. The presence of pyrite framboids with small mean diameters and narrow distribution ranges further support this interpretation of deficient redox conditions in bottom and pore waters. Additionally, the moderate to strong positive correlations between enrichment factor values of Mo and V and TOC content indicate that the available organic matter was controlled by oxygen-depleted conditions. Enrichment of Cu, Cd, and Zn, along with their Al-normalized ratios that show strong positive correlations with TOC content, reveal high marine primary productivity before the CPE. Meanwhile, the Si/Al, Ti/Al, and Zr/Al ratios showed cyclic patterns around moderate values, suggesting a modest terrigenous sediment supply, consistent with high Sr/Ba and Sr/Al ratios indicating a predominantly saline environment interspersed with enhanced terrestrial/riverine runoff during deposition. Biomarker analysis reveals a substantial contribution of tricyclic and tetracyclic terpanes, with the C₁₉/C₂₃ TT and C₂₀/C₂₃ TT ratios indicating increased terrestrial organic matter input, supported by the presence of Type III kerogen in the Bagong Formation. Prior to the CPE, the climate was warm and humid, leading to accelerated hydrological cycling and freshwater influx of terrestrial organic matter into the Qiangtang Basin. This likely triggered an increase in nutrient supply under severe deoxygenation conditions and a high sedimentation rate, resulting in enhanced organic matter production and preservation regimes while minimizing the carbonate dilution effect.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"173 ","pages":"Article 107289"},"PeriodicalIF":3.7,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148746","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":"Recognition and impact on reservoir quality of fractures in fine-grained sedimentary rocks using image and array acoustic logs","authors":"Yuyue Huang ,&nbsp;Guiwen Wang ,&nbsp;Lichun Kuang ,&nbsp;Chaoliu Li ,&nbsp;Ming Wang ,&nbsp;Song Wang ,&nbsp;Hongbin Li ,&nbsp;Fei Zhao ,&nbsp;Jin Lai","doi":"10.1016/j.marpetgeo.2025.107284","DOIUrl":"10.1016/j.marpetgeo.2025.107284","url":null,"abstract":"<div><div>Fine-grained sedimentary rocks have been widely regarded as effective reservoirs and source rocks of tight oil and shale oil. Natural fractures play a critical role in promoting oil enrichment and enhancing production. Clarifying the contribution of fractures to reservoir quality is important but lacks systematic research. Limitations exist in both core outcrop descriptions and seismic predictions of fractures. New technological advancements in well logs offer new avenues for multi-scale fracture characterization. Image logs and array acoustic logs are used to systematically investigate natural fractures in the Member 7 of Upper Triassic Yanchang Formation (Chang 7) shale oil reservoirs in the Ordos Basin. Natural fractures include tectonic fractures and bedding-parallel fractures. An absolute match between core data and image log data is achieved through the precise core homing. The reliability of image logs is enhanced by establishing the fracture identification templates under the core scale. The Vp/Vs ratio, energy attenuation, waveform distortion, and S-wave slowness anisotropy of array acoustic logs are effective for detecting and predicting natural fractures around the borehole. The impact of natural fractures on reservoir quality is evaluated by considering fracture parameters, radial extension and their relationship with in-situ stress. The results show that combining the occurrence and type of fractures detected by image logs and the fracture extension state indicated by fast and slow S-wave radial variations, the effectiveness of fractures around the wellbore can be accurately evaluated. T₁-T₂ maps from 2D NMR logs also offer insights into the relationship between fractures and reservoir quality. Natural fractures that are nearly parallel to the direction of the in-situ SH_max have proven to be effective and significantly enhance hydrocarbon productivity. The research above may aid in optimizing sweet spot evaluation and stimulating shale oil production.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"173 ","pages":"Article 107284"},"PeriodicalIF":3.7,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147829","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":"Reservoir quality drivers in the Oligo-Miocene Asmari Formation, Dezful Embayment, Iran: Facies, diagenesis, and tectonic controls","authors":"Roghayeh Fallah-Bagtash ,&nbsp;Aram Bayet-Goll ,&nbsp;Armin Omidpour ,&nbsp;Umid Kakemem","doi":"10.1016/j.marpetgeo.2024.107279","DOIUrl":"10.1016/j.marpetgeo.2024.107279","url":null,"abstract":"<div><div>The Oligo-Miocene Asmari Formation in the Shadegan Oil Field, located in the Dezful Embayment in southwestern Iran, is renowned for its complex geological characteristics in the Middle East. This study systematically investigates the drivers of reservoir quality, emphasizing the interplay between geological settings, depositional environments and facies, diagenetic