Petroleum Science最新文献

{"title":"Bifunctional heterojunction catalyst adsorption-promoted catalytic oxidation of aromatic sulfides high-value conversion","authors":"Zhen-Dong Yu,&nbsp;Peng Cui,&nbsp;Kai-Kai Li,&nbsp;Su-Hang Xun,&nbsp;Hao-Feng Wu,&nbsp;Yi-Ru Zou,&nbsp;Xiao-Xiao Xing,&nbsp;Xiao-Xiao Yu,&nbsp;Pei-Wen Wu,&nbsp;Wen-Shuai Zhu","doi":"10.1016/j.petsci.2026.04.005","DOIUrl":"10.1016/j.petsci.2026.04.005","url":null,"abstract":"<div><div>With the increasing need for high-value utilization of diesel components, catalytic oxidative desulfurization (ODS) emerges as an efficient non-hydrogenation approach to desulfurization and utilization of aromatic sulfides. Although TiO₂ is a promising candidate for ODS, the catalytic activity is limited. Herein, with the heterojunction interface formation, a series of TiO₂/three-dimensional porous carbon nitride catalysts (Ti/3D g-C₃N₄) has been developed for ODS. Notably, the successful construction of the type II heterojunction between TiO₂ and 3D g-C₃N₄ is confirmed through systematic characterizations. The bandgap is narrowed in the hybrid materials, accelerating the electron transfer from the N to the Ti center, conducive to the activation of hydrogen peroxide in the radical pathway. Also, the emergence of micro-mesoporous pores in 3D g-C₃N₄ enhances the adsorption mass transfer of aromatic sulfides. The synergistic effect between heterostructures and extended mesopores generates superoxide radicals, attaining &gt;99% adsorption-promoted catalytic oxidation reactivity of aromatic sulfides. The work develops bifunctional heterogeneous materials of efficient adsorption-promoted catalytic oxidation, expanding the development for the high-value utilization of sulfides in diesel fuel.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5972-5983"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Techno-economic feasibility evaluation framework for reverse-flow retrofitting in multi -product pipelines aimed at benefit augmentation","authors":"Ming-Yue Huang,&nbsp;Ren-Fu Tu,&nbsp;Qi Liao,&nbsp;Xiao-Meng Bai,&nbsp;Zheng-Bing Li,&nbsp;You-Yi Liang,&nbsp;Si-Ya Cai,&nbsp;Yong-Tu Liang","doi":"10.1016/j.petsci.2026.05.036","DOIUrl":"10.1016/j.petsci.2026.05.036","url":null,"abstract":"<div><div>As China's energy transition advances, optimizing flow direction in multi-product pipelines becomes critical to accommodate structural shifts in oil consumption, particularly reverse-flow operations. Normally, pipelines adopt a large-to-small diameter design to match declining flowrates, but reverse-flow disrupts this arrangement, leading to a substantial drop in transport capacity, the reconstruction of pressure and contamination control strategies. Therefore, this paper proposes an economic evaluation framework for the reverse-flow multi-product pipelines. Based on pipeline flowrate constraints, a model is constructed, with a flowrate interval expansion factor introduced to retrofit pipe segments and enhance reverse-flow capacity. Within the model, the nonlinear flowrate-pipe diameter relationship is addressed via piecewise linearization, while a correction method minimizes approximation errors. Taking a pipeline as a case study, the sensitivity analysis of factors impacting the economic performance of renovation project is conducted. The results show, i) minor renovations increase transport capacity of reverse-flow by 39% measured by total turnover volume. ii) The net benefit of renovation project is most sensitive to unit price of pipeline transportation, which the investment becomes viable when unit price of pipeline transportation exceeds 0.1755 <span><math><mrow><mtext>CNY</mtext><mo>/</mo><mrow><mo>(</mo><mrow><mi>t</mi><mo>·</mo><mtext>km</mtext></mrow><mo>)</mo></mrow></mrow></math></span>. iii) Compared with the normal rule, the proposed framework increases transportation revenue by 19.97%–20.29%. iv) Compared with the pre-renovation condition, the potential for economic benefit growth ranging from approximately 27.93% to 31.21%. v) When model parameters such as flowrate interval expansion factor and economic velocity fall within reasonable ranges, the renovation scheme is valid. This study optimizes reverse-flow capacity through multi-modal control strategies and corrects the diameter of pipe segments, enhancing operational flexibility and efficiency in pipeline networks and providing a cost-optimized renovation solution for pipe segments. Future studies should prioritize real-time updating and feedback mechanisms for pipeline capacity during flow-direction optimization.