subsurface geology and coal resources of the pennsylvanian system ...

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94 ILLINOIS BASIN COAL RESOURCES large quantities of coal. Probably damage to the coal beds will result from penetration of the beds by numerous drill holes, particularly where closely spaced in producing oil pools. Additional loss is inevitable from the mining processes. It seems probable that the actual amount of recoverable coal from these beds cannot be more than half the amount given above, or 1500 million tons. Some of the other coal beds, includiiig "No. 7," "No. 4," "No. 2," the Dekoven, Curlew, and possibly others higher or lower in the section, may be of workable thickness in areas large enough to support mining operations in Gallatin County. However, only additional exploration can provide the data necessary far evaluation of these possible reserves. PROTECTION OF COAL BEDS Workable beds of coal were originally defined in the Rules and Regulations of the Oil, Gas, and Coal Conservation Act (effective July 29, 1911 ) as beds 30 inches or more thick at a depth of 1000 feet o,r less, and 36 inches or more thick at a depth of more than 1000 feet. This order has been modified to limit workable beds to a thickness of 30 inches at or above 1000 feet.31 Three beds need protection in this area: No. 6, No. 5, and the Davis. No drill hole should be abandoned in this county unless provision is made fo,r the protection of these coal beds. With the aid of the structure contour map, showing the altitude of No. 6 coal bed above sea level, the depth to this bed can be calculated from the surface altitude. The average intervals between No. 6 bed and No. 5, and No. 6 bed and the Davis coal bed, for the various townships in the area mapped, appear in table 8. In general, No. 6 and No. 5 beds are separated by about 100 to 110 feet of strata. To protect these beds, a cement 31 Oil, Gas. and Coal Conservation Act-Rules and Regulations, Rule 11. p. 12: Illinois Dept. Mines and Minerals, Division of Oil and Gas Conservation, October IS, 1945 (mimeographed). plug should extend from 50 feet above to 150 feet below No. 6 coal bed. To protect the Davis bed, a cement plug should extend for 100 feet from about 290 feet below No. 6 bed in T. 7 S., and about 315 feet beloiv No. 6 bed in T. 8 S. Such a plug should give satisfactory protection for both the Dekoven and the Davis beds. Placing o,f plugs at the positions indicated will provide protection for the three beds of special importance in the area. Hornever, this procedure does not release the operator f ro,m the obligation of protecting other beds which adjacent diamond drilling or careful logging of any rotary-drill holes indicate are of workable thickness. The present report, particular1.y the cross-sections, graphic logs, and tabulations, shows the positions where coal beds are likely to be penetrated. Care should be exercised in drilling at these positions so that unusual thicknesses of coal beds that are generally thin may be reported. OIL AND GAS RESOURCES Structure of the No. 6 coal bed has a close similarity to the structure of the upper and middle Mississippian beds which contain the o'il and gas produced in Gallatin County. Where these accumulations are related to structural features of the producing strata, the structure of No. 6 coal provides a fairly accurate picture of the structure of the reservoir formations. However, this constitutes a post fnctum relationship which is established a-fter the pools have been discovered. The relationship everthe he less is important because it indicates the value of shallow structure testing to key beds such as No. 6 coal bed. The structure map of the No. 6 coal bed presents the structural features in sufficient detail to meet the primary objectives of this study. However, a contour interval of 25 feet is probably too large to delineate the smaller structural irregularities that seem to determine positions of some of the oil pools in Gallatin County.
GALLATIN COUNTY Pennsylvanian Chester Series (Upper Mississippian) Tradewater Degonia Clore Palestine Walters burg Tar Springs Paint Creek Bethel Aux Vases Murray Bluff sandstone Degonia sands tone Clore sandstone Palestine sandstone Walters burg sands tone Tar Springs sandstone Hardinsburg sands tone Cypress sandstone Paint Creek sandstone Bethel sandstone Aux Vases sandstone Inman East Inman East Inman East Jnman Omaha Jnman Roland Inman East Inman West New Haven West Omaha Roland Inman East Inman East Jnman West Roland Ro!and Roland Inman Inman North Roland Iowa Series Ste. Genevieve Rosiclare sandstone Inman 3,005 (Lower Missis- (Rosiclare sippian) member) Ste. Genevieve "McClosky" lime Inman 2,730 (Fredonia Inman East 2,740 member) Inman West Inman North 2,875 2,870 Roland 3,155 32 Oil and Gas Drilling Report, Illinois Geol. Survey, 103, pp. b-11, May 1945.
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SUBSURFACE GEOLOGY AND COAL RESOURC
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ORGANIZATION STATE OF ILLINOIS HON.
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CONTENTS INTRODUCTION BY GILBERT H
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PAGE Structure of Herrin (No. 6) co
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SUBSURFACE GEOLOGY AND COAL RESOURC
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oi the strata below the lower bench
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INTRODUCTION 13 less than 1000 feet
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INTRODUCTION 15 Grateful acknowledg
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INTRODUCTION TABLE 2.-CONTROL DRILL
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INTRODUCTION i I County Sec. T. R.
