| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fd160b48bd4cc483cafd142249836250 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-104
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-107 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-10 |
| filingDate |
1989-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_51d003459b4066d88f94fccee9e2608b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a205557da4924f5c267005499a1315c |
| publicationDate |
1990-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0387449-A2 |
| titleOfInvention |
Pulsed neutron porosity logging |
| abstract |
A borehole logging tool employing a pulsed neutron source (13) and a pair of spaced-apart epithermal neutron detectors (14,15) is lowered into a borehole traversing a subsurface formation. The formation is irradiated with bursts of fast neutrons and the epithermal neutrons returning to the borehole as a result of such irradiation are detected by the pair of epithermal neutron detectors. These detected epithermal neutrons are both time resolved and time integrated during their epithermal die-away spectrum to provide indications of lithology independent porosity and lithology dependent porosity respectively. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2314927-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0677754-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5532482-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AU-724756-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2314927-A |
| priorityDate |
1989-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |