s 14. GS: *CIR A<\Z- c A (^L(J( ^aQjOUA STATE OF ILLINOIS WILLIAM G. STRATTON, Governor DEPARTMENT OF REGISTRATION AND EDUCATION VERA M. BINKS, Director GLACIAL-DRIFT GAS IN ILLINOIS Wayne F. Meents DIVISION OF THE ILLINOIS STATE GEOLOGICAL SURVEY JOHN C. FRYE, Chief URBANA CIRCULAR 292 1960 ILLINOIS STATE GEOLOGICAL SURVEY 3 3051 00004 1339 GLACIAL-DRIFT GAS IN ILLINOIS Wayne F. Meents ABSTRACT Glacial-drift gas in Illinois occurs mainly in the north- east fourth of the state in some 60 areas in 27 counties. There are about 460 producing gas wells of which 250 are flowing pressure wells and the remainder are vaccum pumped. Some 172 pressure wells have been tested for open-flow gas volume and several dozen vacuum-pumped wells have been tested for formation vacuum. More than 200 such gas wells had been abandoned before the testing series began in 1946; many of them were drilled before 1900. Samples of gas have been collected from 216 wells throughout the state for gas gravity measurements or complete Orsat absorption analyses. Methane content of the gases tested ranged from 22.5 to 95.5 percent. Gas volume tested ranged from a few hundred up to 1, 700, 000 cubic feet per day, average being 70,000 cubic feet per day. Formation vacuums range from zero to 14. 5 inches mer- cury, and many of the vacuum-pumped wells flow gas under pressure on days of low atmospheric pressure. Average depth of the glacial-drift gas wells is 132 feet below the surface. Pressures range from near zero to 64 PSI with the majority of the wells between 5 and 20 PSI. The gas is believed to be derived from buried soil zones and from organic matter in deep buried valleys. The glacial end moraines control the accumulation ofdriftgasby providing a cover of glacial till thick enough to prevent escape of the gas. It is estimated that several billion cubic feet of drift gas has been consumed by homes in Illinois since 1900, def- initely placing drift gas in the economic group of natural re- sources. INTRODUCTION Wells producing gas from glacial drift deposits have been observed and samples of gas have been analyzed by the Illinois State Geological Survey as far back as the early 1920 's, but detailed tests of volumes and pressures were not attempted until 1946. As new gas areas were discovered throughout the northern part of the state, many requests were received asking for information as to what [1] ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 292 Fig. 2 - Contour map of buried Sangamonian plain (after Horberg, 1953) GLACIAL-DRIFT GAS IN ILLINOIS Wisconsino ~ v -~ : _ : 2 Sonkoty sond -- -„._^, Nebraskon drift ? • 520 Elevation of top of Sankoty-Mohomet sand Fig. 3 - Areas underlain by Sankoty- Mahomet sand (after Horberg, 1953) ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 292 STAGE SUBSTAGE SECTION THICKNESS AVER MAX MATERIAL ORIGIN WISCONSINAN WOODFORDIAN \ ' o "/• • J^ 1 * 100 300 Till, grovel, sand, silt, loess Sangamon soil p- • >-— + -« - t t •+■ ,. • P rof j '« Vi* *♦* \%t ♦♦♦ ♦ •*'♦ ■ V". \ ' /> i s - V o V.."v- 'i ' v. ILLINOIAN 75 150 5 50 Sankoty (Mahomet) sand Bedrock 5 50 50 75 100 300 0*. a .4. ".■'.». '«"«.'-' •S i c * « « • . . Silt, loess, peot Till, grovel, sond Silt, peat Till, grovel, sond Silt, peat Till, gravel, sond Sond, gravel, silt Glacial moraines, outwosh deposits, wind-blown loess Wind deposits Wind, stream, pond, and swomp deposits Weathered zone Glaciol moroines, outwosh Stream, pond, swomp, ond 1 wind deposits Weathered zone Glocial moroines, outwosh Stream, pond, swomp, and 7 wind deposits Weathered zone Glacial moraines, outwosh Stream deposits, probably outwosh Fig. 4 - Graphic section of Pleistocene deposits in northeastern Illinois (after Horberg, 1953) GLACIAL-DRIFT GAS IN ILLINOIS 7 is referred to as the soil zone. In many areas drift gas is produced directly from the soil zone or from a sand-gravel bed above or below the zone. In a few areas of deeper production, such as areas producing from the Sankoty sand, the source of the gas is either plant material in the sand, or perhaps a coal bed directly below (Meents, 1958). Gas-producing zones in some wells cannot be correlated because of lack of information as to glacial geology or lack of drillers logs on the gas wells in question. The soil zones have been referred to as "forest beds, " and the drillers some- times refer to them as "black soil, " "peat, " "black dirt, " "black drift, " "driftwood, "brush piles, " "woodyard, " "chipyard, " "black muck, " "black mud, " "loam, " or "black clay. " The accumulation of glacial-drift gas in any one area is controlled by the amount of glacial drift above the gas zone, and the amount of glacial drift above is determined by the positions of the glacial end moraines (fig. 1) or valley fills (fig. 3). Area reports discuss the subject in detail. GAS TESTING PROCEDURE The open-flow gas measurements listed in table 1 (p. 34-55) were taken with the orifice well tester on 166 wells, four tests were made with the pitot-tube, and two by the side static pressure method four diameters from the outlet of the flow nipple. The pitot-tube was used on four of the larger wells ranging up to 1,700,000 cubic feet per day. The orifice well tester was used on all clean (free of sand and gravel) flowing gas wells with volumes up to 1,000,000 cubic feet per day. Side static pressure method was used on two wells that were emitting large amounts of sand and gravel. In most of the tests on pressure gas wells, connections were made directly at the well head, but a few flow tests were made by connecting a garden hose to available connections in the farm house basement so that gas flowed out through this arrangement to the orifice tester outside. If connections for flow tests could not be made, pressure gauge readings were taken. In areas of vacuum well pumps (fig. 5) it was useless to test the output side of the pump because the volume depends on the size of the pump and electric motor driving it. Enough gas was pumped for house heating, etc., in all cases. Several formation vacuum tests were made in these areas where connections were available between the vacuum pump and well head. Gas Volumes and Pressures Gas well volumes measured from a few hundred cubic feet per day up to 1,700,000, with an average of 70,000 cubic feet; many of the better wells pro- duced 10, 000 to 20, 000 cubic feet per day. The largest volume of 1, 700, 000 was tested on the Law farm or lot in the NW| NW{ NE{ sec. 16, T. 29 N., R. 6 E., Livingston County. This well flowed a good water spray on testing «nd was flooded out a few weeks after testing. The next larger volume of 1,450, 000 cubic feet per day was obtained on the Reed well in the NE£ NE} SE| sec. 1, T. 11 N., R. 3E., Shelby County. This well was used for furnace heat for eight months, then became partially flooded with water. Shut-in pressures on the better wells are less than 20 PSI, and several good wells had one-fourth to one-half pound. The top pressure measured was 64 PSI on the Young well in the SW± SW£ SE± sec. 27, T. 24 N., R. 6 E., in the Arrowsmith area (fig. 17). This well became flooded immediately. 