Her displacement dropped to 11441 LT with the loss of her armour and guns, and her speed was limited to 12 kn.
Conventional CO2 flooding and CO2 production control flooding are conducted successively in the 3D models, and flooding efficiency is evaluated through oil recovery increments and changes in the displacement pressure drop curves.
Using the steady-state method, the relationship between displacement pressure-drop and flow rate is experimentally investigated in this paper.
The displacement of drops of KCl (100 mM) was carried out under a tension of 120 VDC.
Open image in new window Fig. 19 Relationship curve of temperature and displacement pressure-drop (horizontal wells, #13161) Open image in new window Fig. 20 Relationship curve of temperature and displacement pressure-drop (horizontal wells, #13121) Open image in new window Fig. 21 Relationship curve of temperature and displacement pressure-drop (horizontal wells, #13041).
Under the same conditions of temperature distribution and displacement pressure-drop, the single-well productivity with a low oil viscosity (#13041) is the highest.
As shown, for vertical wells and horizontal wells, with the increase of displacement pressure-drop, the threshold temperature (or the certain-productivity temperature) shows a reducing trend.
For the certain productivity temperature, a logarithmic relationship between displacement pressure-drop and temperature could be observed in these three oils.
For the heavy crude oil #13161 and 13121, the threshold temperature also shows a logarithmic relationship with the displacement pressure-drop.
However, as the Figs. 18, 19, 20 and 21 shown, for the heavy crude oil #13041, the threshold temperature and displacement pressure-drop show an exponential relationship.
