Digital Core Databases

Transcription

1 Digital Core Databases Data Collaboration, Integration and Re-Interpretation: A CASE STUDY Presenter: Darryl Soderberg (Project Manager/Geologist)

2 Digital Core Databases Data Collaboration, Integration and Re-Interpretation: A Case Study Digitize and Update the data for 300+ Syncrude wells cored between Digitization of Legacy Hard Copy Data. 2. Combining of both digital and hard copy data in a usable format. 3. Integration of various types of data (lab reports, wireline logs, images, geological reports). 4. Re-Interpretation and Evaluation of both existing and new data.

3 Evolution of Digital Data Hardcopy Data - Paper Geophysical logs - Core images - Geological reports - Field Reports Need for more user friendly data (digital logs, images, lab reporting) - Digital Data made available to anyone anytime - Importable into a multitude of programs, scalable, transferable, and easy to dissect - Storage (Where? How do I find my data? Easily Accessible In One Location!

4 Evolution of Digital Data Integrated Approach - All in one software - Contain all of my digital data core well files core logging data panels - 24/7 accessible - Integrated Design - Ability to Manipulate / Modify the data - Customizable Exports

5 Digital Database: Case Study Digitize and Update the data for 300+ Syncrude wells 1. Digitization of Hard Copy Data. 2. Re-evaluate (modify) depth correction. 3. Update Litho-facies Codes for each well. 4. Provide Additional Geological Information as it pertains to each well.

6 Data Digitization: Core Images

7 Data Digitization: Core Images 1. Digitization of Core Images 2. Improve Image Quality 3. Remove Background Noise 4. Add Core Depth Information

8 Data Digitization: Wireline Logs 1. Digitization of Wireline Logs 2. Improve Log Quality/Removing Background Noise 3. Convert all logs to metric scale 4. Aligning logs with Stacked Core Image

9 Data Digitization: Analytical Data UWI Sample Upper Depth (m) Sample Lower Depth (m) Sample Thickness (m) Porosity Bulk Mass Oil Ratio Bulk Mass Water Ratio Bulk Mass Sand Ratio Plug Number 1AB/ W4/ NA0000 1AB/ W4/ FD0001 1AB/ W4/ FD0002 1AB/ W4/ FD0003 1AB/ W4/ FD0004 1AB/ W4/ LC0000 1AB/ W4/ FD0005 1AB/ W4/ FD0006 1AB/ W4/ FD0007 1AB/ W4/ FD0008 1AB/ W4/ FD0009 1AB/ W4/ LC0000 1AB/ W4/ FD0010 1AB/ W4/ FD0011 1AB/ W4/ FD0012 1AB/ W4/ FD0013 1AB/ W4/ FD0014 1AB/ W4/ FD0015 1AB/ W4/ NA0000 1AB/ W4/ FD Digitization of Analytical Data 2. Convert all Analytical Data to Metric 3. Remove Excess information, Fill in the Gaps (NA zones, Lost Core, etc.) 4. Import into software, align with core data

10 Data Digitization and Modification 1. Digitization of Geological Information 2. Addition of Drilling/Auger Data 3. Updating the Facies/Lithological Schemes

11 Digital Data Importing External Data Field Data (Recovery sheets, License, Field Records, On-site-Images (Drill Cuttings), etc.) Wireline log data (Las, Borehole Images, Dip-meter, Micro-Resistivity, Raster Images). Geological Facies/Stratigraphic Schemes Lab Resulting Data (Bitumen Saturation, Particle Size, Permeability /Porosity, Thin Sections, etc..). Any external lab data with data structures represented by histograms, point data, and interval data. Digitally Converted Hard Copy Core Images Wireline Logs Core Images Lab Reports Geological Data

12 Data Integration and Quality Control 1. Combining the Depth Corrected Core images with the Associated Geological Data

13 Data Integration 1. Combining the Geological Data, Stacked Core image and Associated Analytical Data.

14 Data Integration 1. Combining the Analytical Data with the Core Images

15 Does the data make sense?? Data Modification/Re-Interpretation 1. Do the contacts/boundary markers identified on the core photos match the corresponding geophysical log cures? 2. Does the resulting analytical data match the core images and corresponding geophysical log curves? 3. Do the facies/lithological units correspond to the core images? 4. Is there relevant data missing from the original geological interpretation? 5. Can I provide additional information regarding the geological interpretation of each well?

