The Donald Duck Oil & Gas Co. drilled the Midterm 22-1 as a wildcat in Boondocks County of the State of Magic Kingdom.The well reached a total depth of 5,825 feet (Drillers Depth).Based on oil and gas shows noted by the well site geologist, the company suspects that there is potential pay.You have been rushed a fairly complete suite of logs in two runs.Answer and defend all opinions and conclusions with the appropriate analysis and plots.Generate a report and attach all plots in a word/pdf or paper document.Please include your name. You can insert in the questions below.
Run 01 – LAS and Excel
DEPT.FDepth Curve
GR.GAPIGAMMA RAY
SP.MVSPONTAMEOUS POTENTIAL
QLRA.—-RX0/RT QUICK LOOK RATIO
ILD .OHMM DEEP INDUCTION
ILM .OHMM MEDIUM INDUCTION
SFL .OHMM SPHERICALLY FOCUSED LOG
TENS.LBFTENSION
Run 02 – LAS and Excel
DEPT.FDepth Curve
GR.GAPIGAMMA RAY
CALI.INCALIPER
PEF .PEFPHOTO ELECTRIC FACTOR
DPHI.V/VDENSITY POROSITY
NPHI.V/VNEUTRON POROSITY
RHOB.G/C3BULK DENSITY
DRHO.G/C3DELTA RHO
V1M3.V/VLIMESTONE
V2M3.V/VSANDSTONE
V3M3.V/VSHALE OR DOLOMITE
MINV.OHMMMICROINVERSE
MNOR.OHMMMICRONORMAL
3. Quick-Look
Examine the log from the Donald Duck Oil and Gas Midterm 22-1 well, and answer the following questions.Please justify all of your answers.
What is the general lithology of the following intervals?How did you justify your conclusions?
What is the average porosity of the following intervals?
- Zone A – 5400 to 5450
- Zone B – 5660 to 5670
- Zone C – 5750 to 5760
Are there any fluid/gas effects visible in any of the zones?
4. LAS Log Header
Examine the LAS headers and answer the following questions.
What is Maximum Bottom Hole Temperature?
What is the Rmf (Resistivity of Mud Filtrate) at what temperature?
What is the total depth of the log (TD)?
Examining the log for Zone B, what do you think is the fluid in the pores?Why?
What is the shale base line on the SP log?
What is the SSP of the SP log at zone C?
Compute the geothermal gradient, the estimated salinity (NaCl equivalent), the formation temperature, and the resistivity of the formation water at Zone B (Rw). Use an average mean surface temperature of 55oF.
5. Density Porosity – Neutron Porosity cross plots
Construct Density Porosity – Neutron Porosity cross plots for the following intervals.
- Zone A – 5400 to 5450
- Zone B – 5660 to 5670
- Zone C – 5750 to 5760
What is the lithology for each interval?Any fluid effects?
6. RHOmaa-Umaa crossplots
Construct RHOmaa-Umaa crossplots for the following intervals.
- Zone A – 5400 to 5450
- Zone B – 5660 to 5670
- Zone C – 5750 to 5760
What is the lithology for each interval?Are there any fluid effects?
Hint-make sure that Density Porosity & Neutron Porosity logs are in the correct formats (i.e., decimal or percent).
Extra Credit (10 points) – Generate a lithology solution for the interval from 5400 to 5800 feet.
7. Fluid Saturation
Using the Rw from section 4 and a=1, m=n=2 what is the water saturation Sw and Sh (1-Sw) for various depths in
- Zone A – 5400 to 5450
- Zone B – 5660 to 5670
8. Pickett Plot
Construct a Pickett Plot for Zone A at the following depths
- Zone A – 5400 to 5450
- Zone B – 5400 to 5468
Use the same parameters as in section 7.
What is occurring in each depth range?Discuss the Pickett Plot.
9. Recommendations
What would you tell the company as concerns completing or not completing the well?Be specific as to fluids expected and depths.
0 comments