Schlumberger

Mnemonics, Software product, WELLTRAK


CodeWELLTRAK
NameWellTRAK
DisciplineDrilling
TypeAPPLICATION
DescriptionDrilling Information System


Related parameters
ParameterDescription
1_MINUTE_GEL_STRENGTH Shear Stress required to break a gel fluid previously allowed to remain at rest for 1 minute.
1_MINUTE_GEL_TEST_DEFLECTION The maximum reading (deflection) taken from a direct-reading viscometer after the fluid has been quiescent for 1 minutes.
10_MINUTE_GEL_STRENGTH Shear Stress required to break a gel fluid previously allowed to remain at rest for 10 minutes.
10_MINUTE_GEL_TEST_DEFLECTION The maximum reading (deflection) taken from a direct-reading viscometer after the fluid has been quiescent for 10 minutes.
10_SECOND_GEL_STRENGTH Shear Stress required to break a gel fluid previously allowed to remain at rest for 10 seconds.
10_SECOND_GEL_TEST_DEFLECTION The maximum reading (deflection) taken from a direct-reading viscometer after the fluid has been quiescent for 10 seconds.
30_MINUTE_GEL_STRENGTH Shear Stress required to break a gel fluid previously allowed to remain at rest for 30 minutes.
30_MINUTE_GEL_TEST_DEFLECTION The maximum reading (deflection) taken from a direct-reading viscometer after the fluid has been quiescent for 30 minutes.
API_PLASTIC_VISCOSITY Measure of the internal resistance to fluid flow attributable to the amount, type, and size of solids present in a given fluid. When using the direct-indicating viscometer, it is found by subtracting the 300-rpm reading from the 600-rpm reading of a Fann35 rheometer.
API_YIELD_STRESS Resistance to initial flow; the stress required to start fluid movement. When using the direct-indicating viscometer, it is found by subtracting plastic viscosity (API_Plastic_Viscosity) from the 300-rpm reading of a Fann35 rheometer.
BHA_NUMBER Number assigned to a bottom hole assembly (BHA) at the wellsite
BHA_RUN_NUMBER Number assigned to a bottom hole assembly (BHA) when it is run into the hole
BIT_NUMBER Number assigned to a bit at the wellsite inventory
BIT_OPERATING_TIME Operating time of the bit over the reporting period.
BIT_RUN_NUMBER Number assigned to a bit when it is run into the hole
CASSON_PLASTIC_VISCOSITY Measure of the internal resistance to fluid flow attributable to the amount, type, and size of solids present in a given fluid. The Casson model equation is: SQRT(Shear_Stress) = SQRT(Yield_Stress) + SQRT(Plastic_Viscosity X Shear_Rate)
CASSON_YIELD_STRESS Resistance to initial flow; the stress required to start fluid movement. The Casson model equation is: SQRT(Shear_Stress) = SQRT(Yield_Stress) + SQRT(Plastic_Viscosity X Shear_Rate)
CIRCULATING_PRESSURE Fluid pressure under circulating conditions.
CIRCULATION_LOSS_DEPTH Depth at which circulation is being lost to the formation.
CIRCULATION_LOSS_RATE Rate of loss of drilling fluid to the formation, due to mud density exceeding formation fracture pressure gradient, and/or to drilling through a highly permeable formation.
ELECTRICAL_STABILITY Measure of the emulsion stability and oil-wetting capability in oil based drilling fluid muds.
FIT_EQUIVALENT_MUD_WEIGHT Equivalent mud weight determined by the formation integrity test (FIT) for a new formation below last casing shoe via increasing the pressure until a pre-determined value.
FRACTURE_PRESSURE_EMW Fluid pressure in the wellbore required to undergo hydraulic fracturing, expressed in terms of equivalent mud density.
HTHP_FILTER_CAKE_THICKNESS Thickness of filter cake produced under high temperature, high pressure (HTHP) conditions.
HTHP_FILTRATE_VOLUME Volume of filtrate produced under high temperature, high pressure (HTHP) conditions.
JAR_OPERATING_TIME Operating time of the jar over the reporting period.
LOT_EQUIVALENT_MUD_WEIGHT Equivalent mud weight determined by the leak off test (LOT) for a new formation below last casing shoe via increasing the pressure until the formation starts taking fluid.
LTLP_FILTER_CAKE_THICKNESS Thickness of filter cake produced under low temperature, low pressure (LTLP) conditions.
LTLP_FILTRATE_VOLUME Volume of filtrate produced under low temperature, low pressure (LTLP) conditions.
LWD_OPERATING_TIME Operating time of the logging-while-drilling (LWD) equipment over the reporting period.
MATERIAL_ADDITION_COUNT Number of packaging units of chemicals added to the drilling fluid. (e.g., Add 5 sacks of Barite C100 100lb/sack to the drilling fluid)
MATERIAL_ADDITION_DEPTH_INCREMENT The depth increment at which the material addition takes place (e.g., Add 5 sacks of Barite C100 100lb/sack to the drilling fluid each 500 ft)
MF_TITRATION_VOLUME Amount of 0.02 normal (N/50) standard sulfuric acid required in order to turn the color of methyl orange indicator solution from yellow to pink when determining methyl orange alkalinity of the mud filtrate, Mf, API RP13 Section 8, Chemical Analysis.
MOTOR_OPERATING_TIME Operating time of the motor over the reporting period.
MUD_FILTRATE_METHYL_ORANGE_ALKALINITY_MF The volume ratio of 0.02 normal (N/50) standard sulfuric acid (Mf_Titration_Volume) including that amount required for the Pf endpoint (Pf_Titration_Volume) to mud filtrate, API RP13 Section 8, Chemical Analysis.
MUD_FILTRATE_PHENOLPHTHALEIN_ALKALINITY_PF The volume ratio of 0.02 normal (N/50) standard sulfuric acid (Pf_Titration_Volume) to mud filtrate volume, API RP13 Section 8, Chemical Analysis.
MUD_PHENOLPHTHALEIN_ALKALINITY_PM The volume ratio of 0.02 normal (N/50) standard sulfuric acid (Pm_Titration_Volume) to mud volume in API Mud Phenolphthalein Alkalinity test (API RP13 Section 8, Chemical Analysis).
MUD_PUMP_MONITORING_PURPOSE The purpose of the mud pump monitoring. It can be either for well control or monitoring the pump parameters at working conditions.
MWD_OPERATING_TIME Operating time of the MWD equipment over the reporting period.
OPTIMUM_FLAG Indicates whether the activity, process or solution is optimum.
PF_TITRATION_VOLUME Amount of 0.02 normal (N/50) standard sulfuric acid required in order to turn the color of phenolphthalein indicator solution from pink to colorless when determining phenolphthalein alkalinity of the mud filtrate, Pf, API RP13 Section 8, Chemical Analysis.
PM_TITRATION_VOLUME Amount of 0.02 normal (N/50) standard sulfuric acid required in order to turn the color of phenolphthalein indicator solution from pink to colorless when determining phenolphthalein alkalinity of the mud, Pm, API RP13 Section 8, Chemical Analysis.
PORE_PRESSURE_EMW The pressure of the fluid contained in the pore volume, expressed in terms of equivalent mud density.
ROTATING_WEIGHT Surface weight of the drillstring while drilling


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