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Dynaflodrill user guide Drillbench Dynaflodrill User Guide TABLE OF CONTENTS GENERAL Overview Areas of application MAIN ENVIRONMENT Overview CREATING A CASE FILE Overview The data model - DEML New session dml file Editing an existing session dml file Libr

Drillbench Dynaflodrill User Guide TABLE OF CONTENTS GENERAL Overview Areas of application MAIN ENVIRONMENT Overview CREATING A CASE FILE Overview The data model - DEML New session dml file Editing an existing session dml file Library Library editor INPUT PARAMETERS Description Survey Wellbore geometry String Surface equipment Injection system Drillstring gas injection Annulus gas injection Mud Reservoir Temperature EXPERT INPUT PARAMETERS RUN CONFIGURATION Batch configuration MENUS AND TOOLBARS File New Open Reopen Save Save as Save as template Save library Import Export Exit Edit Cut Copy Paste Page i Page Drillbench Dynaflodrill User Guide Undo View Well schematic Survey plot Log view Navigation bar Basic input Expert input Simulation Simulation Toolbar functionality Start Pause Continue Step Reset Load state from file Save state Results Keep previous results Import results Export results Manage results Add page Current page Load save layouts Tools Take snapshot Report Validate parameters Edit unit settings Options Help About RUNNING A SIMULATION Overview Controlling a simulation Simulation window Interactive simulation mode Batch simulation mode WORKING WITH DYNAFLODRILL RESULTS Plot page operations Plot management Set and plot selection Add Reset plot Remove plot Plot operations Maximize plot Normalize Swap with selected plot Track values Print Import Page ii Drillbench Dynaflodrill User Guide Page iii Export Copy image to clipboard Plot properties Profile plot operations Take snapshot Create trends at observation points Curve operations Copy curves Paste as custom curves Clear custom curves Trend plot switches Show timeline Show previous results Flip axes X axis Profile plot switches Show pore fracture pressure Show casing shoe Fade recent results Show minimum maximum Show previous results Slider Zooming D wellbore plots General functionality Select run Select curve Holdup fraction view Scale palette for entire run Multiple runs ?? keep results Improved results view Well schematic Create presentation graphics RHEOLOGY MODELS Generalized Newtonian models Bingham plastic model Power law model Robertson-Stiff model Pressure and temperature dependent rheology Friction factor Friction factor in laminar flow Friction factor in turbulent flow Transition from laminar to turbulent flow Frictional pressure loss model Beggs and Brill correlation with angle correction for liquid hold-up Semi-empirical pressure loss calculation KEYBOARD SHORTCUTS ACKNOWLEDGEMENTS Drillbench Dynaflodrill User Guide Page GENERAL Overview Underbalanced drilling UBD has firmly evolved into a new facet of the oil and gas industry Operators are applying this new technology to improve ultimate reservoir recovery and maximize the economics of production UBD has been utilized for specific applications such as limiting lost circulation A number of developments took place in the oil industry that caused the present increased interest in underbalanced drilling Underbalanced drilling still has some concerns to be addressed by future developments in the industry to broaden its applicability Among those is the engineering software required for pressure calculations to model well flow and gas lifting requirement during the design stage The flow modeling software can be divided into two categories steady state or static flow modeling and dynamic flow modeling The steady state flow modeling is useful for quick sensitivity analyses and parameters screening