Dempsey 1 Commercial Flow Rate Potential, page-10

BItalian
Not sure where you got your information from for the additions to the Dempsey pre-drill cross section.
I recognize that SGC has released very little useful geological information about the well and are being very cagey or they are very confused (it doesn't help when you test a zone, rename it and then don't say which test is which pre-drill target). So the information you got may be from a good source but it has hair on it.

Note this is not a criticism - just adding my two cents. Note also, that REL is, I assume, doing a full technical due diligence on the geology, engineering and economics of a complex and potentially ground breaking well. Note also, as the saying goes if you have 2 geos in a room you have at least 3 opinions.

Kione
The Kione Sandstone is the main gas producing zone in the area and is above the Forbes. The Kione is thick and porous and has many penetration in the local area and a few wells have produced gas (<1 Bcf per well), elsewhere it can reservoir much larger fields but the well control already drill may restrict the volume here. click pic to enlarge.
The Kione is not the X1 which is probably Cenomonian (Boxer Fm) but no dating information has been released.


Coastal Rages?
By Coastal Rages do you mean Coastal Ranges? If so this is not a named formation for the Sacramento Basin. It is used for even younger Miocene rocks to the west - not surprisingly in the 'Coastal Range Mountains'. Its position in the cross section would hint at the Vernado Formation of the G Zone.
X4
You label the X4 Boxer and Ladoga. Since the two formations were laid down millions of years apart, I think you mean Boxer or Ladoga. Predrill all the X sands were estimated to be of either these ages (therefore the common 'I don't know' X nomenclature). When the rocks are dated, the X labels are replaced.
Reserves
Each zone needs to be tested, recalibrated to the 3D and the volumetrics/reserves remapped/recalculated. This is impossible to do without the logs and details of the tests and hopefully an independent reserves report is forthcoming.

DOGGR Sacramento Basin Strat Chart