8 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 292 ROOF OF CELLAR CEILING ETC. JL- — SWIRES TO ELECTRIC C<3r~~^ MOTOR VACUUM PUMP MERCURY/XX/o^^ SWITCH ^ : *>^' RUBBER HOSE CHAIN RUBBER HOSE . FLOAT LIQUID SEAL zr GAS FLOAT IS WEIGHTED TO INCREASE PRESSURE IN SYSTEM GAS HOLDER WATER OR KEROSENE 3' TO 4' IN DIA. WIRES TO MERCURY SWITCH GAS OIL DRIP STAND GAS OIL FILLING CAP / OIL 3" OR 4" PIPE NIPPLE DRAIN PLUG ,TO WELL Fig. 5 - Typical vacuum gas pump installation It is my opinion that most large-volume wells or high-pressure wells (when drilled) will become flooded with water shortly after part of the gas has been with- drawn. The high volume and pressure are due to the water behind or directly below the gas in the formation. Large volumes would be more than 200,000 cubic feet per day, and high pressures would be above 25 PSI. Gas zones in numerous wells are only a few inches thick, according to drillers, but this can not be verified by drill- ing through the gas zone on high-volume "wild" wells because of the danger of fire and flying gravel, including pebbles. In such wells the drill is removed immediately after tapping the gas pay and the well is shut in if possible. The formation vacuum was measured in the vacuum-pumped areas such as Princeton area (fig. 13), Tazewell County and adjacent area (fig. 15), Carlock, Bloomington, and Danvers area (fig. 16), Boynton-Union area (fig. 18), Tiskilwa area (fig. 6; Meents, 1958), and in a few scattered wells. The vacuum ranged from zero to 14.5 inches of mercury. In the Tiskilwa area (fig. 6) 49 wells are vacuum pumped although they will flow under slight pressure on days when atmos- pheric pressure is low (fig. 7). I have arrived at a figure of 3000 cubic feet of gas per day for average farm consumption including the home and a few other build- ings. Several utilities companies are using a gas volume figure of 2000 cubic feet of gas per day for average home use in calculating future supplies for new city sub- divisions. GLACIAL-DRIFT GAS IN ILLINOIS MARSHALL CO MARSHALL CO 4B7 Gos zone elevation -70 Gos gravity, lines of equal gos gravities • Drift gos well; -<>- Dry hole, oil test •■no Surface contour, interval 100 feet Fig. 6 - Drift-gas wells andgas gravities in the Tiskilwa area (Meents, 1958) 10 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 292 t>» JO S3H0NI aanssaad oiai3wo«wa 10 a> o> 5 c in L- id 3 tn T> F U) 01 01 i- -I a ^ u. u 00 31 CD LO u i- rn £ CD JJ ■ 5 C CD CD C a) >, (0 * 01 i- *-> c C 3 -o (-1 n to CD LO CD 3 (0 u. (U 0) ■M & 3 0) (0 OQ p 3 n C * (0 m i — . w X) ■4-» cn in cn (T H Oi n s 2 T an „ a T) en O M-l Hi CO o 0) a [fl ■o u .c i) ■m c ai o pi 6 i o t^ 5 n> u. GLACIAL-DRIFT GAS IN ILLINOIS 11 BASE i'«- THIRO PRINCIPAL MERIDIAN Fig. 8 - Index map showing glacial-drift-gas areas and isolated wells 12 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 292 Gas Gravities and Analyses Gas samples were collected from about 190 glacial-drift gas wells through- out the state. The specific gravity was measured on nearly all samples and com- plete Orsat absorption analysis on 30 (table 2, p. 56-58). Samples from nonpres- sure wells were pumped into the sampling tank, which was usually an evacuated 96 cubic inch steel bottle, and samples from pressure wells were taken by purging gas through the jet valve available on the tank. A few of the early Orsat analyses samples were collected by the water-filled one-gallon or five-gallon bottle method. Gas samples were analyzed by the Illinois Geological Survey's laboratory in Urbana. The specific gravity of the gases was measured by the effusion method, using the U. S. Bureau of Standards type of specific gravity apparatus, which is the comparison of the specific gravity of a gas to the specific gravity of air, air being 1.00 and pure methane being 0.55. The gravities of glacial-drift gas in Illi- nois are governed by the amount of nitrogen versus the amount of methane, other constituents being minor. The