Show P I ey eye eyk f C k e j Ml L a L 4 w I H I m s Mountain Fuel Its New Reservoir Valuable Addition I I Mountain Fuel Supply Company's ComI Company's Com Com- pany's experimental natural gas storage reservoir in the Chalk Creek structure east of ot Coalville is proving to be a valuable addition addition addi addi- tion to the Company's Company facilities for tor meeting peak load requirements requirements require requIre- ments ac according toM torM toMM M r. r executive iv vice pres president erit Dehydration Unit Already this year the Company has had had to make withdrawals from th the reservoir to augment pipeline ri deliveries when cold wea weather weather ther caused an increase in consumer consumer consumer con con- sumer demands This year these withdrawals have been made at volumes as high as cubic feet a aday aday aday day day five tunes times the rate that was possible previously The higher rate of withdrawal has been made possible by the installation of ot a larger-capacity larger dehydration unit at the storage 1 field eld Mr Fidlar said 1 I Gas from storage must be passed passed passed pass pass- ed through the dehydrator to strip It of ot water vapor before it can I i be returned to the main pipeline he said The fact that the e gas gasIs gasis gasis is being stored in water-bearing water sands has made a dehydration unit a necessity I I Although the reservoir has proved valuable as a shaver peak I I I 1 I I t it remains to be seen whether it will have the capacity to make itI itI it feasible as a system load equal I or or Mr Fidlar said We still dont don't know the capacity of the storage storage reservoir but it would have to hold upwards of three billion cubic feet teet of working storage storage stor stor- age gas to make it t suitable as a n load To date the greatest volume of ot gas in storage at the reservoir I has been about ruble cubic feet considerably below the I amount needed if 11 the reservoir Is isto is' is isto i to serve as a load I Load Equator I Ios As os a load-equator load it in effect would be another regular source rather than only a peak day source of gas BOS during the winter months Mr Fidlar pointed out Gas Oas would be Injected Into the I r reservoir during the summer when consumer demand Is Js at its low Jow point and would be e withdrawn withdrawn with with- I drawn during the cold of ot winter when consumer demand is I at Its iU highest t. t I j I I II i T The h 11 Chalk I e Creek reservoir I I structure had hod been considered t at atone atone atone one time as a likely source t for I I I either gas or oil op Two wells drilled drilled drill drill- ed into the structure one structure one In the I and the other ther in the I proved unproductive and thus eliminated it as a possible producing pro pro- producing area i However the characteristics of the structure an ana iU Its proximity to Mountain Fuels Fuel's main transmission trans trans- mission pipelines pipelined from Wyoming made it t attractive as a possible storage reservoir particularly after aft aft- or er other locations closer to the Salt Lake City area had bad to be I rejected for various reasons t. t Tests Test Made 11 I ft Experimental work work to to test s the J e structure as a reset reservoir reservoir I of f 1 egan began more than a year ago ago The Company Company Com Com- Company pany the two old wells for observation purposes then drilled four tour n new w wells two for observation bs r p purpose s one one for injection and arid withdrawal 1 1 of gas and on one a as a water withdrawal well e I I A I IThe The latter well welt WI was L required because the Kelvin formation in which drilling and I storage were done Is js composed in this area of three segments of Wl ing sands sal It was OI that hat by drilling a n water water wl withdrawal val al alwell well down structure down tt item from m tl e injection in inJection injection in- in well that additional age capacity could be provided prodded for gas without having to d j ce wAt water r. r Some barrels of Water water water wa wa- ter were removed ft m the truc- truc ture before th the Injected gas reached this well I A horsepower compressor has been pumping gas info the e re reservoir on a limited I pasts frosts throughout the past summer Through the observation wells continuous checks of ot pressures have been made made which give in In- indication as 03 to whether gas gM Is ia building up or spreading out within the structure Limiting Factor I A limiting factor on the reservoir reservoir reser reser- voir is the depth of ot the rock rock rockI I cover over the underground formation formation formation for for- mation as it relates to the e underground underground underground un un- pressure f Tire The e maximum maxi mum amount of ot pressure pressure ui the overburden over- over den burden should be subjected to from below is Js about tenths six ofa of ofa a a. pound per square inch for tor each toot foot of ot cover At Chalk Creek Mountain Fuel js is working with 1140 pounds per square inch inci as I maximum wellhead pressure I Weather permitting th the dom Company Com Com- pany will wUl continue to make inJections InJections In In- this winter in an effort to determine the he he eXtent tent of the reservoir lr However whenever the tho need arises withdrawals Of Of ot gas gaa can be made up to Qubie feet a day to augment P pip line deliveries |