Petroleum Chemistry最新文献

{"title":"Synthesis and Performance Evaluation of a Melamine Resin Filtration Reducer for Saturated Brine Drilling Fluids","authors":"Qiang Chen,&nbsp;Shu-sheng Zhou,&nbsp;Xing-guang Gong","doi":"10.1134/S0965544125601565","DOIUrl":"10.1134/S0965544125601565","url":null,"abstract":"<p>High-performance filtration reducers for saturated brine drilling fluids present a novel alternative for drilling anhydrite and mudstone formations, ensuring operational safety and cost efficiency. Conventional filtration reducers are often limited by poor biotoxicity, necessitating the development of environmentally friendly alternatives. In this study, a novel melamine resin-based filtration reducer (MHAN) has been synthesized, exhibiting exceptional thermal stability (up to 302°C). The addition of 3.0 wt % MHAN has reduced the filtration volume of a saturated brine bentonite-based drilling fluid from 162.2 to 8.2 mL and decreased the filter cake thickness from 3.2 to 0.8 mm demonstrating an excellent filtration control. After aging at 200°C, the saturated brine drilling fluid system containing 5.0 wt % MHAN with a density of 2.3 g/cm³ maintains stable rheology and filtration control performance. Notably, MHAN is sulfur-free and exhibits high environmental compatibility, with an LC₅₀ value of 78,500 mg/L. This eco-friendly melamine resin effectively controls filtration loss in saturated brine drilling fluids, supporting sustainable development of oil and gas resources.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 7","pages":"832 - 842"},"PeriodicalIF":1.1,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Effects of Different Types of Dispersants on Asphaltene Aggregation and on the Stability of Asphaltene Dispersions","authors":"V. K. Korolev,&nbsp;E. S. Iskandarova,&nbsp;A. V. Kosach,&nbsp;R. Z. Safieva","doi":"10.1134/S0965544125601048","DOIUrl":"10.1134/S0965544125601048","url":null,"abstract":"<p>The effects of two different synthetic dispersants were characterized using two independent optical methods. The study examined their impact on both the aggregation of asphaltenes (isolated from various crude oils using a standard procedure) and the stability of model asphaltene-containing dispersions. In the model <i>n</i>-heptane/toluene medium, the two dispersants had markedly different effects on asphaltene aggregation and dispersion stability. One dispersant failed to disperse asphaltenes because it self-associated into large micelles (≥100 nm in radius) in the <i>n</i>-heptane medium, thereby destabilizing the system. Consequently, a key design criterion for future dispersants and stabilizers should be a molecular structure that minimizes self-association in nonpolar media while maximizing affinity for asphaltenes.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 6","pages":"747 - 753"},"PeriodicalIF":1.1,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Onset Points and Kinetics of Asphaltene Aggregation in Model Petroleum Systems: Investigation Using Dynamic Light Scattering and Ultramicroscopy","authors":"V. N. Kuryakov","doi":"10.1134/S0965544125601024","DOIUrl":"10.1134/S0965544125601024","url":null,"abstract":"<p>This paper reports on the determination of a stability threshold for an 0.1 g/L asphaltene solution in toluene with the addition of heptane as a precipitant. For this purpose, ultramicroscopy as well as dynamic and static light scattering methods were employed. Ultramicroscopy has never previously been used to determine stability thresholds in petroleum systems. Using the abovementioned experimental methods, an asphaltene aggregation onset point was identified for the tested asphaltene solution, and a time-dependent trend in mean aggregate size was revealed once the stability threshold was exceeded. The study results show that ultramicroscopy enables rapid onset point determination in model petroleum systems of this type and provides higher sensitivity than dynamic or static light scattering; specifically, it can detect lower concentrations of asphaltene aggregates. A single, bulk addition of heptane above the onset point resulted in diffusion-limited aggregation. In contrast, gradual titration past the stability threshold led to a slower process in which the mean aggregate size increased linearly with time.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 6","pages":"654 - 658"},"PeriodicalIF":1.1,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Viscosity Equations in Oil and Water Wells","authors":"M. Karimi,&nbsp;Behruz Mirzayi,&nbsp;Mohammad Reza Adelzadeh","doi":"10.1134/S096554412560016X","DOIUrl":"10.1134/S096554412560016X","url":null,"abstract":"<p>The equations of viscosity and acid spending capacity characterize the performance of wellhead solvents and fluids, such as gasoil-water wellhead base fluids, and the types of wettability-altering solvents. This study evaluates the properties and interactions in the reservoir layers by deriving the viscosity equations for both oil and water layers. The results from these equations were then applied for the acid spending capacity and overburden pressure equations to demonstrate their role in the damage calculations (water block type) for different rock types. Focusing on the overburden pressure and water block effects, the study investigates the role of viscous and non-viscous chemicals and fluids in both causing and removing damages in various mineral compositions of the porous media. Finally, introducing these new equations, the study outlines key approaches for analyzing and calculating chemical characteristics and behavior in porous media under high-temperature and high-pressure conditions using field and experimental data as the example.