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Heterocene Catalysts for Copolymerization of Hex-1-ene and Polar Vinyl Monomers
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-12-03 DOI: 10.1134/S0965544124060161
G. I. Sadrtdinova, V. I. Ovchinnikova, P. D. Komarov, S. O. Ilyin, Alexander A. Vinogradov, Alexey A. Vinogradov, P. V. Ivchenko, I. E. Nifant’ev
{"title":"Heterocene Catalysts for Copolymerization of Hex-1-ene and Polar Vinyl Monomers","authors":"G. I. Sadrtdinova,&nbsp;V. I. Ovchinnikova,&nbsp;P. D. Komarov,&nbsp;S. O. Ilyin,&nbsp;Alexander A. Vinogradov,&nbsp;Alexey A. Vinogradov,&nbsp;P. V. Ivchenko,&nbsp;I. E. Nifant’ev","doi":"10.1134/S0965544124060161","DOIUrl":"10.1134/S0965544124060161","url":null,"abstract":"<p>The paper proposes a series of promising Zr(IV) complexes and experimentally confirms that, when activated with minimal amounts of modified metylaluminoxane MMAO-12 ([Al]/[Zr] ~20–40), these complexes are able to initiate copolymerization of hex-1-ene with polar vinyl monomers FG-(CH<sub>2</sub>)<sub>8</sub>CH=CH<sub>2</sub> [where FG is a functional group selected from C(O)NMe<sub>2</sub>, CH<sub>2</sub>OSiMe<sub>3</sub>, C(O)O<sup><i>i</i></sup>Pr, and CH<sub>2</sub>OH]. The prepared copolymers were characterized by <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy, size exclusion chromatography, and differential scanning calorimetry. Isotactic copolymers of hex-1-ene with 10-undecen-1-ol with polar comonomer content up to 32.2 mol % have been synthesized for the first time. An investigation of the adhesive properties of the prepared copolymers has shown that incorporating 10-undecen-1-ol enhances the adhesive fracture energy by a factor of 32 compared to the respective homopolymer.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 11","pages":"1253 - 1265"},"PeriodicalIF":1.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373223","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}
引用次数: 0
Retraction Note: Controlled Template Synthesis and Properties of Cobalt Nanotubes
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-11-18 DOI: 10.1134/S0965544124060136
A. L. Kozlovskiy, D. I. Shlimas, A. A. Mashentseva, M. V. Zdorovets, K. K. Kadyrzhanov
{"title":"Retraction Note: Controlled Template Synthesis and Properties of Cobalt Nanotubes","authors":"A. L. Kozlovskiy,&nbsp;D. I. Shlimas,&nbsp;A. A. Mashentseva,&nbsp;M. V. Zdorovets,&nbsp;K. K. Kadyrzhanov","doi":"10.1134/S0965544124060136","DOIUrl":"10.1134/S0965544124060136","url":null,"abstract":"","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 10","pages":"1233 - 1233"},"PeriodicalIF":1.3,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108772","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}
引用次数: 0
Ni2P/Al2O3-SAPO-11 Catalysts for Hydroprocessing of Methyl Palmitate: A Comparative Investigation of Synthesis Methods
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-11-15 DOI: 10.1134/S096554412406015X
I. V. Shamanaev, E. N. Vlasova, I. V. Yakovlev, A. Yu. Fedorov, V. P. Pakharukova, E. Yu. Gerasimov, G. A. Bukhtiyarova
{"title":"Ni2P/Al2O3-SAPO-11 Catalysts for Hydroprocessing of Methyl Palmitate: A Comparative Investigation of Synthesis Methods","authors":"I. V. Shamanaev,&nbsp;E. N. Vlasova,&nbsp;I. V. Yakovlev,&nbsp;A. Yu. Fedorov,&nbsp;V. P. Pakharukova,&nbsp;E. Yu. Gerasimov,&nbsp;G. A. Bukhtiyarova","doi":"10.1134/S096554412406015X","DOIUrl":"10.1134/S096554412406015X","url":null,"abstract":"<p>A series of Ni<sub>2</sub>P catalysts on an Al<sub>2</sub>O<sub>3</sub>-SAPO-11 composite support were synthesized by two different methods: reduction of Ni and P precursors by hydrogen at elevated temperatures (<b>TPR</b>); and phosphidation of supported Ni metallic particles by triphenylphosphine (<b>PPh3</b>). For loading active components, aqueous solutions prepared from different precursors (specifically, Ni(OAc)<sub>2</sub> and (NH<sub>4</sub>)<sub>2</sub>HPO<sub>4</sub>; Ni(OH)<sub>2</sub> and H<sub>3</sub>PO<sub>3</sub>; and Ni(OAc)<sub>2</sub> and H<sub>3</sub>PO<sub>2</sub>) were used in the first case, and a Ni(OAc)<sub>2</sub> solution was used in the second. The catalysts were characterized by chemical analysis, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, XRD, TEM, XPS, and <sup>27</sup>Al M­­AS NMR. The catalyst performance was tested in hydroprocessing of a model compound of fatty acid triglycerides, specifically methyl palmitate (<b>MP</b>). The formation of a Ni<sub>2</sub>P phase was confirmed by XRD, TEM, and XPS; moreover, the synthesis method was found to affect the localization of Ni<sub>2</sub>P nanoparticles. It was further revealed that, in the TPR method, the particles are predominantly located on the Al<sub>2</sub>O<sub>3</sub> surface, whereas the PPh3 method produces particles on the surfaces of both Al<sub>2</sub>O<sub>3</sub> and SAPO-11. The main MP conversion products are <i>n</i>- and <i>iso</i>-alkanes (C<sub>15</sub> and C<sub>16</sub>). At 100% conversion of oxygenates, the PPh3-synthesized catalyst achieved a higher <i>iso</i>-alkane selectivity (63%) than the TPR-prepared samples (2–21%).</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 11","pages":"1242 - 1252"},"PeriodicalIF":1.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373294","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}
引用次数: 0
Catalytic Conversion of Polyethylene and Polypropylene Wastes to Light Olefins
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-11-15 DOI: 10.1134/S0965544124060185
A. A. Rogacheva, V. R. Atlasov, K. I. Dement’ev, T. A. Palankoev, P. S. Kuznetsov
{"title":"Catalytic Conversion of Polyethylene and Polypropylene Wastes to Light Olefins","authors":"A. A. Rogacheva,&nbsp;V. R. Atlasov,&nbsp;K. I. Dement’ev,&nbsp;T. A. Palankoev,&nbsp;P. S. Kuznetsov","doi":"10.1134/S0965544124060185","DOIUrl":"10.1134/S0965544124060185","url":null,"abstract":"<p>The study investigates catalytic conversion of polyethylene and polypropylene—in the form of 1–5 wt % solutions in vacuum distillate—to light olefins in the presence of a catalyst based on a mixture of zeolites Y and ZSM-5. The effects of reaction conditions and polymer pretreatment methods on the conversion degree and product selectivity are discussed. At 675°C quantitative conversion of the polyolefins was achieved, and the products mainly consisted of C<sub>2</sub>–C<sub>4</sub> light olefins. The cracking of the polymer solutions enhanced the yield of light olefins compared to the pure vacuum distillate case, the enhancement reaching up to 9.9 wt %, including 5.2 wt % for propylene.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 11","pages":"1235 - 1241"},"PeriodicalIF":1.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373292","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}
引用次数: 0
Effects of Synthesis Method on the Physicochemical Properties and Catalytic Activity of BEA Zeolite in Toluene Disproportionation 合成方法对BEA沸石甲苯歧化理化性质及催化活性的影响
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-10-30 DOI: 10.1134/S096554412406001X
O. A. Ponomareva, E. P. Andriako, A. P. Dubtsova, N. K. Vdovchenko, V. A. Vorobkalo, I. V. Dobryakova, L. I. Rodionova, O. V. Shutkina, I. I. Ivanova
{"title":"Effects of Synthesis Method on the Physicochemical Properties and Catalytic Activity of BEA Zeolite in Toluene Disproportionation","authors":"O. A. Ponomareva,&nbsp;E. P. Andriako,&nbsp;A. P. Dubtsova,&nbsp;N. K. Vdovchenko,&nbsp;V. A. Vorobkalo,&nbsp;I. V. Dobryakova,&nbsp;L. I. Rodionova,&nbsp;O. V. Shutkina,&nbsp;I. I. Ivanova","doi":"10.1134/S096554412406001X","DOIUrl":"10.1134/S096554412406001X","url":null,"abstract":"<p>A series of BEA-type zeolites with SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratios of about 50 were synthesized by steam-assisted (SAC) and hydrothermal crystallization (HTC) in fluoride and alkaline media. Their physicochemical properties were characterized by low-temperature nitrogen adsorption, XRD, SEM, XRF, and NH<sub>3</sub>-TPD. The catalytic performance was investigated in liquid-phase toluene disproportionation. The SAC-synthesized samples were distinguished by a higher concentration of acid sites. The BEAs prepared by SAC in alkaline media exhibited a higher activity in toluene disproportionation. The samples synthesized in fluoride media, both by steam-assisted and hydrothermal crystallization, proved to be comparable in activity.