Why would they update formation tops on a well that was dry. and plugged and abandoned over 20 years ago? Is this something the Geological Survey would do routinely?
Petroleum Geology Question?
This is something I do routinely almost every day as a petroleum geologist. We are constantly re-examining old data and combining it with new information in our search for new undiscovered and possibly bypassed oil reservoirs. A significant part of the future oil reserves in the US is going to come from this type of detective work. Some major discoveries have resulted from geologists going back and re-examining old well logs.
You have to keep in mind that the information coming from a well represents only one point on a map. Combining the information from that point with well data from a recently drilled well or new 3D siesmic data might change the entire interpretation of a specific formation. I saw a great example recently where a geologist realized that an unconformity extended across a region where no one else had noticed it before, and was able to find stratigraphic traps in areas that were near existing dry holes, but the wells had missed the reservoir.
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