http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2321963-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_85d41fb1f3bcc2e2bb166676457b1835 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-104 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-10 |
| filingDate | 1998-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad37c30771adf92ba8e693555ddb5050 |
| publicationDate | 1998-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2321963-A |
| titleOfInvention | Earth formation oil saturation determination |
| abstract | A method for determining oil saturation in an earth formation 18 penetrated by a wellbore 22 includes taking measurements of relative amounts of carbon and oxygen by spectral analysis of neutron-induced inelastic gamma rays detected from the earth formation 18 at spaced apart locations F, N. The method includes calculating an apparent oil holdup in the wellbore 22 at each of the spaced apart locations from the relative amounts of carbon and oxygen. A corrected oil holdup is calculated in the wellbore from differences between the apparent holdups determined at each of the spaced apart locations. An apparent oil saturation in the formation is determined at each of the spaced apart locations from the relative amounts of carbon and oxygen and the corrected oil holdup. A corrected formation oil saturation is determined from differences between the apparent oil saturations at each of the spaced apart locations. In a preferred embodiment, the apparent oil holdups and apparent oil saturations are determined by comparing the measured carbon and oxygen amounts with empirical relationships of the relative amounts of carbon and oxygen with respect to known values of oil saturation for various mineral compositions and porosity values of the earth formation. Alternatively, the corrected formation oil saturation is determined by interpolating the apparent saturation value at one location between values of the hold up for which the empirical value of the saturation is determined. |
| priorityDate | 1997-02-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 20.