Depositional and diagenetic controls on reservoir rock development and petrophysics in Silurian tidalites, Interlake Formation, Cabin Creek Field area, Montana

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Authors:Roehl, Perry O.
Author Affiliations:Primary:
Trinity Univ., Dep. Geol., San Antonio, TX, United States
Other:
Marathon Oil Co., United States
Volume Title:Carbonate petroleum reservoirs
Volume Authors:Roehl, Perry O., editor; Ginsburg, R. N., editor; Choquette, Philip W.
Source:Carbonate petroleum reservoirs, edited by Perry O. Roehl and Philip W. Choquette, p.85-105. Publisher: Springer-Verlag, New York, NY, United States. ISBN: 0-387-96012-0
Publication Date:1985
Note:In English. 9 refs.; illus. incl. sect., sketch maps
Summary:The subsurface of Montana, the Dakotas, and the Canadian portion of the Williston basin contains numerous oil reservoirs developed in dolomitized tidalites of Ordovician and Silurian age. Porosity and permeability development in these rocks depends on: 1) initial environment of deposition (including climatic effect) and 2) diagenesis, especially that related to sabkha interludes and associated dolomitization. The control of reservoir development within the constraints imposed by these depositional and diagenetic features is governed by capillarity and by formation fluid properties. A conceptual model portrays: 1) an underlying subtidal and intertidal facies typified by the Stony Mountain formation (Ordovician). This lower facies is composed of mud-dominant, bioturbated carbonates directly overlying a dark, illitic shale-rich, fossiliferous member, the so-called Stony Mountain shale; both of these units are now dolomite; 2) these tidalites pass upward into supratidal deposits of diverse sedimentary fabrics and early post-depositional modifications, including sub-aerial diagenesis and dolomitization. These modified intertidal and supratidal deposits characterize the Interlake formation of Silurian age. [J.M.H.]
Subjects:Carbonate rocks; Controls; Diagenesis; Economic geology; Interlake Formation; Llandovery; Lower Silurian; Paleozoic; Petroleum; Pressure; Reservoir rocks; Sedimentary rocks; Sedimentation; Silurian; Tidalite; Fallon County Montana; Montana; United States; Cabin Creek Field
Abstract Numbers:87M/1629
Record ID:1986002355
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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001 1986002355
003 ViAlAGI
005 20190221164916.0
008 190110s1985 nyua 0 0 eng d
040 |a ViAlAGI  |c ViAlAGI 
072 7 |a 29A  |2 georeft 
100 1 |a Roehl, Perry O.  |e analytic author  |u Trinity Univ., Dep. Geol., San Antonio, TX 
245 1 0 |a Depositional and diagenetic controls on reservoir rock development and petrophysics in Silurian tidalites, Interlake Formation, Cabin Creek Field area, Montana 
300 |a p. 85-105 
500 |a In English. 9 refs. 
500 |a Abstract number: 87M/1629 
500 |a Abstractor: J.M.H. 
500 |a Affiliation: Trinity Univ., Dep. Geol.; San Antonio, TX; USA; United States 
500 |a Affiliation: Marathon Oil Co.; ; USA; United States 
500 |a Source note: Carbonate petroleum reservoirs, edited by Perry O. Roehl and Philip W. Choquette, p.85-105. Publisher: Springer-Verlag, New York, NY, United States. ISBN: 0-387-96012-0 
500 |a Publication type: monograph 
504 |b 9 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a The subsurface of Montana, the Dakotas, and the Canadian portion of the Williston basin contains numerous oil reservoirs developed in dolomitized tidalites of Ordovician and Silurian age. Porosity and permeability development in these rocks depends on: 1) initial environment of deposition (including climatic effect) and 2) diagenesis, especially that related to sabkha interludes and associated dolomitization. The control of reservoir development within the constraints imposed by these depositional and diagenetic features is governed by capillarity and by formation fluid properties. A conceptual model portrays: 1) an underlying subtidal and intertidal facies typified by the Stony Mountain formation (Ordovician). This lower facies is composed of mud-dominant, bioturbated carbonates directly overlying a dark, illitic shale-rich, fossiliferous member, the so-called Stony Mountain shale; both of these units are now dolomite; 2) these tidalites pass upward into supratidal deposits of diverse sedimentary fabrics and early post-depositional modifications, including sub-aerial diagenesis and dolomitization. These modified intertidal and supratidal deposits characterize the Interlake formation of Silurian age. 
650 7 |a Carbonate rocks  |2 georeft 
650 7 |a Controls  |2 georeft 
650 7 |a Diagenesis  |2 georeft 
650 7 |a Economic geology  |2 georeft 
650 7 |a Interlake Formation  |2 georeft 
650 7 |a Llandovery  |2 georeft 
650 7 |a Lower Silurian  |2 georeft 
650 7 |a Paleozoic  |2 georeft 
650 7 |a Petroleum  |2 georeft 
650 7 |a Pressure  |2 georeft 
650 7 |a Reservoir rocks  |2 georeft 
650 7 |a Sedimentary rocks  |2 georeft 
650 7 |a Sedimentation  |2 georeft 
650 7 |a Silurian  |2 georeft 
650 7 |a Tidalite  |2 georeft 
651 7 |a Fallon County Montana  |2 georeft 
651 7 |a Montana  |2 georeft 
651 7 |a United States  |2 georeft 
653 |a Cabin Creek Field 
700 1 |a Choquette, Philip W.,  |e monographic editor 
773 0 |a Roehl, Perry O., editor 
773 0 |a Ginsburg, R. N., editor  |t Carbonate petroleum reservoirs  |d New York, NY : Springer-Verlag, 1985  |n Carbonate petroleum reservoirs, edited by Perry O. Roehl and Philip W. Choquette, p.85-105. Publisher: Springer-Verlag, New York, NY, United States. ISBN: 0-387-96012-0 Publication type: monograph  |h illus. incl. sect., sketch maps  |z 0387960120