Thistle Field

Geochemical data interpretation included hydrocarbon concentration (how much) and hydrocarbon composition (what kind, or fingerprint).
Hydrocarbon gases over reservoirs are expected to be above background concentrations.

• Concentration areas below background were colored crosshatched gray.
• Areas not matching the main composition were colored solid gray.
• Areas within the main composition range were colored red, therefore, areas with high (above background) hydrocarbon gas concentrations and within the main composition range were colored red.
• All other areas were colored shades of gray.

A dashed line divided into four lettered segments helps distinguish the four distinct parts of the interpreted sample line.

• Segment A-B at the southeast end of the sample line contained only samples meeting background criteria.

• Segment B-C, which matched extents of the current Thistle Field, exhibited a nearly ideal geochemical data pattern with only one sample in the background range.

• Segment C-D illustrated the geological complexity of the Thistle Field area. Alternating background and significant samples probably represented isolated petroleum compartments. Segment C-D was more discontinuous than productive Segment B-C.

• Segment D-E exhibited continuous background.