AssLog QC
Content
DEPARTMENT OF PETROLEUM ENGINEERING
Please note all works must be clear, legible and will not be accepted without a cover sheet. It is student’s responsibility to ensure they keep a copy of ALL works submitted for assessment.
Student Name:
Student Number:
Unit Name:
Assignment Title:
Lecture:
Due Date:
STAFF USE ONLY
Overall Mark Comments ______________________________________________ ______________________________________________ __________
Curtin University Department of Petroleum Engineering
Formation Evaluation
Exercise 1 - Log Display and QC of South Pepper-1 Your task is to Quality Control (QC) and plot the wireline log data for the South Pepper-1. You have been provided with the following data: (a) digital well log file (*.las), and (b) Adobe Acrobat (*.pdf) plot of the well log as a reference. The aim of this exercise is to make the appropriate corrections to the South Pepper-1 raw data, so that the well data can be displayed as a composite log. This should be a quick QC, with a list of corrections that need to be made to these logs. Hand in a hardcopy of the log display(s), neatly highlighting the corrections (by hand). Try and follow the scales and combinations used in the PDF log plot. Hints 1) Using Excel, check that all of the logs are on depth. If there are any logs off depth then shift the log by the appropriate depth and make a note of your changes (you may wish to keep a copy of original log?) 2) Check the condition of the hole quality by firstly using the caliper log. You can create a bad hole flag if required, using different cut offs. Compare the cut-off flag to your log responses. 3) Check that the log readings have a sensible range, and correspond with one another on depth.
Answer the following questions in your report: (1) What is the bit size over the logged interval? (2) Is hole condition a problem in this well, and has it impacted on the log readings of any of the tools? Note: You will be limited by your plotting capabilities in Excel, but try and replicate the log display given, to the best of your ability. If required, you can re-print copies of the PDF to highlight any areas where the log data requires editing, correction, or where data quality is questionable. You can include a neat, hand labelled and highlighted print out in your report.
Exercise 1
The Caliper Log and Log QC
Please note all works must be clear, legible and will not be accepted without a cover sheet. It is student’s responsibility to ensure they keep a copy of ALL works submitted for assessment.
Student Name:
Student Number:
Unit Name:
Assignment Title:
Lecture:
Due Date:
STAFF USE ONLY
Overall Mark Comments ______________________________________________ ______________________________________________ __________
Curtin University Department of Petroleum Engineering
Formation Evaluation
Exercise 1 - Log Display and QC of South Pepper-1 Your task is to Quality Control (QC) and plot the wireline log data for the South Pepper-1. You have been provided with the following data: (a) digital well log file (*.las), and (b) Adobe Acrobat (*.pdf) plot of the well log as a reference. The aim of this exercise is to make the appropriate corrections to the South Pepper-1 raw data, so that the well data can be displayed as a composite log. This should be a quick QC, with a list of corrections that need to be made to these logs. Hand in a hardcopy of the log display(s), neatly highlighting the corrections (by hand). Try and follow the scales and combinations used in the PDF log plot. Hints 1) Using Excel, check that all of the logs are on depth. If there are any logs off depth then shift the log by the appropriate depth and make a note of your changes (you may wish to keep a copy of original log?) 2) Check the condition of the hole quality by firstly using the caliper log. You can create a bad hole flag if required, using different cut offs. Compare the cut-off flag to your log responses. 3) Check that the log readings have a sensible range, and correspond with one another on depth.
Answer the following questions in your report: (1) What is the bit size over the logged interval? (2) Is hole condition a problem in this well, and has it impacted on the log readings of any of the tools? Note: You will be limited by your plotting capabilities in Excel, but try and replicate the log display given, to the best of your ability. If required, you can re-print copies of the PDF to highlight any areas where the log data requires editing, correction, or where data quality is questionable. You can include a neat, hand labelled and highlighted print out in your report.
Exercise 1
The Caliper Log and Log QC
