| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_137ad4f406af5b0333fbe8694f2ed4a9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aa167897a816e0e598235c706de2c370
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2c8abd22b36e9c94090f9889ecf27cb5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0cb2dbbf8be2887e038ef696e217a1b1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_04a25ddcc405fe1eb2c9f5459a07a67b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bdf6592096aa1b3f9bcff4f94bdc46d3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bd3fd3cf268159900ea3db56cb1dc72f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b975768ff40da6f8ee8c407c70d323f2 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3504
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-359
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B47-113
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B49-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-534
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B49-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B49-088
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3577 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B47-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B49-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B49-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-35
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-53 |
| filingDate |
2000-02-15^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_816d58fc86f50f8034e256521b0da026
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_255b28ff143f9f29463d05beb7f2553e |
| publicationDate |
2000-08-31^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-0050876-A1 |
| titleOfInvention |
Analysis of downhole formation fluid contaminated by oil-based mud |
| abstract |
A method and apparatus is provided for determining a quality of downhole fluid. A series of measurements are taken of at least one parameter of borehole fluid that is indicative of oil-based mud filtrate contamination. By curve-fitting, the series of the measured parameter values are used to create an asymptotic curve indicative of the quality of the downhole fluid. One embodiment determines oil-based mud filtrate fraction in a borehole fluid sample. Another is used when there is little or no difference between the coloration of formation fluid and the coloration of OBM filtrate. Another determines gas-oil ratio of formation fluid corrected for oil-based mud filtrate contamination. Another determines the optical density of formation fluid corrected for oil-based mud filtrate contamination. Another determines conditions that would render optical density measurements invalid and sample capture premature. Another predicts the reduction of filtrate fraction for a specific extended pumping time. Another initiates sample capture when computed contamination fraction exhibits stable asymptotic convergence. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9303509-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2706191-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9057250-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1875399-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2005154-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8047286-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2005154-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8555968-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6956204-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2491443-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8899323-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2491443-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6748328-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9040901-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7251565-B2 |
| priorityDate |
1999-02-23^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |