Date of Award

12-2016

Degree Type

Thesis

Degree Name

Master of Science - Geology

Department

College of Science and Mathematics

First Advisor

Dr. Wesley A. Brown

Second Advisor

Dr. R. LaRell Nielson

Third Advisor

Dr. Kevin W. Stafford

Fourth Advisor

Dr. Walter L. Trikosko

Abstract

The western Terrebonne Parish area in South Louisiana contains various amounts of geologic features and processes. Slumping, growth faulting, anticlines, and salt tectonics are only a few that are present here. One of the largest oil and gas discoveries during the 1990’s in South Louisiana was the Etouffee Prospect. Located south of Kent Bayou Field in Terrebonne Parish, the Etouffee Prospect developed estimated reserves of about 250 BCFE. Newly acquired 3D seismic data of the area developed in the 1990’s helped identify this prospect. The survey was one of the first to fully explore and provide deeper imagery of the onshore of South Louisiana.

This thesis provides an explanation and interpretation on how the Etouffee and other sand horizons formed. Along with this, various maps were produced to illustrate thicknesses of multiple sand horizons and the overall structure of the area. Both isopach and structure maps, were developed in Petra software. When comparing the Etouffee Sands to the other sands in the area, the final results of these maps showed a significant change in thickness and depth. Correlating well logs throughout the area further helped the interpretation and understanding of the depositional environments in which these sands were deposited in. These correlations were done in Petra software and showed the locations of several faults that were present. The well logs around the Etouffee Sands produced higher gamma ray, resistivity, and neutron density measurements than the other logs in the data set. Using 3D Kingdom software, horizons and faults were picked and interpreted. Some of these horizons include the Textularia L (Tex L) and Robulus L (Rob L) sands. Interpreting these horizons helped understand not only the structure of the area, but to see how the horizons develop and change across the region. The biggest faults and most developed horizons were identified around the Etouffee Sands area, including the Etouffee Fault. Multiple paleontological reports were retrieved displaying the paleobathymetry of the different foraminferal biostratigraphic units in the area. These reports helped in determining the paleoenvironment of the foraminfera associated with the Rob L unit. The WesternGeco division of Schlumberger licensed the 3D seismic data of the area for this study, which allowed for mapping and analysis of the sand horizons.

Share

COinS

Tell us how this article helped you.

 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.