{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361699996211318784.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2118/24987-pa"}},{"identifier":{"@type":"URI","@value":"https://onepetro.org/PO/article-pdf/10/01/55/2602774/spe-24987-pa.pdf"}}],"dc:title":[{"@value":"Screening of Crude Oils for Asphalt Precipitation: Theory, Practice, and the Selection of Inhibitors"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Summary</jats:title>\n               <jats:p>This paper describes a simple method to screen crude oils for their tendency to precipitate asphalt, which may cause problems during production. The method is based on a thermodynamic model of asphalt solubility, derived earlier by Flory and Huggins. The most important parameters in this model are the Hildebrand solubility parameters for oil and asphaltene, and their molar volumes. The oil parameters can all be correlated with the in-situ density of the crude.</jats:p>\n               <jats:p>The relative change in asphalt solubility in the crude per unit pressure drop is shown to be highest for light crudes that are undersatu-rated with gas, which usually contain only a small amount of asphaltenes. Hence, the chance that asphalt will precipitate will be greatest for these light crudes. For pressures below the bubblepoint, depres-surising of the crude will cause a rapid increase in asphalt solubility, due to changes in liquid composition.</jats:p>\n               <jats:p>It is shown that heavy crudes usually will give fewer problems with asphalt precipitation, despite their higher asphaltene content, certainly if the reservoir pressure is close to bubblepoint pressure.</jats:p>\n               <jats:p>Consequently, the tendency for asphalt precipitation is mainly determined by three parameters: the extent to which the crude is under-saturated with gas, the density of the crude at reservoir conditions, and its saturation with asphalt at downhole conditions.</jats:p>\n               <jats:p>Apart from the simple screening method, more elaborate methods are described to assess the potential for asphalt precipitation more accurately; asphaltene analysis on produced reservoir fluid and tank oil; n-heptane titration of the tank oil; visual inspection of a bottom-hole sample in a high-pressure cell during pressure reduction; and dynamic flow tests on tank oil after η-heptane addition.</jats:p>\n               <jats:p>An ultrasonic back scattering technique is described for monitoring the influence of different asphalt precipitation inhibitors. Using above techniques asphalt precipitation inhibitors have been identified that can be applied in the field.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699996211318786","@type":"Researcher","foaf:name":[{"@value":"R. B. de Boer"}],"jpcoar:affiliationName":[{"@value":"Koninklijke/Shell E&P Laboratorium"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996211318785","@type":"Researcher","foaf:name":[{"@value":"Klaas Leerlooyer"}],"jpcoar:affiliationName":[{"@value":"Koninklijke/Shell E&P Laboratorium"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996211318784","@type":"Researcher","foaf:name":[{"@value":"M. R. P. Eigner"}],"jpcoar:affiliationName":[{"@value":"Shell Intl. Petroleum Mij. B.V."}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996211318787","@type":"Researcher","foaf:name":[{"@value":"A. R. D. van Bergen"}],"jpcoar:affiliationName":[{"@value":"Koninklijke/Shell E&P Laboratorium"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"1064668X"}],"prism:publicationName":[{"@value":"SPE Production & Facilities"}],"dc:publisher":[{"@value":"Society of Petroleum Engineers (SPE)"}],"prism:publicationDate":"1995-02-01","prism:volume":"10","prism:number":"01","prism:startingPage":"55","prism:endingPage":"61"},"reviewed":"false","url":[{"@id":"https://onepetro.org/PO/article-pdf/10/01/55/2602774/spe-24987-pa.pdf"}],"createdAt":"2007-12-07","modifiedAt":"2022-02-08","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360302865555689984","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Evaluation of Asphaltene Hildebrand and Hansen Solubility Parameters Using Digital Oil Models with Molecular Dynamics Simulation"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204063835392","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"南桑山油田 アスファルテン析出の生産障害とその対策"},{"@language":"en","@value":"Development of the Minami Kuwayama Oil Field: Battle against Asphaltene"},{"@value":"講演 南桑山油田 アスファルテン析出の生産障害とその対策"},{"@language":"ja-Kana","@value":"コウエン ミナミクワヤマ ユデン アスファルテン セキシュツ ノ セイサン ショウガイ ト ソノ タイサク"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679039085056","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Experimental investigation of asphaltene phase behavior for live crude oil-Precipitation, re-dissolution and molecular weight characteristics-"},{"@language":"ja","@value":"油層流体を対象にしたアスファルテンの相挙動に関する実験的解析―アスファルテンの析出・再溶解現象と分子量特性について―"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679042209280","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"石油生産に伴うアスファルテンの析出とその対策に対する分子スケールからの検討"},{"@language":"en","@value":"Molecular scale study on solutions of asphaltene deposition problems in oil production"},{"@value":"講演 石油生産に伴うアスファルテンの析出とその対策に対する分子スケールからの検討"},{"@language":"ja-Kana","@value":"コウエン セキユ セイサン ニ トモナウ アスファルテン ノ セキシュツ ト ソノ タイサク ニ タイスル ブンシ スケール カラ ノ ケントウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282680166283648","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Predicting Asphaltene Precipitation by Simple Algorithm Using Solubility Parameter Calculated Based on Peng-Robinson Equation of State"},{"@language":"ja","@value":"溶解パラメーター推算にPeng-Robinson状態方程式を使用した簡易アルゴリズムによるアスファルテン析出挙動の予測"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282680167504256","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Integrated Modelling Methods for Asphaltene Deposition in Wellstring"},{"@language":"ja","@value":"坑井ストリング内に沈積するアスファルテン量を予測する統合モデルの構築"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.2118/24987-pa"},{"@type":"CROSSREF","@value":"10.1021/acs.energyfuels.3c02507_references_DOI_8xjGTekUprBYzX9NOwbdLdB2PtK"},{"@type":"CROSSREF","@value":"10.3720/japt.74.225_references_DOI_8xjGTekUprBYzX9NOwbdLdB2PtK"},{"@type":"CROSSREF","@value":"10.3720/japt.78.496_references_DOI_8xjGTekUprBYzX9NOwbdLdB2PtK"},{"@type":"CROSSREF","@value":"10.3720/japt.81.469_references_DOI_8xjGTekUprBYzX9NOwbdLdB2PtK"},{"@type":"CROSSREF","@value":"10.1627/jpi.52.322_references_DOI_8xjGTekUprBYzX9NOwbdLdB2PtK"},{"@type":"CROSSREF","@value":"10.1627/jpi.51.217_references_DOI_8xjGTekUprBYzX9NOwbdLdB2PtK"}]}