processes, and tectonic activities that shape porosity and permeability. Based on the sedimentary architecture and analysis of the facies associations this formation contains a diverse assemblage of carbonate and siliciclastic lithofacies (twenty-six carbonate microfacies and six siliciclastic facies association), revealing a mixed depositional system influenced by siliciclastic influx, climatic and sea-level fluctuations, and tectonic movements. Extensive core and petrophysical data analysis were utilized to identify hydraulic flow units (HFUs) and optimize reservoir zonation using advanced analytical techniques, including machine learning algorithms. Four hydraulic flow units (HFUs) were determined and evaluated against lithology and petrophysical values: baffle unit (HFU1), normal unit (HFU2), permeable unit (HFU3), and high permeable unit (HFU4).</div><div>Key findings underscore the critical role of fractures in enhancing reservoir productivity, significantly impacting hydrocarbon recovery rates. Additionally, the analysis of diagenetic processes such as dolomitization, cementation, and dissolution reveals their dual impact—either enhancing or degrading reservoir quality. The study concludes that effective reservoir characterization depends on integrated methodologies, which combine traditional geological assessments with modern data processing techniques. This approach enhances exploration and production strategies in complex carbonate reservoirs. Ultimately, this research offers new insights into a comprehensive framework for understanding the drivers of reservoir quality in the Asmari Formation and their implications for hydrocarbon development.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"173 ","pages":"Article 107279"},"PeriodicalIF":3.7,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148744","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":"Milankovitch-driven terrigenous deposit influx in Middle Ordovician marine successions of Western Australia: Insights for paleoclimate and geochronology","authors":"Omid Falahatkhah ,&nbsp;Abbas Ghaderi ,&nbsp;Ali Kadkhodaie ,&nbsp;Reza Rezaee","doi":"10.1016/j.marpetgeo.2024.107282","DOIUrl":"10.1016/j.marpetgeo.2024.107282","url":null,"abstract":"<div><div>This study investigates the terrigenous sediment influx in the Canning Basin, Western Australia, during the Darriwilian Stage of the Middle Ordovician, specifically correlating it with Milankovitch obliquity cycles. The basic stratigraphic data came from the Goldwyer Formation within Theia 1 well which was dated using the U-Pb zircon geochronology. Four ash beds, located in the lower part of the formation, yielded distinct radiometric ages at depths of 1550.81 m (466.07 ± 0.12 Ma), 1559.81 m (466.31 ± 0.11 Ma), 1572.55 m (466.84 ± 0.11 Ma), and 1587.10 m (467.12 ± 0.14 Ma) which following the age of conodont biostratigraphy. Based on the astrochronological analysis, duration of the Darriwilian in the Canning Basin is estimated at 9.03 ± 0.3 Myr, providing a precise chronological framework for the studied sedimentary successions. Core sample examinations indicated notable lithological discrepancies with a pronounced increase in terrigenous sedimentation recorded during intervals of elevated obliquity. Quantitative analysis revealed that sedimentation rates reached their zenith in correlation with ∼1.2 Myr obliquity cycles, resulting in substantial accumulations of fine-grained sediments, notably shale and mudstone. Petrographic examination identified a predominance of silt and clay-sized particles during these high influx periods, confirming a direct relationship between obliquity and sediment composition and led to enhanced fossil preservation. ICP-MS analysis of 39 samples indicated variations in elemental abundance that corresponded with the identified obliquity cycles, further supporting the correlation between climate changes and sediment influx. Scatter diagrams illustrated the relationships between various geochemical proxies, revealing trends that align with the sedimentary data. The findings confirm that the Canning Basin experienced significant shifts in sedimentation patterns driven by obliquity-induced climate changes during the Middle Ordovician. This research demonstrates how obliquity affects sedimentation rates and fossil preservation in the Canning Basin, enhancing our understanding of its geological history.