Home > Free Essays > Sciences > Geology > Lithology Logs and the Spontaneous Potential Method
Rate

Lithology Logs and the Spontaneous Potential Method Essay

Exclusively available on IvyPanda Available only on IvyPanda
Updated: Dec 19th, 2020

The spontaneous potential method is one of the oldest ways of recording rock formation properties. It utilizes small electric potentials between the surfaces of the borehole and the electrode (Glover). The differences between the electronic potentials on the surface of different formations caused by the presence of pores and permeable beds allow determining different layers based on spontaneous potential and resistivity of the fluids. This practice report will provide the analysis of the lithology logs made using the spontaneous potential method.

Measurements used in this report were taken by the company UNOCAL, Offshore county, Louisiana state. Coordinates and characteristics are as follows: latitude: 28o16’13.7906’’, longitude: 91o19’6.6031’’, well OCS-G-21116 No. 2 ST-1, ship shoal block 295. Elevation: DF=107 feet, GL=-245 feet. Date of excavation and measurement: 14 March 2000. The type of fluid used at the excavation site was Ecoflow 200.

According to the charts of spontaneous potential and resistivity received from the site, different layers and openings present the lithological formation. The area between 9000 and 9100 is permeable sand and saltwater, followed by what looks to be permeable sand with fresh water. Layers of permeable sand, freshwater, and impermeable shale continue up to the 9500 marks, after which there is a large chasm with saltwater. It returns to impermeable shale after the 9600 marks.

As it is possible to see, the distances between the spikes are frequent and high. The example charts represent a much more stable shale-permeable bed pattern. It could be concluded that the number of layers and beds filled with sand and water is very high. Either the ground at the location of the excavation is extremely unstable, or there is something in the clay that affects the results of the research.

Works Cited

Glover, Paul. “The University of Leeds. Web.

This essay on Lithology Logs and the Spontaneous Potential Method was written and submitted by your fellow student. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly.
Removal Request
If you are the copyright owner of this paper and no longer wish to have your work published on IvyPanda.
Request the removal

Need a custom Essay sample written from scratch by
professional specifically for you?

Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar
Writer online avatar

certified writers online

Cite This paper
Select a referencing style:

Reference

IvyPanda. (2020, December 19). Lithology Logs and the Spontaneous Potential Method. Retrieved from https://ivypanda.com/essays/lithology-logs-and-the-spontaneous-potential-method/

Work Cited

"Lithology Logs and the Spontaneous Potential Method." IvyPanda, 19 Dec. 2020, ivypanda.com/essays/lithology-logs-and-the-spontaneous-potential-method/.

1. IvyPanda. "Lithology Logs and the Spontaneous Potential Method." December 19, 2020. https://ivypanda.com/essays/lithology-logs-and-the-spontaneous-potential-method/.


Bibliography


IvyPanda. "Lithology Logs and the Spontaneous Potential Method." December 19, 2020. https://ivypanda.com/essays/lithology-logs-and-the-spontaneous-potential-method/.

References

IvyPanda. 2020. "Lithology Logs and the Spontaneous Potential Method." December 19, 2020. https://ivypanda.com/essays/lithology-logs-and-the-spontaneous-potential-method/.

References

IvyPanda. (2020) 'Lithology Logs and the Spontaneous Potential Method'. 19 December.

More related papers
Psst... Stuck with your
assignment? 😱
Hellen
Online
Psst... Stuck with your assignment? 😱
Do you need an essay to be done?
What type of assignment 📝 do you need?
How many pages (words) do you need? Let's see if we can help you!