Petroleum Science最新文献

{"title":"Effects of gas components on acid-rock reaction during CO2-contained industrial waste gas (CO2-contained IWG) injection into deep shale reservoir on geologic time scale","authors":"Yi-Fan Wang ,&nbsp;Jing Wang ,&nbsp;Hui-Qing Liu ,&nbsp;Xiao-Cong Lv ,&nbsp;Ze-Min Ji","doi":"10.1016/j.petsci.2025.02.023","DOIUrl":"10.1016/j.petsci.2025.02.023","url":null,"abstract":"<div><div>The shortage of CO₂ source and the challenges associated with the separation of pure CO₂ have led to a growing interest in the potential utilization of CO₂-contained IWG. Therefore, this study has established an acid-rock interaction kinetic model to characterize the long-term interactions between CO₂-contained IWG and shale. The findings delineate the reaction process into three phases: during the initial 10 years, solubility trapping predominates, with minimal mineral dissolution. This increases shale porosity, promoting the diffusion and storage range of CO₂-contained IWG. Between 10 and 300 years, mineral dissolution/precipitation assumes primacy, with mineral trapping gradually supplanting dissolution. Notably, shale porosity diminishes by a minimum of approximately 40%, effectively inhibiting gas leakage. After 300 years, equilibrium is reached, with rock porosity consistently lower than the initial porosity. Throughout the entire reaction process, as the initial CO₂ concentration decreases, the initial pH drops from 4.42 to 3.61, resulting in a roughly 20% increase in porosity. Additionally, it is necessary to regulate its concentration to avoid H₂S leakage during CO₂-contained IWG geological sequestration. And particular attention should be directed towards the risk of gas leakage when the IWG exhibit high levels of SO₂ or NO₂.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2604-2618"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TOC","authors":"","doi":"10.1016/S1995-8226(25)00205-5","DOIUrl":"10.1016/S1995-8226(25)00205-5","url":null,"abstract":"","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages i-ii"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porosity prediction based on improved structural modeling deep learning method guided by petrophysical information","authors":"Bo-Cheng Tao ,&nbsp;Huai-Lai Zhou ,&nbsp;Wen-Yue Wu ,&nbsp;Gan Zhang ,&nbsp;Bing Liu ,&nbsp;Xing-Ye Liu","doi":"10.1016/j.petsci.2025.03.035","DOIUrl":"10.1016/j.petsci.2025.03.035","url":null,"abstract":"<div><div>Porosity is an important attribute for evaluating the petrophysical properties of reservoirs, and has guiding significance for the exploration and development of oil and gas. The seismic inversion is a key method for comprehensively obtaining the porosity. Deep learning methods provide an intelligent approach to suppress the ambiguity of the conventional inversion method. However, under the trace-by-trace inversion strategy, there is a lack of constraints from geological structural information, resulting in poor lateral continuity of prediction results. In addition, the heterogeneity and the sedimentary variability of subsurface media also lead to uncertainty in intelligent prediction. To achieve fine prediction of porosity, we consider the lateral continuity and variability and propose an improved structural modeling deep learning porosity prediction method. First, we combine well data, waveform attributes, and structural information as constraints to model geophysical parameters, constructing a high-quality training dataset with sedimentary facies-controlled significance. Subsequently, we introduce a gated axial attention mechanism to enhance the features of dataset and design a bidirectional closed-loop network system constrained by inversion and forward processes. The constraint coefficient is adaptively adjusted by the petrophysical information contained between the porosity and impedance in the study area. We demonstrate the effectiveness of the adaptive coefficient through numerical experiments. Finally, we compare the performance differences between the proposed method and conventional deep learning methods using data from two study areas. The proposed method achieves better consistency with the logging porosity, demonstrating the superiority of the proposed method.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2325-2338"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extracting useful information from sparsely logged wellbores for improved rock typing of heterogeneous reservoir characterization using well-log attributes, feature influence and optimization","authors":"David A. Wood","doi":"10.1016/j.petsci.2025.03.023","DOIUrl":"10.1016/j.petsci.2025.03.023","url":null,"abstract":"<div><div>The information from sparsely logged wellbores is currently under-utilized in reservoir simulation models and their proxies using deep and machine learning (DL/ML). This is particularly problematic for large heterogeneous gas/oil reservoirs being considered for repurposing as gas storage reservoirs for CH₄, CO₂ or H₂ and/or enhanced oil recovery technologies. Lack of well-log data leads to inadequate spatial definition of complex models due to the large uncertainties associated with the extrapolation of petrophysical rock types (PRT) calibrated with limited core data across heterogeneous and/or anisotropic reservoirs. Extracting well-log attributes from the few well logs available in many wells and tying PRT predictions based on them to seismic data has the potential to substantially improve the confidence in PRT 3D-mapping across such reservoirs. That process becomes more efficient when coupled with DL/ML models incorporating feature importance and optimized, dual-objective feature selection techniques.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2307-2311"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The flow field characteristics and rock breaking ability of cone-straight abrasive jet, rotary abrasive jet, and straight-rotating mixed abrasive jet","authors":"Jing-Bin Li ,&nbsp;Ergun Kuru ,&nbsp;Wen-Bin Li ,&nbsp;Chen-Rui Guo ,&nbsp;Gen-Sheng Li ,&nbsp;Zhong-Wei Huang","doi":"10.1016/j.petsci.2025.04.010","DOIUrl":"10.1016/j.petsci.2025.04.010","url":null,"abstract":"<div><div>Radial jet drilling (RJD) technology is expected to be a technology for the efficient exploitation of geothermal resources. However, the low rock-breaking efficiency is the major obstacle hindering the development of RJD technology. The flow field characteristics and rock breaking ability of cone-straight abrasive jet, rotary abrasive jet, and straight-rotating mixed abrasive jet are analyzed by numerical simulations and experiments. Results show that the axial velocity of the cone-straight abrasive jet is high, the tangential velocity is basically zero, the radial velocity is also small, and the jet impact area is concentrated in the center. A deep hole with a diameter of only 25 mm is formed when the cone-straight abrasive jet breaks the granite. Due to the presence of the guiding impeller, the rotary abrasive jet basically has no axial velocity and has the highest tangential and radial velocity, so it can break the granite to form a hole with a diameter of about 55 mm and a central bulge. The straight-rotating mixed abrasive jet has a large axial/tangential/radial velocity at the same time, so it can break the granite to form a hole with a diameter of about 52 mm with a low bulge. The results show that the straight-rotating mixed abrasive jet combines the advantages of the cone-straight jet and the rotary jet, and is more suitable for the RJD technology. The research results can provide reference for the development of efficient rock-breaking and hole-forming technology, and promote the development of RJD technology in the field of geothermal development.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2457-2464"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differential adsorption characteristics in the composite model of deep marine shale: Implication from molecular dynamics simulations","authors":"Yu-Ying Wang ,&nbsp;Jun-Qing Chen ,&nbsp;Fu-Jie Jiang ,&nbsp;Xiao-Bin Yang ,&nbsp;Xiao Zhang ,&nbsp;Hong Pang ,&nbsp;Dong-Xia Chen ,&nbsp;Bing-Yao Li ,&nbsp;Xin-Yi Niu ,&nbsp;Gui-Li Ma ,&nbsp;Kan-Yuan Shi","doi":"10.1016/j.petsci.2025.03.017","DOIUrl":"10.1016/j.petsci.2025.03.017","url":null,"abstract":"<div><div>Shale gas serves as a significant strategic successor resource for future oil and gas reserves and production in China. Thus, a profound understanding of the adsorption mechanism of shale gas in shale reservoirs is crucial to accurately predict and evaluate shale gas reserves. In this study, we utilized two simulation methods, molecular dynamics simulation and Giant Canonical Monte Carlo simulation to examine the adsorption characteristics of kerogen under varying temperature and pressure conditions. We compared the results under identical temperature and pressure conditions for different mineral–kerogen composite models. Moreover, we examined the effects of temperature, pressure, and mineral species on the kerogen adsorption mechanism. The results indicate that shale formations with high organic matter content and a substantial proportion of non-clay inorganic minerals, as well as those subjected to higher temperature and pressure conditions than the shallow layer, possess a greater capacity to accommodate shale gas. This study examined the adsorption mechanism of methane in shale gas using different mineral–kerogen composite models. The findings of this study provide more accurate guidance and support for efficient development of shale gas.