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 7","pages":"843 - 852"},"PeriodicalIF":1.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyze the Flexible Property for Pavements with Various Axle Loads and Different Reinforcement Layers","authors":"Meina Subhi Jawad,&nbsp;Ahmed Subhi Abdulijabbar,&nbsp;Makki Kamel Mohsen","doi":"10.1134/S0965544125040139","DOIUrl":"10.1134/S0965544125040139","url":null,"abstract":"<p>Flexible pavements become significant structural elements, which are really vulnerable to the probable damage resulting from various traffic loads and an aggressive environment. In order to bolster the structural strength and prolong the life of pavements, reinforcement layers have been included in the design of most roads and highways. In this research, which is based on numerical simulations, the behavior of flexible pavement with respect to varying loads and with different reinforcement layers will be analyzed. The main objectives of this article are to develop a pavement layers model by utilizing finite element software, which is ABAQUS software package, evaluate the influence of different geogrid properties, location on the induced deformation, stresses, and strains into pavement layers and evaluate the influence of different loading values considering low, medium, and high traffic axle loads. The study reveals that stress on flexible pavements is directly proportional to load force, with stresses reaching 777 KPa at 44 KN and 1390 KPa at 80 kN. Deformations vary, with values ranging from 0.00307 mm at 44 KN to 0.00946 mm at 133 kN.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 5","pages":"537 - 549"},"PeriodicalIF":1.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conditions of the Formation of Stable Water–Petroleum Emulsions in the Presence of Clay Particles","authors":"E. E. Barskaya,&nbsp;Yu. M. Ganeeva,&nbsp;E. S. Okhotnikova,&nbsp;T. N. Yusupova,&nbsp;G. R. Fazylzyanova","doi":"10.1134/S0965544125600420","DOIUrl":"10.1134/S0965544125600420","url":null,"abstract":"<p>The conditions of the formation of stable water–petroleum emulsions stabilized by clay particles were studied. The effect of unmodified and modified montmorillonite on the emulsion stabilization was studied for model systems consisting of pure toluene and distilled water. The clay particles were modified with resin–asphaltene components of the crude oil from the Romashkino oilfield. The influence exerted by the degree of modification and concentration of clay particles on the stability of water–petroleum emulsions was revealed. The degree of modification was estimated from the IR spectra. The resin–asphaltene components modify the surface of clay particles. The degree of modification increases with an increase in the modification time and concentration of petroleum components. Stable emulsion samples were obtained with modified clay particles. The toluene phase in these emulsions is stabilized by clay microparticles, which is characteristic of Pickering emulsions.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 6","pages":"685 - 695"},"PeriodicalIF":1.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and Rheological Behaviors and Aggregation of Thermally Pretreated Highly Paraffinic Crude Oils","authors":"Yu. V. Loskutova,&nbsp;L. V. Chekantseva,&nbsp;N. V. Yudina","doi":"10.1134/S0965544125601036","DOIUrl":"10.1134/S0965544125601036","url":null,"abstract":"<p>The paper describes the structural and rheological investigation of two thermally pretreated highly paraffinic resinous crude oils, specifically the oils from the South-Maiskoye oil field (SM) and from the Archinskoye oil and gas condensate field (AR). Pretreating SM (asphaltene/resin ratio ≈ 0.09) at 40°C induced an anomalous rise in both viscosity–temperature behavior and asphalt–resin–paraffin deposit (ARPD) formation—in contrast to pretreatment of the same oil at 10, 20, and 60°C. For AR (with its asphaltene/resin ratio of about 0.23), elevating the pretreatment temperature to 60°C decreased the viscosity and pour point and increased the concentrations of resinous-asphaltenic components and solid <i>n</i>-alkanes in the ARPDs. Photon correlation spectroscopy revealed a spontaneous growth of aggregates when the SM oil was cooled from 35 to 25°C. Cooling the AR oil from 50 to 35°C generated large and small aggregates simultaneously.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 6","pages":"674 - 684"},"PeriodicalIF":1.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrotalcite-Derived Catalysts Based on Al, Mg, and Ni Hydroxides with Untypical Nickel Loadings: Effects of Ni Loading on Textural Properties and Catalytic Performance in Dry Reforming of Methane to Syngas","authors":"A. G. Dedov,&nbsp;A. S. Loktev,&nbsp;E. V. Ermakov,&nbsp;M. A. Bykov,&nbsp;A. A. Sadovnikov,&nbsp;K. A. Cherednichenko","doi":"10.1134/S0965544125600407","DOIUrl":"10.1134/S0965544125600407","url":null,"abstract":"<p>A series of low-nickel (0.7–2.9 wt %) catalysts for dry reforming of methane (DRM) were prepared from specially synthesized hydrotalcite-derived nickel–aluminum–magnesium hydroxo salts. The texture and catalytic performance of these materials were found to depend on the Ni loading in the precursor hydroxo salts. Under DRM conditions, the 2.9 wt % Ni precursor evolved into a layered catalyst that contained non-uniformly dispersed metallic Ni nanoparticles. The catalysts developed from lower-Ni samples showed dense homogeneous textures and uniform dispersion of metallic Ni. While the 2.9 wt % Ni catalyst achieved high product yields at 900°C (94–97% CO, 92–96% H₂), it was particularly susceptible to carbon deposition. The catalysts evolved from the 0.7 and 1.8 wt % Ni precursors demonstrated lower coking levels. Moreover, while lowering the Ni loading somewhat decreased syngas yields, it enhanced the CO and H₂ productivity per gram of nickel. Even at 600°C the catalysts still exhibited appreciable productivity.