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5870-5886"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A low-dimensional dynamic model for slug elimination in pipeline-riser system","authors":"Han-Xuan Wang,&nbsp;Tian-Yu Liu,&nbsp;Sui-Feng Zou,&nbsp;Jie Sun,&nbsp;Lie-Jin Guo","doi":"10.1016/j.petsci.2026.07.016","DOIUrl":"10.1016/j.petsci.2026.07.016","url":null,"abstract":"<div><div>A low-dimensional model for slug elimination is established to improve the applicability and accuracy of current models. Inspired by the flow stages of severe slug flow, the model in this paper is divided into three distinct flow stages—slug growth, liquid production, and blowout stages—to accurately capture the flow behaviors of severe slugging flow. For high-pressure operating conditions, a multiphase valve model considering phase slip and critical flow is analyzed and applied to expand the application boundary of the low-dimensional model. The new model and the state-of-the-art low-dimensional model reported in the literature are compared in detail with the results from experiments and the OLGA simulator. The results show that the new model can well simulate the flow behaviors of SS1 and SS2. In the three validation conditions, the absolute values of the mean relative errors of the new (old) model for the simulation of flow cycle, riser pressure drop, and inlet pressure are 2.67% (103.52%), 6.51% (22.88%), and 2.84% (11.31%), respectively.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5887-5907"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic evolution of non-uniform water invasion in deformed multi-scale porous media retrieved by computed tomography","authors":"Fang-Zhou Liu,&nbsp;Dai-Gang Wang,&nbsp;Yu-Shan Ma,&nbsp;Ning-Hong Jia,&nbsp;Jun-Lei Wang,&nbsp;Chao-Zhong Qin,&nbsp;Fa Zhang,&nbsp;Kao-Ping Song,&nbsp;Yu-Hua Liu,&nbsp;Cheng-Ming Li","doi":"10.1016/j.petsci.2026.04.028","DOIUrl":"10.1016/j.petsci.2026.04.028","url":null,"abstract":"<div><div>Ultra-deep sandstone gas reservoirs have great potential for exploration and development and have become a major focus worldwide. Under the influence of ultra-high temperature, pressure and strong in-situ stress, the mechanical properties of rocks change significantly, resulting in the coexistence of diverse pores and fractures. This rock deformation, coupled with severely non-uniform water invasion, fundamentally hinders efficient reservoir development by promoting preferential flow channeling and early water breakthrough, which reduce sweep efficiency and increase remaining gas retention. In this paper, a microfocus CT scanning experiment is conducted on ultra-deep rock under in-situ stress loading. Based on the acquired scans, three-dimensional digital cores representing the deformed multi-scale fracture-pore media are reconstructed under various stress conditions. Dynamic pore network simulations are performed to systematically investigate gas-water migration and distribution characteristics under the effects of stress, displacement pressure difference and fracture conductivity. The research shows that stress is the most critical factor governing the water invasion process. In the absence of applied stress, water preferentially invades well-connected pores, exhibiting a regular front and fast migration rate, while gas remains in small, poorly connected blind pores. When the stress is loaded to the linear elastic deformation stage, the core exhibits increased radial deformation, and pronounced dynamic changes occur during the water invasion process. Remaining gas easily accumulates in isolated pores at corner or dead-end regions, and a large amount of remaining gas appears in regions with low driving force. Upon reaching the plastic deformation stage, localized fracturing occurs, which increases the number of throats and enhances connectivity. This leads to a transition of the water invasion mode from uniform to non-uniform. In the fracture stage, the water phase preferentially moves along the fracture surface rapidly, thereby accelerating the water invasion process. The local pressure distribution between the fracture and the matrix is uneven, inducing the wetting phase fluid to continuously seep from the fracture into the matrix, expanding the swept range. Fracture conductivity directly affects the migration speed and morphology of the water invasion front, but its impact on the final water invasion effect is weak.