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2247-2261"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The fractal characteristics of the pore throat structure of tight sandstone and its influence on oil content: A case study of the Chang 7 Member of the Ordos Basin, China","authors":"Peng Li ,&nbsp;Bao-Jian Shen ,&nbsp;Ya-Li Liu ,&nbsp;He Bi ,&nbsp;Zhong-Bao Liu ,&nbsp;Rui-Kang Bian ,&nbsp;Peng-Wei Wang ,&nbsp;Pei Li","doi":"10.1016/j.petsci.2025.03.016","DOIUrl":"10.1016/j.petsci.2025.03.016","url":null,"abstract":"<div><div>Tight oil is the most viable target for unconventional oil and gas exploration, but the complexity of micro-/nanopore throat systems significantly affects the oil content of reservoirs. To investigate the causes of heterogeneity in oil-bearing reservoirs, a high-pressure mercury injection experiment combined with fractal theory was conducted to analyze the micro pore throat structure characteristics of the tight sandstone of Chang 7 Member reservoirs in the Ordos Basin. The factors controlling the variations in oil content among tight sandstone samples were identified based on mineral composition characteristics. The results indicate that the pore throat radius distribution is mainly unimodal an bimodal. In oil-bearing samples, the pore throat distributions align well with the corresponding permeability contribution curves, while in oil-free samples, there is a clear deviation from these curves. Mesopore throats exert the greatest influence on seepage capacity. Differences in fractal characteristics are primarily reflected in D1 values, with oil-free samples exhibiting D1 values close to 3, indicating an extremely nonuniform pore throat structure at this scale. The content of quartz, plagioclase, and chlorite is significantly higher in oil-bearing samples than in oil-free samples, whereas calcite content is lower in oil-bearing samples. There is a positive correlation between the contents of quartz, plagioclase, and chlorite with D1; their increased presence contributes to a more favorable pore throat structure. Conversely, the calcite contents show an inverse relationship with D1. Cementation increases the complexity of pore throat structures, while multiple diagenetic processes simultaneously control these characteristics, leading to variations in oil content.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2262-2273"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origins of steam-mediated selectivity improvement in the oxidative coupling of methane over MnOx-Na2WO4/SiC","authors":"Juan Chen ,&nbsp;Jian-Shu Li ,&nbsp;Anna Zanina ,&nbsp;Wen Jiang ,&nbsp;Yu-Ming Li ,&nbsp;Gui-Yuan Jiang ,&nbsp;Evgenii V. Kondratenko","doi":"10.1016/j.petsci.2025.05.001","DOIUrl":"10.1016/j.petsci.2025.05.001","url":null,"abstract":"<div><div>Oxidative coupling of methane (OCM) is one of the most promising approaches to produce ethylene and ethane (C₂-hydrocarbons) in the post-oil era. The MnO_x-Na₂WO₄/SiO₂ system shows promising OCM performance, which can be further enhanced by cofed steam. However, the positive effect of steam on C₂-hydrocarbons selectivity practically disappears above 800 °C. In the present study, we demonstrate that the use of SiC as a support for MnO_x-Na₂WO₄ is beneficial for achieving high selectivity up to 850 °C. Our sophisticated kinetic tests using feeds without and with steam revealed that the steam-mediated improvement in selectivity to C₂-hydrocarbons is due to the inhibition of the direct CH₄ oxidation to carbon oxides because of the different enhancing effects of steam on the rates of CH₄ conversion to C₂H₆ and CO/CO₂. Other descriptors of the selectivity improvement are MnO_x dispersion and the catalyst specific surface area. The knowledge gained herein may be useful for optimizing OCM performance through catalyst design and reactor operation.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2592-2603"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A dual-model dual-grid upscaling method for solid-based thermal-reactive-compositional flow simulations in fractured oil shale reservoirs","authors":"Qi-Zhi Tan ,&nbsp;Shu-Yang Liu ,&nbsp;Yan-Ji Wang ,&nbsp;Hang-Yu Li ,&nbsp;Jun-Rong Liu ,&nbsp;Wen-Yue Sun","doi":"10.1016/j.petsci.2025.03.027","DOIUrl":"10.1016/j.petsci.2025.03.027","url":null,"abstract":"<div><div>Simulation of thermal-reactive-compositional flow processes is fundamental to the thermal recovery of ultra-heavy hydrocarbon resources, and a typical oilfield practice is the in-situ conversion process (ICP) implemented in oil shale exploitation. However, accurately capturing the intricate flow dynamics of ICP requires a large number of fine-scale grid-blocks, which renders ICP simulations computationally expensive. Apart from that, plenty of oil shale reservoirs contain natural fractures or require