ALLOWANCE FOR EQUIVALENT CIRCULATING DENSITY WHILST CONSTRUCTING AN OVERLAY PRESSURE CHART FOR DIRECTIONAL AND HORIZONTAL WELL INTERVALS.
Leonov, Evgeny G. – Dr.Tech.Sci., professor, the State Gubkin University of Oil and Gas, bur220@gubkin.ru bur220@gubkin.ru
Fedin, Dmitry S. – postgraduate student, the State Gubkin University of Oil and Gas, dmitry.s.fedin@mail.ru dmitry.s.fedin@mail.ru

УДК 622.24
Key words: directional and horizontal wells, overlay pressure chart, equivalent circulating density.
The authors recommend to construct a pressure – well length chart for directional and horizontal wells, which will allow a more detailed analysis of wellbore properties as compared to a pressure-vertical well depth chart. It is recommended that equivalent circulating density be taken into account to show on the chart both hydrostatic pressure and hydrodynamic loss, which is especially important for extended reach wells.

ALLOWANCE FOR EQUIVALENT CIRCULATING DENSITY WHILST CONSTRUCTING AN OVERLAY PRESSURE CHART FOR DIRECTIONAL AND HORIZONTAL WELL INTERVALS.
Leonov, Evgeny G. – Dr.Tech.Sci., professor, the State Gubkin University of Oil and Gas, bur220@gubkin.ru
Fedin, Dmitry S. – postgraduate student, the State Gubkin University of Oil and Gas, dmitry.s.fedin@mail.ru

Key words: directional and horizontal wells, overlay pressure chart, equivalent circulating density.
The authors recommend to construct a pressure – well length chart for directional and horizontal wells, which will allow a more detailed analysis of wellbore properties as compared to a pressure-vertical well depth chart. It is recommended that equivalent circulating density be taken into account to show on the chart both hydrostatic pressure and hydrodynamic loss, which is especially important for extended reach wells.