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"173 ","pages":"Article 107282"},"PeriodicalIF":3.7,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147884","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":"Multi-component model simulation of the formation mechanism of a retrograde lowstand wedge during slow sea-level fall","authors":"Haoyuan Lv ,&nbsp;Guoqiang Xu","doi":"10.1016/j.marpetgeo.2024.107281","DOIUrl":"10.1016/j.marpetgeo.2024.107281","url":null,"abstract":"<div><div>In many sequence-stratigraphic models, the slow sea-level fall stage corresponds to the development of retrograde lowstand slope fans. However, a unified and clear explanation for whether sediment existed at the shelf edge and the resulting sediment stacking pattern during this stage is lacking. Based on observational data and a pre-existing prototype sequence model established according to the data, we found that during the slow sea-level fall stage, a retrograde lowstand wedge can develop at the shelf edge. To explain this retrograde lowstand wedge and clarify its formation mechanism during slow sea-level fall, this study simulated the stratigraphic stacking pattern of a prototype sequence in a passive continental margin basin in the north of the South China Sea using a two-dimensional multi-component model. We then simulated the distribution of accommodation during six stages in a 3rd-order cycle and described the structural changes in the stratigraphic units over 100,000 years. The simulation results indicated that based on the average thermal subsidence of the shelf, differential thermal subsidence and compaction subsidence of sediment lead to the generation of more accommodation at the shelf edge during the slow sea-level fall stage. Moreover, this leads to the retention of more accommodation at the top of the forced regressive wedge before the development of the retrograde wedge (in which compaction plays an important role). Influenced by this, the distribution of accommodation and sediment migrates landward, leading to the development of the retrograde lowstand wedge. The results of this study elucidate the formation mechanism of retrograde lowstand wedges and improve the theory of sequence stratigraphy.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"173 ","pages":"Article 107281"},"PeriodicalIF":3.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147883","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":"First application of high-resolution X-ray computed tomography to quantify the fossil record of foraminifera: The Nicola bed, Monte San Nicola, Sicily; type area for the Quaternary System","authors":"Wiesława Radmacher ,&nbsp;Martin J. Head ,&nbsp;Grzegorz P. Kaczmarczyk ,&nbsp;Mateusz Mikołajczak ,&nbsp;Adam Włodek ,&nbsp;Anna Spadło ,&nbsp;Daniel Wałach ,&nbsp;Alfred Uchman ,&nbsp;Antonio Caruso","doi":"10.1016/j.marpetgeo.2024.107283","DOIUrl":"10.1016/j.marpetgeo.2024.107283","url":null,"abstract":"<div><div>The distinctive microlaminated Nicola bed marks the base of the Quaternary System at the type locality of Monte San Nicola in southern Sicily. We have analysed a sediment block that traverses the Nicola bed at the Mandorlo section located ∼400 m WNW of the GSSP. Primary sedimentological and ichnofabric analysis of the polished surface combined with X-ray computed tomography (CT) reveals changes in dissolved bottom water oxygen levels before, during and after deposition of the Nicola bed, beginning with a progressive but rapid transition to anoxia at its onset. A more gradual recovery to oxygenated conditions followed Nicola bed deposition. Planktonic foraminifera are recognised by X-ray CT as either empty or infilled near-spherical voids, and the individual volume (≈size) is estimated for each test in addition to its position in the sediment block. Pronounced foraminiferal abundance peaks through the Nicola bed, with a frequency of hundreds of years, suggest (quasi-)cyclical changes in the mixed layer of the water column, thereby implicating either high-frequency oscillations within the climate system or the long-term modulation of solar cycles. This is the first study to explore the distribution of foraminiferal tests through a sediment block using X-ray CT, revealing its potential as an inexpensive non-destructive method for the quantitative study of microfossils at extremely high stratigraphic resolution.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"174 ","pages":"Article 107283"},"PeriodicalIF":3.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178262","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":"Corrigendum to “The latest activity of the slope fault zone (Pearl River Mouth) in northern South China Sea and implications for earthquake hazard assessments” [166 (2024) 106937]","authors":"Liangwei Lv ,&nbsp;Zhigang Li ,&nbsp;Dawei Wang ,&nbsp;Weitao Wang ,&nbsp;Xiangming Dai ,&nbsp;Fanchang Zeng ,&nbsp;Linlin Li ,&nbsp;Hao Liang ,&nbsp;Gege Hui ,&nbsp;Weiwang Long ,&nbsp;Peizhen Zhang","doi":"10.1016/j.marpetgeo.2024.107209","DOIUrl":"10.1016/j.marpetgeo.2024.107209","url":null,"abstract":"","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"171 ","pages":"Article 107209"},"PeriodicalIF":3.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177170","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":"Oil–reservoir correlation: Unravelling the producing reservoir for the sulfur-rich Qianjiang shale oil play","authors":"Yuanjia Han ,&nbsp;Dongqi An ,&nbsp;Shiqiang Wu ,&nbsp;Furong Wang ,&nbsp;Xiaowen Guo ,&nbsp;Zhiliang He","doi":"10.1016/j.marpetgeo.2024.107176","DOIUrl":"10.1016/j.marpetgeo.2024.107176","url":null,"abstract":"<div><div>The hypersaline Qianjiang shale oil play represents a promising yet challenging target for exploration due to its multiple stacked shale-carbonate layers, which complicate the identification of the most viable extraction sites. Additionally, the oil accumulated in these layers is immature to low-mature and considerably high in sulphur content. To trace the shale zones after fracturing, a newly developed oil-reservoir correlation method employing Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) was utilised. This method proved effective in distinguishing between the acidic nitrogen-, sulphur-, and oxygen-containing (NSO) compounds identified by the negative mode of electrospray ionisation FT-ICR MS and the less polar NSO compounds and aromatic hydrocarbons detected by positive ion atmospheric pressure photoionisation FT-ICR MS. These compounds facilitated the deconvolution of oils produced from mixed layers in the hypersaline Qianjiang shale play. The zones of oil production identified through this method corresponded well with shale reservoirs previously characterised by anomalously high oil saturation index values (OSI &gt;400 mg/g TOC) and a preferential enrichment of saturated hydrocarbons. A detailed analysis of C_31-35 homohopane distributions in shale extracts and crude oil corroborated these findings. The variability in the producibility of NSO compounds and aromatic hydrocarbons was examined based on functional group, degree of aromatisation, and molecular weight. During production, sulphur- and nitrogen-containing compounds predominantly migrated into the produced oil, whereas oxygen-containing compounds were less affected. Nonetheless, determining the production partitioning of aromatic hydrocarbons remains challenging; if present, it may be obscured by the commingled production effects from multiple layers.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"171 ","pages":"Article 107176"},"PeriodicalIF":3.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177168","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":"Corrigendum to “Mapping the resistivity structure of Walker Ridge 313 in the Gulf of Mexico using the marine CSEM method” [Mar. Petrol. Geol. 88 (2017), 1013–1031]","authors":"Karen Weitemeyer ,&nbsp;Steven Constable ,&nbsp;Dianna Shelander ,&nbsp;Seth Haines","doi":"10.1016/j.marpetgeo.2024.107200","DOIUrl":"10.1016/j.marpetgeo.2024.107200","url":null,"abstract":"","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"171 ","pages":"Article 107200"},"PeriodicalIF":3.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177169","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 novel method for automatic quantification of different pore types in shale based on SEM-EDS calibration","authors":"Zhentao Dong ,&nbsp;Shansi Tian ,&nbsp;Haitao Xue ,&nbsp;Shuangfang Lu ,&nbsp;Bo Liu ,&nbsp;Valentina Erastova ,&nbsp;Guohui Chen ,&nbsp;Yuying Zhang","doi":"10.1016/j.marpetgeo.2024.107278","DOIUrl":"10.1016/j.marpetgeo.2024.107278","url":null,"abstract":"<div><div>Pore type is a crucial consideration in the quantification of shale pores. Convolutional Neural Networks (CNNs) are widely used for identifying pore types in shale, but it is hampered by feature extraction bias, difficult data labeling, and poor generalization ability. Compared to secondary electron (SE) images, mineral distribution maps have low resolutions that pose a significant obstacle to pore type identification. This paper presents a method for identifying and quantifying pore types based on pore-matrix contact relationships. Organic matter, organic pores, and inorganic pores are extracted from SE images using the edge-threshold automatic processing (ETAP) method. Next, the labeled watershed algorithm is used to improve the low-resolution mineral distribution map to the SE image level. The high-resolution mineral distribution map is then combined with pore extraction images, permitting the identification of pore types. Finally, pore size, surface porosity, generalized fractal dimension, and contact angle are calculated for each pore type. We used this new method to identify pores in images of the Longmaxi, Qiongzhusi, and Qingshankou shale. We found that high-resolution mineral distribution maps significantly enhance pore identification accuracy. The Longmaxi Formation clay-rich shale is dominated by organic pores (over 60%), while the Qiongzhusi Formation siliceous shale is characterized by intergranular pores and fractures (fractures contributing 30%). In the Qingshankou Formation clay-rich shale, clay pores (35%) and cracks dominate, whereas the Qingshankou Formation siliceous shale is primarily composed of intergranular pores (17%) and cracks (30%), with distinct pore size distributions across these lithofacies. There is a significant difference in the wettability of the matrix and pores of the Longmaxi shale, primarily due to the dominant influence of organic matter on the pore surfaces.</div></div>","PeriodicalId":18189,"journal":{"name":"Marine and Petroleum Geology","volume":"173 ","pages":"Article 107278"},"PeriodicalIF":3.7,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147827","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}