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Evaluating Depositional Complexity and Compartmentalization of the Rose Run Sandstone (Upper Cambrian) in Eastern Ohio

Shah, Mihir P
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1383571840

Abstract Details

2013, Master of Science (MS), Bowling Green State University, Geology.
The Upper Cambrian Rose Run Sandstone in eastern Ohio includes mixed siliciclastic and carbonate lithofacies, deposited in a shallow marine, tidally- influenced, environment. A study of 17 wells including 4 cores with total thickness of 21 m, from Holmes County (well# 2892), Coshocton County (wells# 2989 and # 3385), and Morgan County (well# 2923) reveals 14 siliciclastic and 5 carbonate lithofacies. Intertidal deposits include heterolithic wavy bedded sandstone and mudstone (lithofacies SMw), heterolithic lenticular bedded sandstone and mudstone (lithofacies SMk), heterolithic flaser bedded sandstone and mudstone (lithofacies SMf), interbedded planar laminated sandstone and mudstone (lithofacies SMl), interpreted as tidalites, massive mottled sandstone (lithofacies Smm), and massive mudstone (lithofacies Mm). Subtidal clastic deposits include medium-scale planar tabular cross-bedded sandstone (lithofacies Sp), herringbone cross-bedded sandstone (lithofacies Sx), massive sandstone (lithofacies Sm), glauconite-rich massive sandstones (lithofacies Smg), hummocky stratified sandstone (lithofacies Sh), and laminated mudstone (lithofacies Ml). Interbedded carbonates include dolo-mudstones (lithofacies Cm), bioturbated and mottled dolo-mudstones (lithofacies Cmm), dolo-packstones with rip-up clasts ("flat-pebble conglomerate") (lithofacies Cpmr), dolo-packstones with mud drapes ("cryptalgal lamination") (lithofacies Cpl), and convoluted bedded dolo-mudstone (lithofacies Cmmc). The Rose Run Sandstone in this region is interpreted to be deposited in a shallow marine environment of normal salinity with extensive tidal flats, mixed siliciclastic-carbonate deposition, strong tidal influence, and reworking of carbonate materials. This study reveals compartmentalization of Rose Run Sandstone at different scales. The reservoir quality is mainly controlled by amount of dolomite cement, quartz and feldspar overgrowths, and clay content, which influences porosity and possibly permeability. Interlaminated clay/mud baffles are common small-scale features. Textural and mineralogical variability caused by different grain size may influence reservoir quality. Interbedded dolostone vary in thickness from 20 cm to around 1.5 m, act as baffles to fluid flow in all directions, and create fluid flow compartments preventing effective pore fluid interconnectivity between sandstone units. Core and geophysical log analysis from 17 wells suggests depositional complexity as one of major reasons for compartmentalization of Rose Run Sandstone in the study area. The unit is better developed in eastern part of study area from where its thickness reduces in all other directions. Also, there is better connectivity among sand bodies in north-south direction, which is interpreted to be approximately parallel or sub-parallel to the paleo-shoreline. Together, structure contour and sand-isolith maps reveals up-dip stratigraphic traps in the study area and in areas with better well control, the structure contour map shows local structural complexity in the form of isolated anticlinal features which at places are interpreted as pre-depositional highs.
James Evans, PhD (Advisor)
Charles Onasch, PhD (Committee Member)
Jeffery Snyder, PhD (Committee Member)
148 p.
Geology
Rose Run Sandstone; Reservoir compartmentalization; Depositional complexity; Tidal environment; Peritidal environment

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Citations

  • Shah, M. P. (2013). Evaluating Depositional Complexity and Compartmentalization of the Rose Run Sandstone (Upper Cambrian) in Eastern Ohio [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1383571840

    APA Style (7th edition)

  • Shah, Mihir. Evaluating Depositional Complexity and Compartmentalization of the Rose Run Sandstone (Upper Cambrian) in Eastern Ohio. 2013. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1383571840.

    MLA Style (8th edition)

  • Shah, Mihir. "Evaluating Depositional Complexity and Compartmentalization of the Rose Run Sandstone (Upper Cambrian) in Eastern Ohio." Master's thesis, Bowling Green State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1383571840

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Bowling Green State University and OhioLINK.