Examine the page and feel with your hands for signs of raised perforation and pressure, signifiers of the paper being pressed on the relief block.
Considering the specific physical properties of multi-thermal fluid, fluid absorption in perforation holes and pressure drop characteristics along the horizontal wellbore, this paper developed the flow and heat transfer model of multi-thermal fluid in perforated horizontal wellbore.
After integrating the point sink solution over the perforation direction, the pressure response of any perforation hole in the formation is obtained.
The deepwater testing operation runs periodically and typically consists of four stages: deployment/retrieval mode, pressure perforation mode, flowing test mode, and shut-in well mode.
For this example, the fatigue damage in the deepwater test string in a service cycle is 4.706e−6, including 8.427e−7 (17.91 %) in the deployment/retrieval mode, 5.910e−8 (1.26 %) in the pressure perforation mode, 2.396e−6 (50.91 %) in the flowing test mode, and 1.409e−6 (29.93 %) in the shut-in well mode.
The blood will clot, sealing the perforation and restoring pressure in the spinal membrane.
The validated CFD model is used to carry out a parametric study of the influence of the number and positioning of circular perforations, which shows that the Nusselt number increases monotonically with the number of pin perforations, while the pressure drop and fan power required to overcome the pressure drop all reduce monotonically.
The closer the WOC is to the perforation, the faster the pressure drop will supersede the hydrostatic pressure at that contact.
It contributes to the determination of the hydraulic pressure and perforation orientation and drilling direction.
By carefully selecting a set of optimal well locations, perforation intervals, and bottomhole pressure constraints that lead to maximum CO2-in-place and minimal CO2 breakthrough at the producers, an injection rate ranging from 10.8 to 15.1 Mt/year is achieved for a duration of 50 years.