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Cumberland County 585 725 731 1130
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Jasper County Siltstone 11 ; black
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Sangamon County Wabash County 467 "
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28 ILLINOIS BASIN COAL RESO UKCES t
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30 ILLINOIS BASIN COAL RESOURCES 1
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32 ILLINOIS BASIAT COAL RESOURCES t
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34 ILLINOIS BASIN C09L RESOURCES la
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36 ILLINOIS BASIN COAL RESOURCES gr
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3 5 ILLINOIS BASIN COAL RESOURCES 1
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40 ILLINOIS BASIN COAL RESOURCES be
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42 ILLINOIS BASIAT COAL RESOURCES W
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Page 50 and 51: ILLINOIS BASIN COAL RESOURCES TABLE
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Page 58 and 59: TABLE 6.-INTERVALS BETWEEN TOP OF N
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Page 98 and 99: SUBSURFACE GEOLOGY OF HAMILTON COUN
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Page 120 and 121: GULF REFINIXG COMPA:
Page 122 and 123: ILLINOIS BASIN COAL RESOURCES Count
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Page 126 and 127: __!L APPENDIX OF TABULATED DATA Abb
Page 128 and 129: Total depth: The total depth of the
Page 130 and 131: , -- .- -- ----- - -- I---]=- Locat
Page 132 and 133: Location of Hole I Twp. 1 Range / S
Page 134 and 135: Location of Hole TABULATED DATA ON
Page 136 and 137: t TABULATED DATA ON KEY BEDS CLAY C
Page 138 and 139: TABULATED DATA ON KEY BEDS CLAY COU
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Page 142 and 143: Location of Hole I County Number --
Page 144 and 145: Location of Hole I Twp. 1 Range Sec
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- -- -- - -- *- - -- -- - -. Locati
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Location of Hole TABULATED DATA ON
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Location of Hole I Twp. Range 1 Sec
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Location of Hole County Number TABU
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TABULATED DATA ON KEY BEDS CLAY COU
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TW~. I Location of Hole -- Range SI
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Location of Hole County Number TY p
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Location of Hole I== TABULATED DATA
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Twp. 1 iiange 1 Sec. TABULATED DATA
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Twp. -- 1N 1N 1N Location of Hole R
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-- TABULATED DATA ON KEY BEDS Locat
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TABULATED DATA ON KEY BEDS EDWARDS
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Location of Hole Twp. Range Sec. Nu
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TABULATED DATA ON KEY BEDS EDWARDS
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Location of Hole I I Twp. Range Sec
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' Location of Hole Twp. Range Sec.
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Location I of I Hole - - -- Twp. Ra
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PENNSYLVANIAN SYSTEM IN ILLINOIS BA
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-- TABULATED DATA ON KEY BEDS -- GA
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TABULATED DATA ON KEY BEDS GALLATIN
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TABULATED DATA ON KEY BEDS I GALLAT
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Location of Hole I L p . Range iec.
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- Twp. Location o Hole Rang< Sec. /
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Location of Hole 1 1 1 Twp. Range S
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-- Location of Hole I F Twp. I Rang
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Twp. Location of Hole I Range Sec.
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TABULATED DATA ON KEY BEDS Location
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Twp. 3 8 Location of Hole TABULATED
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Twp. I TABULATED DATA ON KEY BEDS 0
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TABULATED DATA ON KEY BEDS 10 HAMIL
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Location of Hole I Twp. 1 Range 1 S
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TABULATED DATA ON KEY BEDS HAMILTON
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SYLVANlAM SYSBE A. - - 'aw ek m~c r
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TABULATED DATA ON KEY BEDS HAMILTON
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p-p-ppppp - -- Location of Hole I r
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Location of Hole Twp. Range Sec. TA
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--- -- -- -- - Location of Hole . -
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IAN SYSTEM IN ILLINOiS BASIN
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PENNSYLVANIAN SYSTEM IN lLLlNOlS BA
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I- PENNSYLVANIAN SYSTEM IN ILLINOIS
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1 TIP. Range Sec. . -.-- -- TABULAT
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-f- T I Q Be Q ~n rm O\ - 3 ~ o m+
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NSYLVANIAN SYSTEM IN ILLINOIS BASIN
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2N 2H 1 county TABULATED DATA ON KE
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TABULATED DATA ON KEY BEDS RICHLAND
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Location of Hole Twp. Range Sec. TY
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PENNSYLVANIAN SYSTEM IN ILLlNOlS BA
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Location of Hole - TABULATED DATA O
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'n, (U - ;I Y .- I- L - (U -0 - 2:
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TABULATED DATA ON KEY BEDS Location
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SYSTEM IN /LLINOIS BAS/ - ma now- e
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- - Location I I of Hole TXP. Range
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-. - - --- - - - -- County Number T
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RICHLAND COUNTY 0 9 ot- OV) urn - -
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TABULATED Location of Hole 1 Type I
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