Changes

Analyzing sequences for stratigraphic or combination traps is simply looking for stratigraphic changes, such as updip pinch-outs of rocks with reservoir potential or mounds of reservoir-quality rocks, in the context of a depositional sequence. Knowing where the target interval and area are within a depositional sequence gives us the ability to predict the presence of certain trap types. Follow the procedure outlined below to predict the location of traps within a sequence.

Analyzing sequences for stratigraphic or combination traps is simply looking for stratigraphic changes, such as updip pinch-outs of rocks with reservoir potential or mounds of reservoir-quality rocks, in the context of a depositional sequence. Knowing where the target interval and area are within a depositional sequence gives us the ability to predict the presence of certain trap types. Follow the procedure outlined below to predict the location of traps within a sequence.

# Using seismic lines and/or log [[cross section]]s, determine the systems tract type for intervals of interest, i.e., lowstand, transgressive, or highstand.

# Identify potential seal- and reservoir-quality rocks using seismic facies and lithofacies shown on maps and cross sections.

# In areas with juxtaposed reservoir- and seal-quality rocks, look for trapping geometries.

| Using seismic lines and/or log [[cross section]]s, determine the systems tract type for intervals of interest, i.e., lowstand, transgressive, or highstand.

| Identify potential seal- and reservoir-quality rocks using seismic facies and lithofacies shown on maps and cross sections.

| In areas with juxtaposed reservoir- and seal-quality rocks, look for trapping geometries.

==Transgressive and highstand systems tracts==

==Transgressive and highstand systems tracts==