Situ determination of hydrocarbon characteristics including oil api gravity
US4914944A · kind A · utility
8Cited by
15References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1984 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Jan 26, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods are disclosed which provide for determining in situ the characteristics of hydrocarbons including oil API gravity in a formation traversed by a borehole. The vanadium content in the formation is determined from a logging tool. The total vanadium content is then systematically separated into an oil vanadium content and a formation matrix or clay vanadium content. From the oil vanadium content and a determination of formation bulk density, porosity and oil saturation, the vanadium concentration of the oil is derived in parts per million, from which the API gravity is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.