Therefore, it is essential to predict under what production conditions (wellbore flowing pressure or production rate) sanding will occur and when sand control is needed.
A direct field application shows that the bottomhole flowing pressure, reservoir pressure, injection pressure, oil rate, gas-oil ratio and water-cut can be adjusted and optimized.
Five operational parameters of the miscible CO2 injection process are considered, including bottom-hole flowing pressure (BHP) of injection well (psi), CO2 injection rate (MMSCF/D), injected CO2 concentration (mole fraction), bottom-hole flowing pressure (BHP) of production well (psi), and oil production rate (STB/D).
In addition, gas lift may not lower the flowing pressure as much as an optimized pumping system; there are several advantages of a gas lift system that often make gas lift the artificial lift method of choice.
The Inflow Performance Relationship (IPR) describes the behavior of the well׳s flowing pressure and production rate, which is an important tool in understanding the reservoir/well behavior and quantifying the production rate.
Then, based on the relationship between reservoir pressure and bottom hole flowing pressure corresponding to different drilling modes, the experimental procedures on reservoir damages in three drilling modes (e.g. gas drilling, liquid-based underbalanced drilling and overbalanced drilling) were designed.
In order to evaluate the miscibility effect of CO2 flooding, injection and well production data were analyzed, including injection pressure, bottom hole flowing pressure (BHFP) of producer wells, CO2 breakthrough time and produced oil and gas compositions.
The research idea is to close the wellhead wing valve, to measure the wellhead flowing pressure before and after closing the well head valve, and to record the total shut-in time period.
Actual flowing pressure data.
Wellbore flowing pressure (psi).
Bottom-hole flowing pressure, psia.
