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Iso-propyl caprylate and iso-propyl linolenate synthetic fluids as novel alternatives in deep-water drilling operations: Critical fluid properties and aerobic biodegradability assessments 辛酸异丙酯和亚麻酸异丙酯合成液作为深水钻井作业中的新型替代品:关键流体特性和好氧生物降解性评估
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2023.06.007
Adewale Johnson Folayan , Adewale Dosunmu , Aleruchi Boniface Oriji
{"title":"Iso-propyl caprylate and iso-propyl linolenate synthetic fluids as novel alternatives in deep-water drilling operations: Critical fluid properties and aerobic biodegradability assessments","authors":"Adewale Johnson Folayan ,&nbsp;Adewale Dosunmu ,&nbsp;Aleruchi Boniface Oriji","doi":"10.1016/j.petlm.2023.06.007","DOIUrl":"10.1016/j.petlm.2023.06.007","url":null,"abstract":"<div><p>Present drilling fluids for deep water wells have severe degenerative effect on the environment with high operational and disposal costs. Thus, making them less desirable in recent times. Ester synthetic drilling fluid provides a novel environmentally friendly alternative but conventional ester-based drilling fluids exhibit high viscosities in deep-water wells causing excessive equivalent circulating density (ECD) and increased risk of lost circulation owing to narrow mud density window. This study experimentally investigates the critical fluid properties and aerobic biodegradability potentials of two newly developed deep-water synthetic ester drilling fluids namely: iso-propyl caprylate (COIPE) and iso-propyl linolenate (LOIPE) synthetic fluids and their comparison with synthetic-paraffin (SP-SBF) and isomerized-olefin (IO-SBF) synthetic hydrocarbon fluids. The esters of iso-propyl caprylate and iso-propyl linolenate were produced from the isolation of ester mixtures that were obtained from the homogeneous catalytic transesterification of coconut and linseed plant oil biomass respectively. The COIPE was isolated from the coconut oil iso-propyl ester mixture by low-pressure fractional distillation technique. While fractional distillation and crystallization were used to isolate the LOIPE ester from the linseed oil iso-propyl ester mixture. Meanwhile, the aerobic biodegradation investigation was conducted by a modified oxygen consumption respirometry technique. The GC-MS analysis of the COIPE and LOIPE showed that the former contains essentially of lower saturated carbon compounds (C8). Whereas the latter contains higher molecular weight and unsaturated carbon compounds (C18<sup>+</sup>). The COIPE and LOIPE kinematic viscosity values are in good agreement with that of the reference synthetic hydrocarbon fluid samples (SP-SBF and IO-SBF). Although, the COIPE synthetic ester has lower viscosity value owing to the presence of shorter chain and saturated carbon atoms (C8 esters). Similarly, the linolenic oil iso-propyl ester has excellent cold flow characteristics for deep-water well drilling owing to lower values of cloud and pour points as a result of higher concentration of poly-unsaturated linolenic esters. The iso-propyl caprylate and the iso-propyl linolenate ester synthetic fluids are readily biodegradable in the sea water inoculum under aerobic condition. However, the iso-propyl caprylate is inherently biodegradable because its degradation level and that of the reference chemical sample were already above 60% during the 10-day window period. The SP-SBF and the IO-SBF synthetic fluids have lower aerobic biodegradation values because they contain little quantity of poly aromatic hydrocarbons as evident in their GC-MS profiles. Finally, esters and unsaturated synthetic-based fluid are more rapidly biodegradable than paraffinic synthetic fluids and the rate of biodegradation of organic compounds decreases as molecular weight increases</p>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000421/pdfft?md5=d99ffd8fa8d4e5a057bc22835db9c4d5&pid=1-s2.0-S2405656123000421-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76720982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Volumetric and viscometric properties of aqueous 1,2-dimethylethylenediamine solution for carbon capture application 用于碳捕获的 1,2-二甲基乙二胺水溶液的体积和粘度特性
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2023.06.005
Hossein Haghani , Teerawat Sema , Pipat Na Ranong , Thanthip Kiattinirachara , Benjapon Chalermsinsuwan , Hongxia Gao , Zhiwu Liang , Paitoon Tontiwachwuthikul
