Petroleum Engineering 405 Drilling Engineering 1 Well Drilling Engineering Directional Drilling Dr DO QUANG KHANH 2 Directional Drilling When is it used? Type I Wells Type II Wells Type III We[.]
Well Drilling Engineering Directional Drilling Dr DO QUANG KHANH Directional Drilling I II III and Hold Build When is it used? KOP EOC Build-Hold and Drop Continuous Build Type I Wells Type II Wells Type III Wells Directional Well Planning & Design Survey Calculation Methods Read ADE Ch.8 (Reference) Inclination Angle θ, α, I Direction Angle φ, ε, A Max Horiz Depart ? 10 14 Fig 8.11 r1 < x and r1 + r2 < x 15 r1 < x and r1 + r2 > x 16 N18E S23E Azimuth Angle S20W N55W 17 18 Example 1: Design of Directional Well Design a directional well with the following restrictions: • Total horizontal departure = 4,500 ft • True vertical depth (TVD) = 12,500 ft • Depth to kickoff point (KOP) = 2,500 ft • Rate of build of hole angle = 1.5 deg/100 ft • Type I well (build and hold) 19 Example 1: Design of Directional Well (i) What is the maximum hole angle required (ii) What is the total measured depth (MD)? (MD = well depth measured along the wellbore, not the vertical depth) 20