The only “DPU” I have seen related to oil and gas leasing is the DPU that stands for “Designation of Pooled Unit”. It’s not a report, it’s a legal document filed of record into the county records where the land is located that is being pooled by it. It is the Designation of Pooled Unit that acts as the automatic extension for every lease listed in it, to carry them past their primary term and into the secondary term created by the language in the lease that says “and as long thereafter as oil or gas is produced”.
My guess is that your landman was trying to tell you that you will know that drilling of a new well is about to begin when the DPU is filed of record in Marshall County. In reality, the DPU usually isn’t filed until drilling has been completed–not before it starts, and there are several good reasons for this.
The best way to find out if drilling of a new well is about to be drilled on that pad would be to access the West Virginia drilling permit records through https://dep.wv.gov/OIL-AND-GAS/Pages/default.aspx since no well can be drilled before a drilling permit is approved and issued.