{"title":"Volumetric and viscometric properties of aqueous 1,2-dimethylethylenediamine solution for carbon capture application","authors":"Hossein Haghani ,&nbsp;Teerawat Sema ,&nbsp;Pipat Na Ranong ,&nbsp;Thanthip Kiattinirachara ,&nbsp;Benjapon Chalermsinsuwan ,&nbsp;Hongxia Gao ,&nbsp;Zhiwu Liang ,&nbsp;Paitoon Tontiwachwuthikul","doi":"10.1016/j.petlm.2023.06.005","DOIUrl":"10.1016/j.petlm.2023.06.005","url":null,"abstract":"<div><p>The present work investigates the volumetric and viscometric properties of an aqueous solution of 1,2-dimethylethylenediamine (DEEDA) over an entire concentration range and an absorber operating temperature range of 313.15K–333.15K at atmospheric pressure. The investigated volumetric properties included the density, excess molar volume, partial molar volume, and the investigated viscometric properties included the viscosity, viscosity deviation, free energy for activation of viscous flow, excess free energy for activation of viscous flow, and excess entropy for activation of viscous flow. The results indicated that there are strong intermolecular interactions and suitable molecular packing in the binary DEEDA–water mixture. Hence, the mixture was found to deviate from a real mixture according to the calculated excess properties. The DEEDA solvent's preliminary volumetric and viscometric properties revealed convincing potential as a novel amine for carbon capture. Additionally, the Redlich-Kister-based correlations showed favorable correlative performance for excess molar volume, viscosity deviation, and excess entropy for activation of viscous flow.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000408/pdfft?md5=effa2e69c41a7bf15e2517cc4288b442&pid=1-s2.0-S2405656123000408-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75100077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Progress in the application of graphene material in oilfield chemistry: A review 石墨烯材料在油田化学中的应用进展:综述
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2023.12.002
Jinsheng Sun , Yuanwei Sun , Yong Lai , Li Li , Gang Yang , Kaihe Lv , Taifeng Zhang , Xianfa Zhang , Zonglun Wang , Zhe Xu , Zhiwen Dai , Jingping Liu
{"title":"Progress in the application of graphene material in oilfield chemistry: A review","authors":"Jinsheng Sun ,&nbsp;Yuanwei Sun ,&nbsp;Yong Lai ,&nbsp;Li Li ,&nbsp;Gang Yang ,&nbsp;Kaihe Lv ,&nbsp;Taifeng Zhang ,&nbsp;Xianfa Zhang ,&nbsp;Zonglun Wang ,&nbsp;Zhe Xu ,&nbsp;Zhiwen Dai ,&nbsp;Jingping Liu","doi":"10.1016/j.petlm.2023.12.002","DOIUrl":"10.1016/j.petlm.2023.12.002","url":null,"abstract":"<div><p>Graphene is a single atom thick crystal composed of carbon atoms. It is the lightest, thinnest, strongest material that conducts heat and electricity well heretofore. In terms of application, by introducing oxygen-containing groups, graphene can be well dispersed in solvents, can be chemically modified and functionalized, or connected with other electroactive substances through covalent bond or non-covalent bond to form composite materials, which is conducive to further processing and promotion. The application of graphene in oilfield chemistry started late, but developed rapidly. Graphene has played an active role in drilling fluid, cementing fluid, fracturing fluid, displacement fluid and other oilfield working fluids. It can enhance the temperature and salt resistance of working fluid and improve the effect of working fluid. In this paper, several directions of graphene applications in oilfield chemistry, such as modified graphene, graphene copolymers and graphene nanoparticles, are reviewed in detail from the synthesis methods, action mechanisms and effects of graphene and its derivatives, and the frontier cases at this stage are given. On the basis of the existing research, suggestions for the development direction of graphene materials in oilfield chemistry are given for a variety of graphene materials, aiming to provide guidance for the application of graphene in oilfield chemistry.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000779/pdfft?md5=420b0cd9b426ea1833780724880eed5a&pid=1-s2.0-S2405656123000779-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139014832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Production performance analysis of a continental shale oil reservoir in Bohai Bay basin 渤海湾盆地大陆性页岩油藏生产性能分析
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2023.11.002
Quansheng Guan , Changwei Chen , Xiugang Pu , Yonggang Wan , Jing Xu , Haiwei Zeng , Chen Jia , Huanhuan Gao , Wei Yang , Zesen Peng
