Method of locating oil and gas exploration prospects by data visualization and organization
View Patent ↗The present invention relates to a method of locating oil and gas exploration prospects. A digital model of each of the many geologic strata that compose a basin is created for all or a portion of a basin by digitizing well log data 100 , collecting all digitized well log data in a data base, marking common geological time markers throughout the entire basin and visually displaying the basin in a number of useful views 380, 580 to permit the isolation or identification of oil and gas producing geological formations. This allows for the generation of oil and gas drilling prospects 600 through the extrapolation of productive depositional features into un-drilled portions of the basin. The present invention expedites these processes and allows the available well log data to be viewed in ways not previously possible thereby greatly enabling oil and gas exploration and development in a basin.
1. A method of locating oil and gas drilling prospects comprising:
normalizing digitized well log data;
correlating the normalized digitized well log data to an identified geographic basin map to create a stratigraphic framework for an entire basin; and
marking observable depositional features for each well using a standardized scale.
2. The method of claim 1 further comprising visually displaying a plurality of individual well logs to indicate consistent depositional characteristics of the basin.
3. The method of claim 1 further comprising visually displaying a plurality of individual well logs to show consistent depositional characteristics of a cross-sectional area of the basin.
4. The method of claim 1 wherein the correlation is manual.
5. The method of claim 1 wherein the correlation is automated.
6. The method of claim 1 wherein the normalized digital well log data are amplified or demodulated to show additional well information.
7. The method of claim 1 further comprising digitizing well log data to create the digitized well log data.
8. The method of claim 1 further comprising calibrating the digital well log data prior to the normalization.
9. The method of claim 8 further comprising saving the calibrated digital well log data as an LAS file.
10. The method of claim 9 further comprising inventorying well log data prior to the digitizing.
11. A method of locating oil and gas drilling prospects comprising:
scanning a plurality of well logs to create raster images;
digitizing the raster images to create digitized well log data;
normalizing the digitized well log data to remove outlier data or noise from a data recording process;
correlating the normalized digitized well log data to identify key hang markers in each depositional stratum;
scaling the normalized digitized well log data to emphasize hang markers across multiple well logs;
extracting formation tops to create visual display of formation surface;
adjusting non-conforming stratigraphic features to adjust formation surface mapping for visual display; and
utilizing intersect surfaces of non-conformity surface with formation surface to create a truncation line for overlay on a visual display of stratigraphic maps.
12. The method of claim 11 further comprising calibrating the digital well log data to a common scale prior to the normalization.
13. The method of claim 11 further comprising selecting the well logs for the scanning based on areas of interest in a basin.
14. The method of claim 11 wherein the normalized digital well log data are amplified or demodulated to show additional well information.
15. The method of claim 11 wherein the correlation is manual.
16. The method of claim 11 wherein the correlation is automated.
17. The method of claim 11 wherein the digital well log data and normalized digital well log data are stored in a database.
18. The method of claim 11 further comprising calculating net sand data from normalized digital well log data using an iterative calculation process.
19. The method of claim 11 further comprising calculating facies data from normalized digital well log data.
20. The method of claim 18 further comprising calculating facies data from normalized digital well log data.
21. The method of claim 20 further comprising generating a basin-wide sequence depositional features model from the facies data and net sand data.
22. The method of claim 21 further comprising generating basin-wide prospect/play maps for a reservoir from the basin-wide depositional features model and basin-wide hydrocarbon production data.
23. The method of claim 22 further comprising identifying suspected hydrocarbon bearing formations from the prospect/play maps.
24. The method of claim 23 further comprising drilling a well into a suspected hydrocarbon bearing formation identified in the prospect/play maps.