Reading a well cross-section

Construction sequence and nominal diameters follow the supplied teaching illustration: 30 in conductor, 18 5/8 in surface casing, 13 3/8 in intermediate casing, 9 5/8 in technical casing, 7 in production casing, 4 1/2 in liner and 3 1/2 in tubing. Production casing shoe at 3,000 m, liner top at 2,900 m, reservoir top at 3,000 m, packer at 2,850 m and tubing end at 3,100 m are illustrative choices where the image does not specify exact depths. This is one conceptual completion, not a universal well design.

Casing geometry is schematic: diameter is visually expanded and depth compressed to show all strings. Cement bands are conceptual, not calculated volumes. The stage drawing represents installing a string into an already drilled hole, not drilling dynamics. Labels identify nominal outside diameters. An assumed tubing inside diameter of 0.85 times its outside diameter is used solely for the educational flow calculation.

Oil mode: one incompressible liquid, fixed density, Darcy friction factor 0.025, equivalent restriction K = 300. Oil occupies the liner sump then the tubing; the packer blocks the annular route. The simplified moving-column balance uses reservoir pressure minus surface pressure, hydrostatic head and flow resistance. No gas compression, reservoir inflow model, multiphase effects or BOP operation is simulated. Time is accelerated 40 times; displayed velocity is the modeled velocity, not animation travel speed. Construction dimensions and all inputs are illustrative, not design or operational guidance.