{"title":"Production performance analysis of a continental shale oil reservoir in Bohai Bay basin","authors":"Quansheng Guan ,&nbsp;Changwei Chen ,&nbsp;Xiugang Pu ,&nbsp;Yonggang Wan ,&nbsp;Jing Xu ,&nbsp;Haiwei Zeng ,&nbsp;Chen Jia ,&nbsp;Huanhuan Gao ,&nbsp;Wei Yang ,&nbsp;Zesen Peng","doi":"10.1016/j.petlm.2023.11.002","DOIUrl":"10.1016/j.petlm.2023.11.002","url":null,"abstract":"<div><p>Due to the extremely low permeability of shale formations, the combination of horizontal well and volume fracturing has been proposed as an effective technique to improve the production of Dagang continental shale oil reservoirs. Based on the flow material balance method (FMB) and straight-line analysis (SLA) method, the stimulated reservoir volume (SRV) and drainage volume are determined to identify the flow regimes of the seepage mechanism of shale oil reservoirs. To resolve the challenges of multi-scaled flow regimes and bottom hole pressure (BHP) variation before and after pumping in shale oil wells, a multi-linear analytical flow model was established to predict the future production and the final expected ultimate recoverable oil (EUR<sub>o</sub>) after fitting the historical production dynamics. Based on the results, it can be concluded that the flow regime of a shale oil well in production can be divided into two stages consisting of linear flow within SRV and composite flow from the un-stimulated area to SRV. The effects of fracturing operation parameters, such as fracturing fluid volume and sand/liquid ratio, on shale oil productivity, are analyzed, and insightful suggestions are drawn for the future development of this pay zone.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000731/pdfft?md5=596b80a7979ec82d280380e5a1c6156e&pid=1-s2.0-S2405656123000731-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139291291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of alumina and silica nanocomposite based on polyacrylamide on light and heavy oil recovery in presence of formation water using micromodel 基于聚丙烯酰胺的氧化铝和二氧化硅纳米复合材料对地层水存在下轻油和重油采收率的影响(使用微模型
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2023.03.001
Ashkan Maleki , Behnam Sedaee , Alireza Bahramian , Sajjad Gharechelou , Nahid Sarlak , Arash Mehdizad , Mohammad reza Rasaei , Aliakbar Dehghan
{"title":"Effect of alumina and silica nanocomposite based on polyacrylamide on light and heavy oil recovery in presence of formation water using micromodel","authors":"Ashkan Maleki ,&nbsp;Behnam Sedaee ,&nbsp;Alireza Bahramian ,&nbsp;Sajjad Gharechelou ,&nbsp;Nahid Sarlak ,&nbsp;Arash Mehdizad ,&nbsp;Mohammad reza Rasaei ,&nbsp;Aliakbar Dehghan","doi":"10.1016/j.petlm.2023.03.001","DOIUrl":"10.1016/j.petlm.2023.03.001","url":null,"abstract":"<div><p>Increasing world request for energy has made oil extraction from reservoirs more desirable. Many novel EOR methods have been proposed and utilized for this purpose. Using nanocomposites in chemical flooding is one of these novel methods. In this study, we investigated the impact of six injection solutions on the recovery of light and heavy oil with the presence of two different brines as formation water using a homogenous glass micromodel. All of the injection solutions were based on a 40,000 ppm NaCl synthetic seawater (SSW), one of which was additive free and the others were prepared by dispersing nanocomposite silica-based polyacrylamide (NCSP), nanocomposite alumina-based polyacrylamide (NCAP), the combination of both nanocomposites silica and alumina based on polyacrylamide (NCSAP), surfactant (CTAB) and polyacrylamide (PAM) with a concentration of 1000 ppm as additives. The Stability of nanocomposites was tested against the salinity of the brine and temperature using salinity and DSC tests which were successful. Alongside stability tests, IFT, contact angle and oil recovery measurements were made. Visual results revealed that in addition to the effect of silica and alumina nanocomposite in reducing interfacial tension and wettability alteration, control of mobility ratio caused a major improvement in sweeping efficiency and oil recovery. According to the sweeping behavior of injected fluids, it was found that the main effect of surfactant was wettability alteration, for polyacrylamide was mobility control and for nanocomposites was the reduction of interfacial tension between oil and injected fluid, which was completely analyzed and checked out. Also, NCSAP with 95.83% and 70.33% and CTAB with 84.35% and 91% have the highest light oil recoveries at 250,000 ppm and 180,000 ppm salinity, respectively which is related to the superposition effect of interactions between nanocomposites, solution and oil. Based on our results it can be concluded that the most effective mechanism in oil recovery was IFT reduction which was done by CTAB reduction also by using a polymer-based nanocomposite such as NCSAP and adding the mobility control factor, the oil recovery can be further enhanced. In the case of heavy oil recovery, it can be concluded that the mobility control played a much more effective role when the PAM performed almost similarly to the CTAB and other nanocomposites with a recovery factor of around 17%. In this study, we tried to investigate the effect of different injection solutions and their related mechanisms on oil recovery.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000160/pdfft?md5=52d08a6534126a88ee0da4e4564101a8&pid=1-s2.0-S2405656123000160-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74475501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nanoparticle-Stabilized CO2 Foam Flooding for Enhanced Heavy Oil Recovery: A Micro-Optical Analysis 纳米颗粒稳定的二氧化碳泡沫用于重油强化采收:微光学分析