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 9","pages":"1130 - 1137"},"PeriodicalIF":1.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889776","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}
引用次数: 0
Template-Free Synthesis of ZSM-5: Effect of Precursor Composition on the Crystallinity and Crystal Morphology ZSM-5的无模板合成:前驱体组成对结晶度和晶体形态的影响
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-10-30 DOI: 10.1134/S0965544124060033
A. A. Bragina, K. A. Babina, A. V. Kasyanov, E. V. Parkhomchuk
{"title":"Template-Free Synthesis of ZSM-5: Effect of Precursor Composition on the Crystallinity and Crystal Morphology","authors":"A. A. Bragina,&nbsp;K. A. Babina,&nbsp;A. V. Kasyanov,&nbsp;E. V. Parkhomchuk","doi":"10.1134/S0965544124060033","DOIUrl":"10.1134/S0965544124060033","url":null,"abstract":"<p>A series of ZSM-5 samples were synthesized by template-free hydrothermal synthesis without adding seed crystals. When synthesis parameters such as temperature, duration, and molar ratio of components being equal, various silicas (specifically, Silica-Fumed from Sigma-Aldrich; Rosil-175 from the Bashkir Soda Company (BSC), Russia; Silica from the Salavat Catalyst Plant (SCP), Russia; and Aerosil-300 from Evonik, Germany) and of aluminum (Al(NO<sub>3</sub>)<sub>3</sub>∙9H<sub>2</sub>O and NaAlO<sub>2</sub>) were varied. In the presence of sodium aluminate, highly crystalline ZSM-5 samples were synthesized, whereas the use of aluminum nitrate led to an amorphous product due to accelerating aluminosilicate condensation. The ZSM-5 crystals prepared from various SiO<sub>2</sub> sources have different morphology, including the crystal size (ranging from 5.9 to 12.2 µm) and the aspect ratio (from 1.9 to 2.6). The ZSM-5 samples synthesized from available Russian-manufactured SiO<sub>2</sub> sources (Rosil-175 (BSC) and Silica (SCP)) in the presence of sodium aluminate consisted of crystals with average sizes of 5.9 and 6.9 μm, respectively, and a narrow particle size distribution (<i>c</i><sub>v</sub> &lt; 20%).</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 9","pages":"1063 - 1069"},"PeriodicalIF":1.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889774","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}
引用次数: 0
Catalytic Activity of Tandem Catalysts Based on ZnGa2O4 and MFI Zeolite in CO2 Hydrogenation ZnGa2O4 - MFI分子筛串联催化剂在CO2加氢中的催化活性
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-10-30 DOI: 10.1134/S0965544124060070
G. K. Ivanov, A. A. Maerle, D. O. Bachurina, I. V. Dobryakova, I. I. Ivanova
{"title":"Catalytic Activity of Tandem Catalysts Based on ZnGa2O4 and MFI Zeolite in CO2 Hydrogenation","authors":"G. K. Ivanov,&nbsp;A. A. Maerle,&nbsp;D. O. Bachurina,&nbsp;I. V. Dobryakova,&nbsp;I. I. Ivanova","doi":"10.1134/S0965544124060070","DOIUrl":"10.1134/S0965544124060070","url":null,"abstract":"<p>A series of tandem catalysts based on a ZnGa<sub>2</sub>O<sub>4</sub> spinel and on MFI-type acidic components with varying SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratios were prepared by mechanical mixing at a spinel to MFI weight ratio of 2 : 1. These catalysts were tested in the conversion of carbon dioxide to olefins at 380°C and 27 bar. The hydrogenating component (ZnGa<sub>2</sub>O<sub>4</sub>) was prepared by co-precipitation of the corresponding hydroxides followed by heat treatment. The zeolites were synthesized by