Drilling EngineeringDirectional Drilling
Target TVD Increase from Bed Dip and Departure Formula
Target TVD Increase from Bed Dip and Departure calculates target tvd increase due to bed dip for directional drilling workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (DEP, dip) are known and the assumptions behind the cited directional drilling relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, dTVD_target equals 31.79513 ft.
DEPft
363.42
dipdegree
5
Inputs
DEP
ftHorizontal Departure to Target
dip
degreeApparent Bed Dip in the Horizontal-Well Plane
Outputs
dTVD_target
ft
Target TVD Increase Due to Bed Dip
DEP
ft
Horizontal Departure to Target
Source and review
reviewedDrilling Manual horizontal directional drilling calculations, target TVD change from bed dip.
Source