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 7","pages":"778 - 787"},"PeriodicalIF":1.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution Patterns of the Main Structural-Group Parameters of Crude Oils from the Timan–Pechora Oil-and-Gas Basin According to 13C NMR Data","authors":"M. B. Smirnov,&nbsp;N. A. Vanyukova","doi":"10.1134/S0965544125600341","DOIUrl":"10.1134/S0965544125600341","url":null,"abstract":"<p>Using ¹³C NMR spectroscopy, a representative set of crude oils and gas condensates (75 samples from 51 oil fields) from the Timan–Pechora oil and gas basin (OGB) was investigated. The structural-group composition of crude oils, and specifically the total concentrations of aromatic and <i>n</i>-alkyl moieties, were identified for the first time over the entire basin. Distribution density plots were presented for all the composition parameters measured. It was demonstrated that, because all the parameters exhibit polymodal distribution and substantially deviate from normal, a nonparametric statistical analysis is needed for the data processing. In particular, medians and median confidence intervals, rather than means or root-mean-square deviations, should be relied upon. When compared to the crude oil composition in the previously explored OGBs, the Timan–Pechora crudes were found to be closest to the West Siberian OGB. A considerable difference in aromaticity was observed compared to the East Siberian and North Caucasus oils. An equally large difference between the Timan–Pechora and North Caucasus oils was found for the <i>n</i>-alkyl composition characteristics. The average length of <i>n</i>-alkyl moieties in the Timan–Pechora OGB markedly exceeds that in the East Siberian crudes. When compared to the Volga–Urals basin, the Timan–Pechora oils exhibit a relatively small (although statistically significant) difference in aromaticity and a similar content of <i>n</i>-alkyl moieties. As was the case in an ¹H NMR investigation of the same oils that was carried out previously, the Timan–Pechora OGB was classified into four major tectonic groups: the Varandei–Adzva zone, Khoreivei depression, and Kos’yu-Rogovskaya depression; the Izhma–Pechora syneclise and Upper Pechora depression; the Pechora–Kozhva aulacogen; and the East Timan megaswell. Furthermore, the crude oils from Triassic and Permian reservoirs were considered separately from those from Devonian reservoirs. For the majority of composition parameters, only small (although statistically significant) differences were found between most crude oil groups: significance levels in the range of 0.01–0.05 prevailed over those between 0.001 and 0.01. Among Devonian deposits, crude oils from the Pechora–Kozhva aulacogen stand out for their lower aromaticity.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 6","pages":"635 - 643"},"PeriodicalIF":1.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Source Rock Characterization for the Hydrocarbon Generative Potential and Thermal Maturity of Carboniferous Strata in the Tendrara–Missour Basin, Northeastern Morocco","authors":"Achour Margoum,&nbsp;Youssef Elbouazaoui,&nbsp;Mohammed Et-Touhami,&nbsp;Rabah Bouchta,&nbsp;Abdelwahid Chakor Alami","doi":"10.1134/S0965544124602540","DOIUrl":"10.1134/S0965544124602540","url":null,"abstract":"<p>The Tendrara–Missour Basin in eastern Morocco hosts the country's largest gas field, featuring a proven petroleum system with Paleozoic source rocks and a Triassic siliciclastic reservoir sealed by Late Triassic and Early Jurassic salt formations. This study evaluated the hydrocarbon generative potential and thermal maturity of Carboniferous source rocks via geochemical analysis of 215 samples from four wells (OSD-1, TE-1, TE-2, and TE-3). The results indicate that the majority of the samples were characterized by a poor to fair content of organic matter, with the total organic carbon (TOC) values less than 1%. These samples were composed mainly of type III (gas prone) and type IV (non-generative) kerogen, with the hydrogen index (HI) &lt; 150 mg HC/g TOC. However, certain intervals, particularly in the OSD-1 well, displayed excellent source rock characteristics with the TOC values exceeding 4% and a mixture of the type II/III kerogen with the HI values exceeding 150 mg HC/g TOC. The maturity levels across the well ranged from immature to post-mature, with vitrinite values varied within 0.58–2.56%. The burial history modeling in the OSD-1 and TE-3 wells indicated that the hydrocarbon generation from the Carboniferous source rocks started during the Late Carboniferous–Permian period, i.e., during the Hercynian orogeny. Volumetric calculations based on the Monte Carlo simulation estimated the generative potential of the Carboniferous source rocks to be approximately 200 000 tons/km² (P50). The accumulated volumes derived from the Carboniferous source rocks (P50) are estimated at approximately 300 million barrels of oil and 2.5 trillion cubic feet (TCF) of gas.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 6","pages":"659 - 673"},"PeriodicalIF":1.1,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}