http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2696379-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_137ad4f406af5b0333fbe8694f2ed4a9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-107 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-10 |
| filingDate | 2008-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c965c4de54b987c0abedda4a97b2b17f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9901c9db2d3a068a097716cf11d49fb9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_edd7784f13a31793651b268405c71e09 |
| publicationDate | 2017-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2696379-C |
| titleOfInvention | Thermal neutron porosity from neutron slowing-down length, formation thermal neutron capture cross section, and bulk density |
| abstract | A method for determining at least one formation property calculated from neutron measurements acquired with a downhole tool includes emitting neutrons from a source in the tool into the formation, detecting neutrons with at least one detector in the downhole tool, calculating a first slowing-down length (Li) based on the detected neutrons, and deriving a second slowing-down length (L2) based on the first slowing-down length (L1). Further steps include deriving a correlation function for relating slowing-down lengths from a first tool to slowing-down lengths associated with a different source, wherein the correlation function depends on formation properties such as bulk density; and applying the correlation function to the slowing-down length of the first tool to derive the slowing-down length of the second tool. A method for determining a thermal neutron formation porosity based on a slowing-down length from epithermal neutron measurements from an electronic neutron source includes converting the slowing-down length into a computed neutron slowing-down length from thermal neutron measurements from a chemical neutron source, wherein the converting uses a correlation function that depends on formation bulk density; deriving a thermal neutron countrate ratio based on the computed neutron slowing-down length, wherein the deriving uses a function that depends on the formation bulk density and formation sigma; and computing the thermal neutron formation porosity from the thermal neutron countrate ratio. |
| priorityDate | 2007-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 20.