Primary production, the initial production stage, results from the displacement energy naturally existing in a reservoir.
Obviously, from the figure that, in the initial production stage, the flow rates is very high, but they also decline rapidly with the blockage of the screen.
Primary recovery occurs when the reservoir uses its natural energy to force the oil to the well bore, and it is usually referred to as the initial production stage.
From the graph, it is obviously show us that the flow rates of all the three are very high in the initial production stage, but they also decline very soon with the blockage of the screen, then the liquid production achieves initial stabilization along with production.
As for the land subsidence problem usually associated with geothermal development, we propose to re-inject the withdrawn geofluid into the same formation (in the case of extreme overpressure, however, injection into a shallower formation might be considered at the initial production stage).
High-yield wells in the Fanzhuang Block always have the following conditions: gas content > 20 m3/t; burial depth of 500 700 m; CRR > 0.7; LCH > 400 m; volume of frac sand > 40 m3; EDR of 30 60 m; and a decline rate of working fluid level lower than 2 m/day during the initial production stage.
In product design, the initial design stage is being increasingly emphasized because it significantly influences the successive product development and production stages.
These findings would fit with a three stage process, initial production of preplate neurons at E17, high rates of proliferation within the ventricular zone at E18, and migration of immature neurons and differentiation of migrated neurons within the cortical plate over E18-E20 [ 45, 46].
More importantly, this stage involves the initial production of CA once germs emerge on the conidia, which was subsequently followed by the fast CA-producing period, signifying that CA metabolism has entered the active phase.
The initial production process remains pretty similar, admittedly, but subsequent stages have radically diverged into far deeper and uncomfortable complexities.
