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What is accuracy of Depth?
- +/- 5ft/10,000
- +/- 2ft/10,000
How often does IDW need to be calibrated?
Every 6 months, 50 jobs, 500,000ft cable
What should RULS-RULB be less than?
the re-tool zero should never be greater than what?
+/- 2ft /10,000ft
On subsequent trips, how much difference should there be with the reference pass and down log?
5ft/10,000ft if more, invesitgate
How to do a FIT 1 of IDW
Clean IDW (Do not use pressure washer near electrical connectors)
Check axels, wheels, etc for good condition
How to do a FIT 2
There is NONE
Spin wheels up and down to ensure ENC1 and 2 are movign correct
Pass screwdriver by mark detector
Correct rollers and cable guides are adjusted to right level
How many truns on IDW encoder is 50 ft?
Trim on IDW?
Send in for calibration
What is the WC equation?
WDC + CRC + WWC
Wheel diam corr, cable rolling corr, and wheel wear corr
What is the stretch corr calc?
Stretch = (Tu-Td)/2 *E0*Depth
What is the limit for slippage? E1-E2
When should u recal a CMTD?
Every month, when strain axle has been replaced, change of cable type, CMTD measuring rollers are replaced, DTI2 card replaced
What goes on cable card
Wrap test, wrap test score, the head (serial number, weakpt, date built) cable serial number, CMTD and IDW cal date and serial numbers, Drum serial number and collector serial number and date collectro was built and splice pts
Basically, Cable, head, drum, ropesicket, and collector information
What is the SWL of cable if it is spliced?
- 80% SWL unless theres a swivel
- more concernec about torquing
How many wraps should be left on the drum when logging?
2 layers + 2 wraps
What is the best way to estimate the amt of cable on the drum?
Cable length advisor in tension module in tool planner
How many splices can one cable have
no more than 1 is recommended, however, 3 have been know to be on one cable before
Can a new cable be ran without a swivel?
This is not recommended as the new cable has a significant amount of permanent stretch that has yet to be taken out
What should you do while RIH/POOH with a spliced cable?
- Set the alarms if you need to for nearing the splice.
- Slow down the winch and check the integrity of the cable i.e armor coming apart, shims showing, etc
Slow the winch to <6000'/hr when splice is going over sheave wheels
Mark it on Zchart
What is the vertical res of the neutron/GR?
What is DOI of Neutron/GR?
What is repeatability of Neutron/gr?
- 0-20 pu +/-1
- 30 pu +/- 2
- 45 pu +/- 6
GR - +/-5%
What are the applications of neutron?
GR, total porosity, aqcceleration
What are the hole size min/max for neutron?
unless bigger bowspring up to 21"
air hole tools
density, ait, spectral
what is anhydrite in ECS/pyrite?
Sulfate minerals commonly in carbonate/evaporite sequences
Pyrite - Iron sulfide mineral occurs in close proximity to siliclastic HC resevoirs
Follows density poro, crosses density in hc zone, lower in gas, higher in shale, mirrors GR
What is vertical res of Density?
2,8,18 (very high, high res, and standard)
What is DOI of Density?
What oil is used for neutron?
Exxon Univis J26
(Nyco for hot wells)
What are applications of density?
Bulk density, PEF, microres, caliper
what are min/max HS for density?
5.5" (w/o eccenter)-21.5"
Why the master cal of density?
What are densities of Al/Mg?
2 blocks so we can get 4 pts and form a straight line
- 2.596/1.686 (both end of spectrums)
- Pef - 2.57/2.65
What are reconstruction errors of Density supposed to be?
What is the DPHZ formula?
DPHZ = MDEN-RHOZ/MDEN-FD
How many windows on a density?
What are 5 things density solve for?
- MC density
- MC pef
- Form dens
- Form pef
- MC thick
What is repeatability of density?
What about mastercal for neutron...what does it simulate?
18% porosity @75 deg F - The poro comes form the space bw the housing and the tank
Why do we measure wear of neutron housing?
So it doesnt effect the 18% poro and so that if it gets below 3.27, we know to change it so it doesnt implode due to reduction in press rating
Vertical res of AIT?
Oil in AIT?
Texaco Capella WF32
Min/max HS in AIT?
Need to be aware of standoffs
What is oil in HRLA?
