Porosity estimation method in carbonate rock
US5869755A · kind A · utility
30Cited by
4References
10Claims
0Family size
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Key dates
| Filing date | Dec 31, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/6242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acoustical method of determining the spherical, or vuggy, porosity in carbonate rock formations, as a function of shear modulus. Total porosity and shear modulus of the formation is measured. Then the intrinsic granular porosity, dry bulk modulus, and spherical porosity are calculated. The carbonate rock is modeled, consisting of a primary host medium composed of carbonate grains with intergranular porosity between them. The model is easily modified to account for the case of intercrystalline microporosity existing within the grains, in addition to the intergranular porosity between them.
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