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5723-5737"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel abnormal pore pressure prediction framework based on machine learning and drilling–rock mechanics parameter data","authors":"Hua-Yang Li,&nbsp;Quan-You Liu,&nbsp;Jia-Ao Chen,&nbsp;Yan-Chao Pang,&nbsp;Fu-Zhi Chen,&nbsp;Dan-Tong Liu,&nbsp;Ze-Hui Shi","doi":"10.1016/j.petsci.2026.06.002","DOIUrl":"10.1016/j.petsci.2026.06.002","url":null,"abstract":"<div><div>The Xihu Sag in the East China Sea Shelf Basin exhibits complex geology (e.g., deep faulting and fragmented pressure systems) and anomalous overpressure with pressure reversal in target formations, posing severe challenges to conventional pore pressure prediction methods. This study proposes an integrated framework for pore pressure prediction that fuses nine drilling parameters with three rock mechanical parameters. The framework overcomes the common limitation of previous studies relying on a single data source (well log or seismic data). Model development and validation are demonstrated using eight vertical wells across three blocks in the Xihu Sag. Five machine learning (ML) algorithms (Back Propagation, K-Nearest Neighbor, Support Vector Regression, CatBoost, LightGBM) are optimized, with a detailed investigation of dataset partitioning strategies (direct vs. randomized division) to eliminate high-pressure prediction bias. Comprehensive evaluation via six metrics (mean squared error (MSE), mean absolute error (MAE), mean absolute percentage error (MAPE), etc., including training time) demonstrates that the LightGBM model outperforms the others: it achieves near-perfect fitting (<em>R</em>² = 0.999), minimal prediction errors (MSE = 0.001, MAPE = 0.239%), and short training time (0.45 s), with a narrow relative error range (−1.83% to +1.61%) for both normal and overpressure zones. Practical validation on an adjacent well and four regional wells confirms its robust generalization (average accuracy &gt;97%), with its prediction results consistent with the “normal pressure–overpressure–pressure reversal” distribution pattern of the target block. Importantly, the ML model is successfully applied to two adjacent structural units and, without any parameter adjustment, maintains prediction accuracy above 92%. This work provides a high-precision, field-applicable pore-pressure prediction tool that mitigates drilling risks and offers a reproducible reference framework for pore pressure prediction in other similar complex overpressured basins.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5359-5383"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OBC","authors":"","doi":"10.1016/S1995-8226(26)00539-X","DOIUrl":"10.1016/S1995-8226(26)00539-X","url":null,"abstract":"","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Page OBC"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Micron- to meter-scale shale oil migration differentiation and mobility effects: New insights into high-mobility migration sweet spot and sustainable shale oil recovery","authors":"Fu-Wei Wang,&nbsp;Ru-Kai Zhu,&nbsp;Dong-Xia Chen,&nbsp;Bin Bai,&nbsp;Chang Liu,&nbsp;Meng-Ya Jiang,&nbsp;Ren-Zeng Wanma,&nbsp;Qiao-Chu Wang,&nbsp;Yu-Chao Wang,&nbsp;Lan-Xi Rong,&nbsp;Yu-Qi Wang,&nbsp;Chen Liu,&nbsp;Khawaja-Hasnain Iltaf,&nbsp;Zhang-Xin Chen","doi":"10.1016/j.petsci.2026.07.021","DOIUrl":"10.1016/j.petsci.2026.07.021","url":null,"abstract":"<div><div>Understanding multiscale migration differentiation within shale oil systems is critical for identifying high-mobility migration sweet spots that facilitate the sustainable shale oil recovery. However, owing to geological complexity and technical uncertainty, the chemical differentiation and mobility effects of shale oil migration have not been clarified. This study is focused on elucidating the μm–m-scale migration differentiation and mobility effects in shale oil systems by combining multiple methods, including laser scanning confocal microscopy (LSCM), nuclear magnetic resonance (NMR), multi-temperature pyrolysis, and extract geochemical analysis. Core samples collected nearly equidistantly from the Triassic Chang 7 Member shale system in the Ordos Basin are employed for investigation. The LSCM results reveal that interlaminar shale oil migration on the μm–mm scale manifests in the form of light/heavy component differentiation. However, cm–m-scale migration across laminae assemblages (or lithofacies) corresponds to pyrolysis parameter anomalies, original–true hydrocarbon generation potential differences, chemical compositions and n-alkane differentiation. The migration hydrocarbon inputs can improve the <em>in situ</em> oil composition and movable oil content, thus affecting shale oil mobility. The mobility disparities between source–reservoir units in a shale oil system are primarily controlled by the degree of migration differentiation. Notably, the good source–good reservoir laminated units at the μm–mm scale and the thick source–thick reservoir configurations at the cm–m scale exhibit relatively strong migration differentiation and favorable mobility improvement. These mobility patterns associated with μm–m migration differentiation are critical for evaluating high-mobility sweet spots and developing cost-effective and sustainable shale oil systems.