Excellent find Lanman.

"In a BCGA, hydrocarbons do not accumulate conventionally, in structural or stratigraphic traps, but rather in cells. Due to the geological setting of the Makó Trough, the hydrocarbon cell here forms a relatively continuous zone marked by considerable internal lithological and petrophysical variability. The most prolific parts, called sweet spots, possess a reservoir potential higher than the average. The identification of these sweet spots constitutes one of the most important, and quite possibly the most challenging task of the entire exploration project."

So, explaining it in layman's term, the structure of the cells in the Makó Trough do not resemble the structure of the basin-centered gas accumulations such as the Rocky Mountains in the U.S. where the gas bearing cells are seperated from one another, and the trick is to hit more than one cell while you are drilling the borehole. Here in the Makó Trough the entire Szolnok structure could be viewed as a giant gas bearing cell and within this giant cell there are large cells that maybe several hundred cubic kilometers in size.

Now, that is what I call a sweet spot :)

"The top and bottom boundaries of the cell essentially coincide with the turbidites of the Szolnok Formation and the top of the pre-Neogene basement, respectively. In light of the fact that pressure, temperature, and maturity tests have produced rather similar results in a number of wells in the area, we have reason to believe that the extension of the Makó Trough’s BCGA is of regional dimensions (>1000 km2). The thickness and lateral extension of the potential reservoirs yield a cell volume as great as several hundred km3 – the largest single prospective gas occurrence in Hungary to date."