more methane present the lighter the gas, and vice versa. The average gravity of the glacial-drift gas in Illinois is 0.66. The purest gas encountered (0.56) was in the Plotner well in the NW{ NE{ NE| sec. 34, T. 18 N., R. 9 E., Champaign County area (fig. 21) and in the Freeland well in the SW| SWi SW| sec. 1, T. 14 N., R. 4 E., Moultrie County. The heaviest and most im- pure burnable gas was sampled in a well in the NW| NW| SE^- sec. 2, T. 14 N., R. 9 E., Putnam County (fig. 6; Meents, 1958), which measured 0.92. The lower grav- ity gases have net Btu values ranging up to nearly 900, whereas the higher gravity gases range as low as 214 (table 2, p. 56-58). Periodic sampling of the same wells R5E R6 E R7E • Flowing gas well 875 Gas zone elevation ~~950 Surface elevation Fig. 9 - Harvard area • Flowing gas well # Abandoned gos well 720 Gas zone elevation c +J -H •h e > M CO 01 M 4-> CT> 0) Q o •H -O M-i 0) •H +> O CO 0) .-( Q. 3 CO O •—t CO O U-, -p o> +> o z 4-1 vO 3 ■« O p s £ ui 3 O U) 4-) vO O W [- *H O +-> to CM 33 c 01 en O C\J u z -p CM O CM O U CD c M0 m X jC CM ■p ( ) UJ a; c (0 "tf c T. ■p U o vO lT) CD vO in r- O oo ro in d 00 d r- o CM d oo d CM o oo d o d o d oo d in o oo vO 00 .—i r-\ -H in o CM 00 o ^r in CM vO CO 00 00 o f- t-H CM r- r~ r~ oo oo 00 ■* 00 t- ^O vO CM co CM •3" co CM O CO ■ o vO oo CM •—1 r- .— i •—< CM CM in ^ 00 o 00 — 1 on .— i oo vO 00 00 00 sO CM 00 o o o CM o o o o o o o 1— 1 ^r o oo 00 o .— H CM 00 •— 1 o r- o CM d 00 CM o vO "tf vO vO CM CM vO O 00 o o o o ^r CM O O O O r- in oo oo CM o o in r- in •-{ f 00 vO 00 (M vO CM r- r- CM sf o ^r vO o o Ci r> CM 00 00 in vO *—\ 00 o O o o cn • H 4-i in vO CM r- CM in ^ r~- CO CM vO CM •—\ a> (H < +J o r> o 00 r. • • • • a> CM o o <_> o m •I - ) r» CM , — 1 og T) • • • • < o o o o TJ c a) mD CM 00 o >. 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E co j= O CO CM CO 01 U < 3 0) a lT) CON co d o CM CO d co d co co CN d CM d o d o CM CM d o d o o o d o d ■—I oo d iT) oo -p c 3 O o 0) c CO o o o d o d CM co d oo -p c 3 O u oo CO CM O o sO t» >• +-> c CN 3 • O O U 0) o ^H ^H o CO co IV J o o o d o d o d iD vO o "* pH f- o CN c- in • --< o »— ) o in H oo o o oo 00 o 00 CT> o> o t- 00 r- UJ CN 3 UJ 3 UJ Ol UJ UJ r-^ UJ 14 -H UJ vO UJ 3 3 CO UJ oo UJ 00 UJ o 3 co •UJ H UJ 00 2 I 00 1 CO 00 2: i 2 1 00 1 2 1 2 2 1 00 1 2 3? UJ 1 2 3 CN UJ 2 co UJ 2 UJ 2 H UJ k UJ 2 in uj cN 2 CN CO CN oo 00 CN 2 H oo ^H to ^r oo <3 2 <* oo co _ 1 1 CM t 1 1 1 1 1 1 3 CO 3 r- UJ 1 uj in UJ CN UJ t- UJ co 3 vO 3 00 uj in 2 CN 00 CN 00 r- 2 CO 00 CM 2 CN oo 00 CO r— 1 oo CN 2 — • cfl 0) M-i h ^H - U o 3 .— f N 0) u -P O CTi 5 o CD h -p in .*: 0) -P -P c s 5 dl u Ol N •p co to 3 Ol X en 01 j*; -p H M o •iH • CO •H • H >. (0 CO pa >• Q CO s X o 00 2 3 58 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 292 CD 3 C CM CD I— I XI H -o 0) >> c -p • H ■H e > M (0 Oi (H -P cn 0) Q o •H ■a <+H cu •H +> O <0 (1) -p o 2 3 ••> 3 O -P vO CM X c - -P CO c o> CM 3 • O o u o e o O CD • U C -P 3 (X o o d iT) CN LU z z. CM ro 3 i Z r- u •H cfl .— 1 3 (8 S CO 00 o o d CO co >. -p c CO 3 O o u >- CM Xf • .— ) o CD x CO co CO co in co in CM o d CM r- oo r- ■—< co *t o CO n in vO ID CO CO M0 in in CM o r- d o d d CM in 00 vD - -p c 3 CM vO o O • • • o .—1 o o c o CO o r- ■H rH o o o •H e h CD f- o o o in d in .—i ^ d uj sr ai cm UJ o 2 ro i— i 1 O c o 3 x o o H CO 3 Q. CO •H J«! -C O co in ro m . — i CM 03 co m M0 2 3 3 ^H r-H CM s .— 1 3 ■— I U4 -H 3 1 CO | CO 1 Z 2 2 LU o> 3 O 3 O z; rH LT> CM Z CN UJ M3 3 CO UJ CM z CM CO -o 03 ^H c o CD Q. CO (H a. c O CD X O X o S CO >-) Illinois State Geological Survey Circular 292 58 p., 24 figs., 2 tables, 1960 mnznn t CIRCULAR 292 ILLINOIS STATE GEOLOGICAL SURVEY URBANA