hydraulic fracturing to enhance fluid mobility, creating further challenges in modeling pyrolysis reactions in both rock matrices and fractures. Targeted at the above issues, this work proposes a novel dual-model dual-grid upscaling (DDU) method specifically designed for solid-based thermal-reactive-compositional flow simulations in fractured porous media. Unlike existing upscaling techniques, the DDU method incorporates the upscaling of fracture grids using the embedded discrete fracture modeling (EDFM) approach and introduces a new concept of simplified models to approximate fine-scale results, which are used to correct reaction rates in coarse-scale grids. This method uniquely achieves efficient upscaling for both matrix and fracture grids, supports both open-source and commercial simulation platforms without modifying source codes, and is validated through 3D <span>ICP</span> models with natural fractures. The results indicate that the application of the DDU method can provide a close match with the fine-scale simulation results. Moreover, the DDU method has drastically improved the computational efficiency and speeded up the fine-scale simulation by 396–963 times. Therefore, the proposed DDU method has achieved marked computational savings while maintaining high simulation accuracy, which is significant for the development efficiency and production forecasting of oil shale reservoirs.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2478-2492"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genesis and quantitative evaluation of deep petroleum phase diversity in the Tazhong area, Tarim Basin","authors":"Jia-Kai Hou ,&nbsp;Zhi-Yao Zhang ,&nbsp;Guang-You Zhu ,&nbsp;Jian-Fa Han ,&nbsp;Lin-Xian Chi ,&nbsp;Zi-Guang Zhu ,&nbsp;Hong-Bin Li ,&nbsp;Meng-Qi Li ,&nbsp;Rui-Lin Wang","doi":"10.1016/j.petsci.2025.03.020","DOIUrl":"10.1016/j.petsci.2025.03.020","url":null,"abstract":"<div><div>The reservoired petroleum fluids in the deep Ordovician carbonates in the Tazhong area, Tarim Basin, exhibit diverse and intricate geochemical properties and petroleum phases. However, the study on the causal mechanisms for the genesis of co-existed complex petroleum phases and their distribution remains relatively limited. The quantitative assessment of changes in molecular compounds in petroleum pools influenced by secondary alteration to different degrees also needs further investigation. In this study, eight samples including condensate, volatile, and black oil from the Tazhong area were analyzed via GC × GC-TOFMS. The results reveal that condensate oil exhibits complete normal alkane distribution, with abundant diamantanes and organic sulfur compounds (OSCs), and features high density (&gt;0.83 g/cm³), elevated wax content (&gt;20%), and remarkable gas washing loss. The condensate gas is characterized by highly mature oil-cracking gas with a heavy carbon isotope. Geological analysis indicates that the current Ordovician reservoir temperatures generally remain below 140 °C, which is insufficient to induce in-situ oil cracking. Additionally, black oil pools are formed adjacent to the condensate gas pools, suggesting that the latter is not a result of in-situ oil cracking, but rather represents a secondary condensate gas pool formed through gas invasion of a pre-existed oil pool. Based on the loss of <em>n</em>-alkanes and variations in adamantanes (As) and diamantanes (Ds) content across different oil samples, the degree of gas invasion was assessed. We divided gas invasion intensity into strong (Q ≥ 80%, As≥5000 μg/g, Ds ≥ 400 μg/g), weak (20% ≤ Q &lt; 80%, 3000 μg/g ≤ As &lt; 5000 μg/g, 200 μg/g ≤ Ds &lt; 400 μg/g) and negligible (0 ≤ Q &lt; 20%, As &lt; 3000 μg/g, Ds &lt; 200 μg/g). The multistage oil/gas charging events, specifically the sequence of “early oil and late gas” in the Ordovician from the Tazhong area, predominantly drives the phase evolution of reservoired petroleum. Furthermore, differential gas invasion alteration exacerbates the intricacy of petroleum phase distribution. Notably, gas washing processes significantly influence the disparate enrichment of diamondoids homologues in crude oil. Specifically, lower carbon number diamondoids are more abundant in condensate oil, while higher ones exhibit relatively increased abundance in black oil, potentially serving as a valuable quantitative assessment parameter. The findings in this study will provide guiding significance for the analysis and quantitative assessment of deep petroleum phase diversity. Additionally, this research will provide novel insights for comprehensively evaluating basins worldwide with complex petroleum phases distribution.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"22 6","pages":"Pages 2274-2289"},"PeriodicalIF":6.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}