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2024.06.002
Arifur Rahman, E. Shirif, Farshid Torabi
{"title":"Nanoparticle-Stabilized CO2 Foam Flooding for Enhanced Heavy Oil Recovery: A Micro-Optical Analysis","authors":"Arifur Rahman, E. Shirif, Farshid Torabi","doi":"10.1016/j.petlm.2024.06.002","DOIUrl":"https://doi.org/10.1016/j.petlm.2024.06.002","url":null,"abstract":"","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141405929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental investigation of viscous oil–water–sand flow in horizontal pipes: Flow patterns and pressure gradient 水平管道中粘性油-水-砂流动的实验研究:流动模式和压力梯度
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2023.09.005
Tarek Ganat
{"title":"Experimental investigation of viscous oil–water–sand flow in horizontal pipes: Flow patterns and pressure gradient","authors":"Tarek Ganat","doi":"10.1016/j.petlm.2023.09.005","DOIUrl":"10.1016/j.petlm.2023.09.005","url":null,"abstract":"<div><p>Fluid production from unconsolidated reservoirs often leads in sand production, which poses a number of issues. Sand deposition in flowlines can result in significant pressure dips, pipe and facility damage, and obstructions that decrease productivity. More research is needed to understand the movement and deposition of sand in oil–water–sand (O–W–S) fluxes. This article focuses on O–W–S flows in a 6-meter-long horizontal pipe with an inner diameter of 0.0381 m. The study looks at the flow behavior of high viscosity oil–water (O–W), water–sand (W–S), and oil–water–sand (O–W–S) flows. Experiments were carried out at 250 psig pressure in a laboratory flow test facility using various heavy synthetic oils (viscosities ranging from 3500 cP to 7500 cP at 25°C) and tap water. The sand concentration varied from 1% to 10%, with an average sand particle diameter of 145 μm and material density of 2630 kg/m<sup>3</sup>. Water cuts ranged from 0.0 to 1.0. The experimental results revealed a minor change in pressure gradient between (O–W) and (O–W–S) flows. However, increasing the sand concentration in (O–W–S) flow resulted in higher pressure losses. The reduction factor of pressure gradient indicated that the highest decrease in pressure drop occurred at higher superficial oil velocities. Furthermore, a direct relationship was observed between the reduction factor and the decrease in water cut. The results also showed that the minimum required transportation velocity for sand slurry decreased with increasing superficial oil velocity, while the minimum transportation condition increased with higher sand concentration. The comparison between the expected pressure gradient from Bannwart and McKibben et al. and the actual experimental data demonstrated significant accuracy for the oil viscosities and superficial oil velocities used in the study.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000639/pdfft?md5=03f697400191bab413d488c867e4e0ac&pid=1-s2.0-S2405656123000639-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134994675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of SARA Composition of Crudes Purely from Density and Viscosity using Machine Learning Based Models 利用基于机器学习的模型纯粹从密度和粘度估算原油的 SARA 成分
Petroleum Pub Date : 2024-06-01 DOI: 10.1016/j.petlm.2024.06.001
A. D. Kulkarni, Pratiksha D. Khurpade, Somnath Nandi
{"title":"Estimation of SARA Composition of Crudes Purely from Density and Viscosity using Machine Learning Based Models","authors":"A. D. Kulkarni, Pratiksha D. Khurpade, Somnath Nandi","doi":"10.1016/j.petlm.2024.06.001","DOIUrl":"https://doi.org/10.1016/j.petlm.2024.06.001","url":null,"abstract":"","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141414131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mottled dolomite in the lower Cambrian Longwangmiao formation in the Northern Sichuan Basin, South China 华南北部四川盆地下寒武统龙王庙地层中的斑状白云岩
Petroleum Pub Date : 2024-03-01 DOI: 10.1016/j.petlm.2022.01.005
Xuefei Yang , Hao Tang , Junyi Zhang , Yao Du , Ruifeng Tang , Shuang Pan , Xiang Zhou , Yan Xu