Supposed to be Exxon Univis J26
Why does a special 369 need to be used for HRLA/CMR?
Line 9 and 10 are shorted in 369 so line 9 can act as ref voltage
Hole size for HRLA?
5-16" use standoffs accordingly
Why HRLA set to eccentered?
We cant gurantee that it will be perfectly centered
What are the densities of Sandstone, dolomite, limestone,shale, and anhydrite?
- Limestone - 2.71
- Dolomite - 2.87
- Sandstone - 2.65
- Shale - 2.1-2.8
- Anhydrite - 2.98
- Lime - 5.1
- Sand - 1.8
- Dolomite - 3.1
- Anhydrite - 5.1
- Shale - 1.8-6.3
What is oil for BHC?
Texaco Capella WF32
What should DT in BHC read in Limestone, sandstone, casing?
- Sand - 51.2-55.5
- Lime - 47.6
- Casing - 57
What is wyllie equation?
What are the apps for BHC?
Primary poro, litho ID, corr, synthetic seismograms, CBL, VDL
What are CBL rec distance and VDL?
3ft and 5ft
Difference bw CBL and BHC
- BHC - E2, 2 trans, 4 rec
- CBL - E1. 1 trans, 2 rec (3 ft), top trans
Hole size for BHC?
5-18" accoridng to ORM LQCRM to 12.25" and beyond 14" run eccentered
Holesize for DSI?
PPC extenders needed, and LCMEs in HS 12.5" or up
What is SAM 1-4?
- Sam 1 - Low dipole
- Sam 2 - Upper
- Sam 3 - Stoneley
- Sam 4 - P&S
How many receivers SS has?
13 receiver stations at 8 azimuthal angles each
Oil in SS?
Shinitzu silicone oil
Hole size SS?
13.375 max for CH
PPC extenders are needed, and LCMEs over 12.5" holes
Why do we need to mastercal the ss?
So we can get the new and old receivers together and on the same page (same gain)
Vertical casing check verifies this
What is difference bw SS and DSI?
- SS has more receivers
- SS is characterized (more solid tool)
- SS can account for dispersion (chirp freq)
- SS can record in all frequencies
What is vertical res of FMI?
How is FMI-HD diff form reg FMI?
Improved processing, embedded inclometer, and firmware/BER downloading
Apps for FMI?
Sedimentary eval, faults, fractures, drilling induced, acceleration and inclination dips, BH imaging
Oil for FMI?
Univis J26 for sonde
Pads is silicone
What is vertical res of ECS? DOI?
Hole size for ecs?
What is the radial curvature of pads of FMI
What is HS for spectral?
What does master cal do on spectral?
MCal compares down hole sensors to a known value
What is vertical res for USIT?
- Casing to cement interface
Oil in USIT?
Silicone oil in transducer and Capella (Esso) in sonde
Casing size for USIT?
What are apps for USITs?
Cement eval, casing inspection (corrosion, detection of internal or external damage, casing thickness analysis for collapse and burst press calcs)
Waht does USIT flouid properties measure?
ZMUD should be close to theoretical, eccentering flags, plate thickness
What is most critical parameter on USIT?
Diff bw IBC and USIT?
IBC - Solid- Gas map which is a model tfor acoustic impedance threshold
Cement eval is better in the addition os a 2nd measurement which responds independantly in Annulus
The addtional felxural attenuation meas improves cement eval (like for light weight cement, foam or contaminated cement and in heavy muds ot thick casing)
FPM downlog is eliminated
What is main pt XPT?
- Insert probe into resevoir and allowing small amt of fluid into a close volume of tool.
- (When flow stops the pressure the fixed volu,e should be theoretically equal to pressure in resevoir)
What is XPT hole size?
What is oil in XPT?
Univis J26 or fluorinert
What are apps to XPT
Pressure, mobility, perm
Can combine with other data to form a reservoir model
Understand fluid movement
What is PPC HS?
- Standard - 10.5" eccentered 18" centered
- extesnions to 21" ecceneted 40" centered
Specified sonde oil
RST hole size
2 3/8- 9.625
Apps fo RST
Sigma, inelastic capture, poro, C/O ratio, water flow log
Apps for CBL?
Cement bond, zone isolation, TOC