steam-assisted crystallization. A reference catalyst was prepared from ZnGa<sub>2</sub>O<sub>4</sub> and a hydrothermally synthesized commercial zeolite CBV28014. The physicochemical properties of the catalysts and their components were characterized by low-temperature nitrogen adsorption–desorption, chemical analysis, NH<sub>3</sub>-TPD, H<sub>2</sub>-TPR, XRD, and SEM. The sample with the highest SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio (250) achieved the highest CO<sub>2</sub> conversion; this parameter dropped as the aluminum content in the samples increased. The highest selectivity towards light olefins was observed for the catalyst with SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> = 172 in the acidic component, likely because this zeolite had an optimum acidity for the production of light olefins.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 9","pages":"1138 - 1146"},"PeriodicalIF":1.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889777","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}
引用次数: 0
Evaluation of Petrophysical Properties of Mishrif, Rumiala, Ahmadi, and Mauddud Formations in Nasiriya Oil Field—Middle of Iraq 伊拉克中部纳西里耶油田 Mishrif、Rumiala、Ahmadi 和 Mauddud 地层的岩石物理特性评估
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-10-29 DOI: 10.1134/S0965544124050062
Hiba Tarq Jaleel, Ahmed S. Al-Banna
{"title":"Evaluation of Petrophysical Properties of Mishrif, Rumiala, Ahmadi, and Mauddud Formations in Nasiriya Oil Field—Middle of Iraq","authors":"Hiba Tarq Jaleel,&nbsp;Ahmed S. Al-Banna","doi":"10.1134/S0965544124050062","DOIUrl":"10.1134/S0965544124050062","url":null,"abstract":"<p>Petrophysical parameters were assessed using comprehensive log data coming from two wells (Ns-2, Ns-4) located within the Mishrif, Rumaila, Ahmadi, and Mauddud formations within the Nasiriya oil field, Iraq. The logs were digitized using Techlog 2015 software, and environmental modifications were implemented to guarantee precise interpretations. The shale volume used to be determined using gamma ray (GR) logs, subsequently leading towards the calculation of the effectiveness porosity. Water saturation is used to be calculated alongside Archie's equation. The investigation indicated that the lithology regarding the Mishrif, Rumaila, Ahmadi, and Mauddud formations happens to be predominantly limestone, alongside calcite like the principal mineral within the matrix. All formations were found to contain water like the fluid type, except within favor regarding the Mishrif formation at the 2013–2046 m within Ns-2, and 2000–2060 m within Ns-4, where hydrocarbons were identified. The top strata for these depths comprise substantial shale alongside limited effective porosity, serving like cap rock at the depths from 2013 to 2016 m within Ns-2, and 2000 towards 2006 m within Ns-4.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 7","pages":"762 - 770"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540714","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}
引用次数: 0
Estimating the Petrophysical Properties Cutoff Values for Net Pay Determination: A Case Study of Khasib Formation, Southern Iraq 估算用于确定净付油层的岩石物理特性临界值:伊拉克南部 Khasib 地层案例研究
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-10-29 DOI: 10.1134/S0965544124050037
Alyaa M. Ali, Jassim M. Al-Said Naji, Mohammed A. Ahmed