{"title":"Mottled dolomite in the lower Cambrian Longwangmiao formation in the Northern Sichuan Basin, South China","authors":"Xuefei Yang ,&nbsp;Hao Tang ,&nbsp;Junyi Zhang ,&nbsp;Yao Du ,&nbsp;Ruifeng Tang ,&nbsp;Shuang Pan ,&nbsp;Xiang Zhou ,&nbsp;Yan Xu","doi":"10.1016/j.petlm.2022.01.005","DOIUrl":"https://doi.org/10.1016/j.petlm.2022.01.005","url":null,"abstract":"<div><p>At the end of Early Cambrian time, the Sichuan basin (South China) was located in a wide carbonate platform, with hundreds of meters of carbonate deposited. The Longwangmiao Formation carbonate in Sichuan basin is partially to completely dolomitized, displaying a mottled texture in the northern area of the exposure. The mottled dolomitic limestone developed parallel to bedding, with shape irregular boundaries with limestone that has not been dolomitized. The mottled dolomite is composed of powder crystalline and finely crystalline dolomite, while the matrix limestone is composed of micritic calcite. the isotopic composition of mottled dolomite (δ<sup>13</sup>C = +0.29‰PDB, δ<sup>18</sup>O = −1.15‰PDB) is similar to that of micrite calcite (δ<sup>13</sup>C = −0.49‰PDB, δ<sup>18</sup>O = −1.45‰PDB). Both isotopic values and trace element data indicate that the dolomitized fluid is originated from sea water. Some beds contain gypsum pseudomorphs and mud cracks, indicating a shallow and evaporative environment with local high salinity during deposition. Dolomitization likely took place early, in part as a result of sea water salinity concentration. Trace fossils thalassinoides horizontalis, thalassinoides callianassa and planolites developed in the Longwangmiao Formation, and the sharp edges of mottled dolomite are similar to these trace fossils. The beds are intensely bioturbated. In the burrow network, the sediments and burrow fill were coarse and loose with little clay, and it is interpreted here as being easier to be dolomitized than the surrounding sediments. Partial dolomitization is thus interpreted to have occurred in the burrow system, and the degree of dolomitization was related to the degree of bioturbation, which is controlled by the trace-making creatures.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656122000116/pdfft?md5=49ba16cbc98089d5567529eeff82577d&pid=1-s2.0-S2405656122000116-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intelligent solubility estimation of gaseous hydrocarbons in ionic liquids 离子液体中气态碳氢化合物的智能溶解度估算
Petroleum Pub Date : 2024-03-01 DOI: 10.1016/j.petlm.2023.09.002
Behnaz Basirat , Fariborz Shaahmadi , Seyed Sorosh Mirfasihi , Abolfazl Jomekian , Bahamin Bazooyar
{"title":"Intelligent solubility estimation of gaseous hydrocarbons in ionic liquids","authors":"Behnaz Basirat ,&nbsp;Fariborz Shaahmadi ,&nbsp;Seyed Sorosh Mirfasihi ,&nbsp;Abolfazl Jomekian ,&nbsp;Bahamin Bazooyar","doi":"10.1016/j.petlm.2023.09.002","DOIUrl":"10.1016/j.petlm.2023.09.002","url":null,"abstract":"<div><p>The research focuses on evaluating how well new solvents attract light hydrocarbons, such as propane, methane, and ethane, in natural gas sweetening units. It is important to accurately determine the solubility of hydrocarbons in these solvents to effectively manage the sweetening process. To address this challenge, the study proposes using advanced empirical models based on artificial intelligence techniques like Multi-Layer Artificial Neural Network (ML-ANN), Support Vector Machines (SVM), and Least Square Support Vector Machine (LSSVM). The parameters for the SVM and LSSVM models are estimated using optimization methods like Genetic Algorithm (GA), Particle Swarm Optimization (PSO), and Shuffled Complex Evolution (SCE). Data on the solubility of propane, methane, and ethane in various ionic liquids are collected from reliable literature sources to create a comprehensive database. The proposed artificial intelligence models show great accuracy in predicting hydrocarbon solubility in ionic liquids. Among these, the hybrid SVM models perform exceptionally well, with the PSO-SVM hybrid model being particularly efficient computationally. To ensure a comprehensive analysis, different examples of hydrocarbons and their order are included. Additionally, a comparative analysis is conducted to compare the AI models with the thermodynamic COSMO-RS model for solubility analysis. The results demonstrate the superiority of the AI models, as they outperform traditional thermodynamic models across a wide range of data. In conclusion, this study introduces advanced artificial intelligence algorithms such as ML-ANN, SVM, and LSSVM in accurately estimating the solubility of hydrocarbons in ionic liquids. The incorporation of optimization techniques and variations in hydrocarbon examples improves the accuracy, precision, and reliability of these intelligent models. These findings highlight the significant potential of AI-based approaches in solubility analysis and emphasize their superiority over traditional thermodynamic models.</p></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405656123000548/pdfft?md5=664c48093d6d4fe643139268259683f4&pid=1-s2.0-S2405656123000548-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135298646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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