This document discusses various topics related to offshore drilling rigs and operations including: rig selection and planning; exploration and production licenses; drilling pipes, casing, bits, and other equipment; risks from accidents like blowouts and collapsed rigs; well control methods; formation pressures; drilling fluids; petroleum geology concepts; casing and cementing; measurement tools; and high pressure high temperature subsea technology.
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Drilling seminar Sigve Hamilton Aspelund
1. Rig Selection and basic planning steps
Exploration and production licences
Exploration, development and abandonment
Well planning and design
Drilling pipes, casing, collar, kelly, tubing
Oil & gas delivery pipes
Drilling bits
Drilling personnel
Drilling economics
Drilling cost estimates
Communications and safety issues
Crisis management
Risk evaluation
Risk definition
Mapping of HSE & risks
Cause assessment
HSE analysis
Risk reduction
Barriers
Accidents
Offshore blowouts
Economics in accidents
Collapse of rigs
Sunk rigs
Pressure in fluids at rest
Hydrostatic pressure
Atmospheric pressure
Pore pressure
Darcy`s law
Hole sections and well trajectory
Units
Primary well control
Secondary well control
Tertiary well control
Formation pressure
Normal formation pressure
Abnormal pressure
Salt beds
Mineralisation
Tectonic causes
2. Formation fracture pressure
Leak-off tests and procedure
Rig components
Introduction to petroleum geology
o Sedimentology
o Classification of sedimentary rocks
o Texture in granular sediments
o Grain size
o Sorting
o Grain shape
o Packing
o Sand and sandstone and classification
o Porosity
o Permeability
o Controls on Porosity and Permeability
o Diagenesis
o Changes of porosity with burial depth
Completion/ workover fluids
Foam drilling fluids
Oil based muds
Synthetics
Water based muds
Casing
o Conductor
o Suface casing
o Intermediate casing
o Production casing
Liner
Sementing
Wire line operations
Measurement while drilling
o Systems
o Directional tools
o Gamma ray tools
o NGT tool
o SP log
o Sonic tool
o Density tool
o Neutron tool
Daily drilling report
Material balance equations
3. Drilling fluid economics
Drilling fluid properties
Pressure
Hydrostatic pressure
Pump pressure
Imposed pressure
Pressure imposed by the pump
Pressure imposed by the formation
Kicks
Swabbing of formation fluids into the borehole
Insufficient mud density
Poor well planning
Lost circulation
Recognition of kicks
HPHT subsea technology