| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcb88e6c103e4974b104452c51fbb4a5 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S507-937
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S507-936 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-584 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-584
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-22 |
| filingDate |
1987-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1989-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f94670f64851c6aee342b3cd88c28ef7 |
| publicationDate |
1989-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4825951-A |
| titleOfInvention |
Process for recovery of oil from a subsurface reservoir by surfactant flooding |
| abstract |
Oil is recovered from a subsurface reservoir by surfactants. Surfactant flooding is accomplished especially in reservoirs with marked temperature fluctuations or a temperature gradient which are normally problematic since a soluble surfactant efffective for oil mobilization does not retain these properties over wide temperature ranges of, e.g., 10 DEG to 100 DEG C. The new process provides a good surfactant effectiveness even at such extreme temporary and/or local temperature fluctuations. A mixture of a carboxymethylated oxethylate and a polyglucosyl sorbitol fatty acid ester is used. The polyglucosyl sorbitols used as fatty acid esters are those with 2 to 20 glucose units. Recovery of oil by such surfactant flooding is useful above all in reservoirs with temporary or local temperature changes. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007079964-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004177958-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7262153-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7055602-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008113881-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006189486-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4917808-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7137447-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006185845-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6776234-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7229950-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7312184-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006027363-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7612022-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6260621-B1 |
| priorityDate |
1986-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |