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Interpretation of a Seismic Reflection Survey and Geophysical Well Logs in Jay County, Indiana: Orientation and Composition of a Carbonate Layer Below the Mount Simon Sandstone

Alam, Md. Saiful
http://rave.ohiolink.edu/etdc/view?acc_num=wright1527270033592632

Abstract Details

2018, Master of Science (MS), Wright State University, Earth and Environmental Sciences.
In August 2017, a dynamite-sourced 2D seismic reflection survey was conducted along a gravel road northwest of Portland, Indiana. The main focus of the survey was to determine the orientation of a lithologic unit previously identified by Welder (2014) on a similar 2D seismic reflection survey in the same area. Drillers logs of two wells within this area identified a limestone layer below the Mt. Simon Sandstone, and a similar limestone layer was identified in a well drilled in Clark County, Ohio. As the focus of this study, this limestone layer will be informally named the `Votaw limestone’. The seismic line studied by Welder (2014) was oriented west-east; the seismic line utilized in this study is oriented north-south and crosses the previous one. Together, these seismic lines allow the true orientation of the Votaw limestone to be determined. Geophysical logs from nearby wells and two distant ones (north central Indiana and western Ohio) were used to produce synthetic seismograms which together with drillers logs were used identify the top of Eden, Trenton, Knox, Eau Claire, Mt. Simon, and Middle Run formations. The top of the Votaw limestone was associated with a reflection in the seismic data using the synthetics and the driller's logs for the nearby wells. Importantly, where the Middle Run Formation exists, the Votaw limestone occurs below the top of the Middle Run. The Votaw limestone is horizontal in both north-south and west-east seismic lines, confirming that it is truly horizontal in this area. This limestone could be present beneath the Middle Run in Warren County, Ohio, based on similar seismic characteristics of reflectors. The pre-stack CDP’s were used to analyze the Amplitude Variation with Offset (AVO) response of the limestone layer. The limestone reflector primarily exhibited a negative gradient with some variations suggesting an impurity of the limestone. The limestone reflector in the area is parallel to the overlying Paleozoic reflectors suggesting the lack of any Grenville deformation. For all these reasons, the site could be a prime candidate for drilling and coring of the entire lithologic sequence beneath the Mt. Simon Sandstone.
Ernest Hauser, Ph.D. (Advisor)
Doyle Watts, Ph.D. (Committee Member)
David Dominic, Ph.D. (Committee Member)
84 p.
Geology; Geophysics
seismic reflection survey; well log; Mt Simon Sandstone; Votaw limestone

Recommended Citations

Citations

  • Alam, M. S. (2018). Interpretation of a Seismic Reflection Survey and Geophysical Well Logs in Jay County, Indiana: Orientation and Composition of a Carbonate Layer Below the Mount Simon Sandstone [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527270033592632

    APA Style (7th edition)

  • Alam, Md. Saiful. Interpretation of a Seismic Reflection Survey and Geophysical Well Logs in Jay County, Indiana: Orientation and Composition of a Carbonate Layer Below the Mount Simon Sandstone . 2018. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1527270033592632.

    MLA Style (8th edition)

  • Alam, Md. Saiful. "Interpretation of a Seismic Reflection Survey and Geophysical Well Logs in Jay County, Indiana: Orientation and Composition of a Carbonate Layer Below the Mount Simon Sandstone ." Master's thesis, Wright State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527270033592632

    Chicago Manual of Style (17th edition)

wright1527270033592632
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This open access ETD is published by Wright State University and OhioLINK.