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5292-5318"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research progress and development prospects on critical challenges in deepwater riserless drill string dynamics","authors":"Rong-Jie Wu,&nbsp;Xiao-Qiang Guo,&nbsp;Xin-Ye Li,&nbsp;Liang He,&nbsp;Yue-Chao Liu,&nbsp;Chao-Qun Xia","doi":"10.1016/j.petsci.2026.04.046","DOIUrl":"10.1016/j.petsci.2026.04.046","url":null,"abstract":"<div><div>With the ongoing expansion of oil and gas drilling into deeper waters, riserless drilling technology has shown prominent advantages in deepwater drilling applications. The structural design and operational mechanism of riserless drilling make drill strings more vulnerable to stochastic ocean loads, requiring thorough investigation of critical factors influencing drill string dynamics in deepwater riserless operations to maintain drilling stability. Accordingly, this work initially synthesizes computational approaches for drill string external loads, elucidating how multiphysics-coupled loading mechanisms impact both drilling safety and operational efficiency. Furthermore, this work investigates fundamental challenges in drill string dynamics, including riser vortex-induced vibrations (VIV) in water columns and nonlinear drill string vibrations in formation sections, establishing connections between oceanic loads and traditional drilling dynamics. Moreover, this work systematically evaluates both active and passive vibration mitigation techniques, including VIV suppression for marine riser segments and formation vibration control methodologies. This work concludes by examining next-generation drilling control systems that feature intelligent data transmission, data-driven modeling, and smart control technologies. These elements collectively form a “perception-modeling-control” closed-loop system to overcome the time-delay limitations of traditional methods. The findings establish a theoretical foundation for deepwater drilling parameter optimization, safety risk mitigation, and efficiency improvement.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5572-5592"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competitive fracture propagation in Da’an deep shale: A study based on multi-adjacent well collaborative distributed optical fiber monitoring","authors":"Jin-Yang Xie,&nbsp;Bing Hou,&nbsp;Yong-Chun Wu,&nbsp;Le He,&nbsp;Ju-Hui Zhu,&nbsp;Wei Gong,&nbsp;Cai-Bao Wang","doi":"10.1016/j.petsci.2026.04.053","DOIUrl":"10.1016/j.petsci.2026.04.053","url":null,"abstract":"<div><div>The competitive propagation of hydraulic fractures during multi-cluster stimulations poses a critical challenge to achieving effective reservoir stimulation in deep shale formations. To address this, our study integrates true triaxial physical simulations with an innovative multi-adjacent well collaborative distributed fiber-optic monitoring strategy. Applied to the deep Longmaxi shale, this approach facilitates full three-dimensional, dynamic tracking of strain evolution, thereby elucidating the mechanisms that govern fracture competition under in-situ stress conditions. The results delineate two distinct fracture architectures dictated by the prevailing stress regime. When the maximum horizontal stress dominates, a cross-shaped network of orthogonal transverse and bedding fractures develops. Conversely, under vertical stress dominance, the combined effects of stress shadowing and geological discontinuities promote the formation of step-like main fractures alongside backward-extending inclined branches. The synchronized interpretation of distributed strain-rate signals—characterized by distinctive patterns such as asymmetric heart-shaped and V-shaped fingerprints—and pump pressure curves elucidates the dynamic process of cluster interaction. This transforms fiber-optic sensing from a monitoring tool into a quantitative diagnostic platform for competitive fracturing. The findings establish a theoretical foundation for designing three-dimensional monitoring frameworks, optimizing cluster spacing, and enabling adaptive pumping strategies, directly supporting the efficient development of deep shale gas resources.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Pages 5593-5609"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IBC","authors":"","doi":"10.1016/S1995-8226(26)00538-8","DOIUrl":"10.1016/S1995-8226(26)00538-8","url":null,"abstract":"","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"23 9","pages":"Page IBC"},"PeriodicalIF":6.4,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}