площадь продуктивного горизонта(average horizontal area of that part of the reservoir that contains oil and/or gas, a region I will henceforth refer to as the gross pay zone.grafleonov)
площадь продуктивного пласта(average horizontal area of that part of the reservoir that contains oil and/or gas, a region I will henceforth refer to as the gross pay zone.grafleonov)