If the water wells in the study area are generally screened in the most productive intervals of the aquifers only, then aquifer thickness can be defined as the total length of screened interval (e.g., Mace et al. 2000).
In this study, aquifer thickness is defined as the total length of screened interval in the well because water wells in the valley's aquifers are generally screened only in the most productive intervals of the aquifer (revealed by several borehole data collected from various sources).
Since the Eagle Ford Shale was recognized as a major gas shale play in 2008, exploration there has been geared toward delineating fault-related fracture zones, as well as stratigraphic layers having abundant minor faults and brittle zones, to find the most productive intervals (Kuich 1989; Treadgold et al. 2011).
The Paleogene Dainan Formation is one of the most productive reservoir intervals in the Gaoyou Depression, North Jiangsu Basin (Qiu et al. 2006).
Of this, the Dainan Formation (E2 d) has a thickness of approximately 1500 m and has been one of the most productive reservoir intervals in the Gaoyou Depression over the last 30 years, hosting over 15 oil gas fields containing about 4.1 × 108 tons of recoverable oil.
It is assumed that, at intervals, productive infection occurs in mucosal epithelial cells even in normal individuals and that these mucosal cells are infected in turn via circulating hematopoietic cells after local reactivation of latent virus.
Ten crude oils from two recovery stages spanning 5 10-year interval of five productive wells in the Tarim Basin, northwest China were analyzed for their compositional modification during production process.
Geochemical characteristics were investigated using GC, GC MS and stable carbon isotope in 36 oils from three recovery stages spanning an 8-month interval for 12 productive wells in the Qudi oilfield.
The 10 minutes that followed the interval proved far more productive for Scotland.
Also at the well location, although the well may penetrate a productive shale, but in the same interval, away from the well location there might be non-productive shale sections.
