Changes

===Step 3. Lithology-log response analysis===

===Step 3. Lithology-log response analysis===

If continuous core is available, analysis can proceed directly to the preparation and correlation of vertical component profiles (steps 4 and 5). However, in many reservoirs, particularly those with thick gross pay intervals, core or sidewall core coverage is limited to only a few wells or intervals. To complete the lithological analysis, the geologist must resort to cuttings descriptions or log analysis (see “Quick-Look Lithology from Logs”). Commonly, the degree of detail that can be extracted from cuttings samples is not adequate for the objectives of the study, so the geologist must attempt to correlate log response with lithological data from intervals containing full diameter or sidewall cores and then apply these correlations to uncored intervals.

If continuous core is available, analysis can proceed directly to the preparation and correlation of vertical component profiles (steps 4 and 5). However, in many reservoirs, particularly those with thick gross pay intervals, core or sidewall core coverage is limited to only a few wells or intervals. To complete the lithological analysis, the geologist must resort to cuttings descriptions or log analysis (see [[Quick-look lithology from logs]]). Commonly, the degree of detail that can be extracted from cuttings samples is not adequate for the objectives of the study, so the geologist must attempt to correlate log response with lithological data from intervals containing full diameter or sidewall cores and then apply these correlations to uncored intervals.

===Step 4. Diagenetic profile construction===

===Step 4. Diagenetic profile construction===