{"title":"Estimating the Petrophysical Properties Cutoff Values for Net Pay Determination: A Case Study of Khasib Formation, Southern Iraq","authors":"Alyaa M. Ali,&nbsp;Jassim M. Al-Said Naji,&nbsp;Mohammed A. Ahmed","doi":"10.1134/S0965544124050037","DOIUrl":"10.1134/S0965544124050037","url":null,"abstract":"<p>In order to calculate pay thickness and net/gross ratio, a set of limiting values (called cutoffs) for petrophysical parameters like permeability, shale volume, porosity, and water saturation should be defined. This paper thoroughly explains the most useful and applicable methods for calculating the cutoff values, outlining their advantages, disadvantages, and required input data. These techniques include the traditional Best fit line, Quadrant, Worthington, and Cumulative hydrocarbon methods. Khasib formation in Amara oil field is taken as a study object; the cutoff values are estimated according to the proposed methods. Considering the accuracy, the data available, and the limitations of each method. Khasib formation is divided into four units the reservoir units identified as KH2 and KH4, The cutoffs for the petrophysical properties were calculated for each reservoir unit. It was determined that the suitable cut-off value for permeability changes from one unit to another because of the different rock types that characterize each unit. The permeability cut-off for the KH2 unit is 0.01 and the estimated porosity cutoff value is 0.09. In contrast, for the KH4 unit, the permeability cut-off is taken as 0.1 and the porosity cutoff is estimated as 0.1. Furthermore, the calculated cutoffs of the shale volume and the water saturation are similar for the two reservoir units (KH2 and KH4) and equal to 10 and 60% respectively. Finally, the determined cutoffs can be applied and the net pay thickness and ratio of net/gross can be calculated for each unit in the objective formation.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 7","pages":"820 - 828"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540705","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}
引用次数: 0
Investigations on Unconventional Tight Carbonate Rock Cores by Low-Field Nuclear Magnetic Resonance Relaxometry
IF 1.3 4区 工程技术
Petroleum Chemistry Pub Date : 2024-10-25 DOI: 10.1134/S0965544124060124
Salim Ok, Waleed Al-Bazzaz, Dawoud Bahzad
{"title":"Investigations on Unconventional Tight Carbonate Rock Cores by Low-Field Nuclear Magnetic Resonance Relaxometry","authors":"Salim Ok,&nbsp;Waleed Al-Bazzaz,&nbsp;Dawoud Bahzad","doi":"10.1134/S0965544124060124","DOIUrl":"10.1134/S0965544124060124","url":null,"abstract":"<p>Low-field nuclear magnetic resonance (LF-NMR) is a user-friendly tool for analyzing rock core samples. NMR relaxation measurements on these samples provide a possibility to quantify the presence of different fluids (water vs. crude oil). In this study, we determined the permeability and porosity-type properties of rock cores from Kuwait by analyzing the longitudinal (<i>T</i><sub>1</sub>) and transverse (<i>T</i><sub>2</sub>) NMR relaxation data. The intricate structure of carbonate is reflected in the NMR analysis as fluctuating <i>T</i><sub>1</sub> and <i>T</i><sub>2</sub> values depending on the depth of rock cores. <i>T</i><sub>1</sub> results showed a lower percentage of clay-bound water, while <i>T</i><sub>2</sub> results suggested a higher fraction. This discrepancy between <i>T</i><sub>1</sub> and <i>T</i><sub>2</sub> values is attributed to the differences in a surface relaxivity. Additionally, the <i>T</i><sub>1</sub>/<i>T</i><sub>2</sub> ratio, a crucial parameter for the mineral affinity of the fluid, is lower for the signal associated with clay-bound water and higher for those associated with hydrocarbons. The oil/water contact depth was measured at 17776 feet. The <i>m</i> (cementation factor) and <i>n</i> (saturation exponent) values were determined for each rock core individually, enabling the validation of permeability. This study’s most important and novel finding is the detection of the highest permeability (as indicated by the analysis of the <i>T</i><sub>1</sub> and <i>T</i><sub>2</sub> relaxation curves) alongside the highest <i>m</i> and <i>n</i> values at approximately the same depth as the water/oil contact.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 1","pages":"57 - 71"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655378","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}
引用次数: 0
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