ONTARIO 723 



Medina, and Trenton. It may be added that, owing to differences in 

 nomenclature, there is more or less confusion in the age terms em- 

 ployed. 



ONTARIO FIELDS 



The following brief notes on the Ontario fields, compiled by C. W. 

 Knight, give some of the chief characteristics :^ 



"Lambton County Oil Field 



"The Lambton field has been producing continuously since 1862, In the first 

 few months of its history a few of the wells yielded from 1,000 to 7,500 l)arrels 

 daily ; but at present, and for many years in the past, the* average yjeld of a 

 well is very small — ^probably 8 or 9 gallons a day. In 1905, for instance, E. T. 

 Corkill noted a group of 100 wells which together were producing 150 barrels 

 a month. It has been pointed out by T. W. Gibson that 'it is only the large 

 number of wells, and the economy in management which long experience has 

 taught the operators, that enables Lambton County to be reckoned among the 

 oil-producing regions today.' 



"The wells are located in the townships of Enniskillen and Moore — largely 

 in the former, where are situated the towns of Petrolea and Oil Springs. The 

 Petrolea field is the largest in area in the province, extending about ten miles 

 northwest to southeast, with an average width of three miles. 



"Oil occurs at a depth of 370 to 480 feet below the surface, and at 60 to 70 

 feet below the top of and in the Onondaga limestone. 



"The deepest well in Ontario was drilled in 1915 in concession XI, township 

 of Enniskillen. A depth of about 4,000 feet was reached without striking either 

 gas or oil. 



"Tilbury or Kent Oil Field, Kent County 



"Oil was first discovered in East Tilbury township in 1905. Two years later, 

 in 1907, the production had risen to 411,588 barrels ; but by the year 1914 it 

 had fallen to 18,530 barrels. 



"Oil occurs in the Tilbury field, which lies for the most part in East Tilbury 

 township, and partly also in Romney and Raleigh townships, at a depth of 

 1,250 to 1,426 feet below the surface. According to Eugene Coste f 



" 'The two upper oil pays in the southern part of the field are found in the 

 lower brown dolomites and gypsum of the Onondaga, while the lower oil pay 

 is struck in the upper beds of the Guelph and Niagara. In the northern end 

 of the field, north of the Michigan Central Railway, the lower beds of the 

 Onondaga are barren of oil, which is there altogether found in the Guelph, but 

 the gas is still found there in the lower beds of the Onondaga, in the strata 

 which form the first and second oil pays of the south end of the field. In the 

 east middle part of the field, on the other hand, the oil is struck in the Onon- 

 daga strata which constitute the gas pays in many of the wells of the middle 

 western part of the field.' 



5 Ontario Bureau Mines, vol. xxiv, part 2, pp. 10, 11. 

 « Jour. Can. Min. Inst., vol. x, p. 82. 



