The purpose of this exercise is to enable you to:
The illustrative data to be used for the exercise have been saved either in .pdf, .gif and/or .jpg format. These maps and cross-sections can be viewed on electronic media that include PC, Notebook, Tablet, or Pad and interpreted with a variety of different visualization software (including but not exclusive of Adobe Acrobat, Adobe Illustrator, Freehand, Canvas, Photoshop and/or Power Point) or printed on a large frame plotter and interpreted by hand. These exercise illustrations are quite large (up to 500K in some cases) and they may take a little time to be displayed. Patience will be rewarded!!!!
The clickable map below is linked to a pdf file which locates the five wells (me333, me296, me428, me313 and me 486) within the central portion of the Northern Strike Line
- Correlate wells using Spontaneous Potential and Resistivity well logs and a greater vertical spread of the La Pascua Section than in Exercises 1, 2 and 3.
- Subdivide the sedimentary section characterized by the well logs on the basis of the prominent correlatable surfaces (TS, mfs and SB) you can identify.
- Using these surfaces identify the parasequences within the sedimentary section characterized by the well logs and interpret the history of their evolving depositional settings.
- Describe the role of relative sea level in forming the resulting depositional settings utilizing the report on the geologic setting of the La Pascua Formation, the introduction to the sequence stratigraphy of the La Pascua Formation and the eustatic chart.
As an alternative this map can also be viewed by clicking on the link to a large .jpg file
Use the Spontaneous Potential and Resistivity logs displayed on the .pdf file of the cross section 5 wells Guarico linked to the clickable thumbnial.
As an alternative the above .pdf file this cross section can also be viewed by clicking on the link to a large .gif file
You can also view and/or print a smaller version of these files by using your vizualization software to shrink the images to fit your printer.
A report describing the high-frequency (fourth-order cycles) sequence stratigraphy and regional geology of this region is provided in the geologic setting of the La Pascua Formation, the introduction to the sequence stratigraphy of the La Pascua Formation and the eustatic chart.
A set of maps of previously interpreted wells is also provided to enable the construction of sand thickness isopachs for each of the intervals. Please refer to the basemap for the location of all the wells.
Utilize the Gulf Coast slip-slide method to help you match the log sections and identify the same geologic events on the various wells.
- Provide an overall analysis that describes your conclusions.
As with the earlier three exercises (Exercise 1, Exercise 2 and Exercise 3) to help with your interpretation of the well logs you should both view the movies and read the earlier sections related to the geologic setting of the La Pascua Formation and the introduction to the Sequence Stratigraphy of the La Pascua Formation. From these you will gain knowledge of the depositional setting of these rocks. You should combine the techniques outlined above with your understanding of the regional geology and the vertical and lateral facies relationships in near shore clastic settings (eg. shoreline, beach, stacked beaches, tidal flats, deltas) and Walther's Law. You should use these to build a depositional model and a sequence stratigraphic interpretation of the well log section.
Tuesday, October 08, 2013