Abstract
Porosity was obtained from matrix- and intraparticle porosity
assessed from image analysis of backscattered electron micrographs
of 3000x and 300x magnification. Comparing porosity assessed from
image analysis with porosity measured by index properties, it was
seen that image analysis data at 3000x magnification overestimates
the dominating phase where images are resolved well, because of
transparency in the upper few microns of the sample. Thus image
analysis porosity in the upper ooze interval (porosities more than
65%) show a good correspondence, because of the combined effect of
porosity being the domination phase and insufficient resolution
leading to porosity underestimation. In chalk samples (porosities
around 50% or more) the lowest estimate of image analysis porosity
corresponded because of the transparency, whereas in limestone
samples (porosities less than 25%) highest image porosity estimate
corresponded also because of the transparency.
| Original language | English |
|---|---|
| Title of host publication | Nordic Petroleum Technology III Research in Petroleum Technology |
| Place of Publication | Ås |
| Publisher | Nordic Energiforskningsprogram |
| Publication date | 1997 |
| Pages | 1071-1078 |
| Publication status | Published - 1997 |