16 Data Modification/Re-Interpretation Data Quality Control Depth Correction Do the original lithological contacts match the log traces? Points of Contention: 1. Inaccurate Depth Correction 2. Issues with the Core Image Layout 3. Concerns with the Wireline Logs (source data)

17 Data Modification/Re-Interpretation Data Quality Control Depth Correction Do the original lithological contacts match the log traces? Conclusions: 1. Original Depths off by as much as 2.0m in some areas 2. Different Methodologies used for Depth Correction (set at Ground Level/Kelly Bushing) 3. Core Images (in their current positions do not match)

18 Data Modification/Re-Interpretation Data Quality Control Depth Correction Overall of Implications of Modified Depth Correction 1. Adjust the core depths: re-interpretation of the well 2. Re-evaluate Formation Tops 3. Re-evaluate Top/Base of Pay 4. Re-evaluate Pay Thickness

19 Data Modification/Re-Interpretation Data Quality Control Analytical Results Do the analytical results correspond with the core images and geophysical logs? 1. Thorough Evaluation of the Analytical Data 2. Direct Comparison of Analytical Data with Core Images 3. Compare an Image Grade Calculation against the Original Analytical Data Data Controls: 1. Resulting Analytical Data Remained Fixed 2. Any material sampled could not be modified or removed.

20 Data Modification/Re-Interpretation Original Data: (Direct Comparison of Analytical Data with the Core Images)

21 Data Modification/Re-Interpretation Original Data: (Direct Comparison of Analytical Data with the Core Images) Original Data: How does this data compare with the log response?

22 Data Modification/Re-Interpretation Original Core Images: (Direct Comparison of Analytical Data with the Core Images) Flipped Core Box Modified Core Images: Change the orientation of the core to better match the resulting data.

23 Data Modification/Re-Interpretation Original Analytical Data: Bitumen Saturation Calculated Image Grade Data: Bitumen Saturation Direct Comparison of Original Saturation Data vs. Calculated Image Grade Data

24 Data Modification/Re-Interpretation Geological Interpretation 1. Is there relevant data missing from the original interpretation? 2. Is there other information I can add to the overall geological interpretation?

25 Data Modification/Re-Interpretation Geological Interpretation Complete Package 1. Facies/Lithological data 2. Sedimentary Structures/Rock Accessories/Trace Fossils 3. Image Grade Interpretation 4. Geotechnical Flags 5. Indurations 6. Geological Descriptions

26 Final Products of Re-Interpretation/Re-Evaluation

27 Final Products of Re-Interpretation/Re-Evaluation Revised Lab Report: 1AA W401 UWI TOP BOTTOM Plug Number Bulk Mass Oil Ratio Bulk Mass Water Ratio Bulk Mass Sand Ratio Litho-facies 1AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD AA W FD

28 Final Products of Re-Interpretation/Re-Evaluation

29 Digital Core Well Files Digitally Accessible Well Logs Data Sets

30 Digital Core Databases In Summary: 1. Provided the Client with Digitally Accessible Data 2. Integrated Different Types of Data into a Usable Format 3. Re-Interpreted and Re-Evaluated the Data 4. Added Additional Information to Provide More Detail 5. Provided Additional Output Data for External Use

31 Digital Core Databases Acknowledgements: Loring Tarcore Labs Ltd Inc. Syncrude Canada Calgary Geoscience Data Managers Society