260 RECORD OF DEEP- WELL DRILLING FOR 1905. 
Feet. 
Soft black muddy shale, top of Third sand at 547 feet 350 -547 
Hard, coarse brownish sandstone, with pebbles, first 2 feet of Third sand 547 -549 
Hard light-gray sandstone and dark-gray shaly sandstone, second 2 feet of 
Third sand 549 -551 
Soft, coarse white or brownish sandstone, the pay sand; free flow of oil and gas; 
this probably overlain by a 1-inch stratum of black shale 551 -554 
Soft white porous sandstone, pay sand, bottom of pay at 557 feet 554 -557 
Hard, fine white sandstone — salt water; while drilling this 3 feet oil and water 
rose in the hole to a height of 100 feet; probably all salt water produced is 
from this horizon v 557 -560 
Hard grayish-white sandstone, called "Salt sand;" may contain salt water 560 -570^ 
Soft brownish-gray sandstone, bottom of Salt sand at 575 feet. 570^,-575 
Soft dark pebbly sandstone and shale, much "broken up" and not regarded by 
Mr. Winger as a solid sand 575 -579 
Soft dark-gray shale and light-gray sandstone and conglomerate 579 -583 
Hard shale, conglomerate, and sand (sample like preceding) 583 -588| 
Soft light-gray sandstone and dark-gray shale and sandstone, bottom of Third 
sand at 598 feet ; sand 51 feet thick. . 588^-598 
Soft black shale 598 -609| 
Rig used, standard. Diameter of well, 16 inches to 15 feet; 8 inches from 15 to 257' 
feet; length of casing, 257^ feet. Well shot at 551 feet with 40 quarts of nitroglycerin 
Yield first twenty-four hours, 111 barrels, 45° oil; initial pressure of gas estimated a 
60 pounds. 
1398. Well near Warren, Warren County. 
[Well completed in 1905. Authority, F. B. Jackson, owner. Samples preserved. Log compiled fron 
samples by S. Sanford.] 
This is the second deepest well drilled in northern Pennsylvania of which the Surve 
has a record. The formations penetrated are probably all of Devonian age. -The dri 
passed through the Catskill formation and through the Chemung, Nunda (Portage), Gei * 
esee (?), Hamilton, and Marcellus formations (Devonian), if the limestones encountereil 
below 3,395 feet correspond to the Onondaga, of New York. The only other well in tl | 
oil fields of northern Pennsylvania to reach the Onondaga is the Conway well, 3,880 fe< I 
deep, in Venango County. In the report of the Second Geological Survey of Pennsj 1 
vania, Vol. 14, Mr. John F. Carll indicated that the Onondaga might be found und ij 
Warren at a depth of about 3,000 feet. The oil-bearing sands found in the wells at Warn tjj 
underlie, at an interval of about 300 feet, the sands of the "Venango oil group," whi I 
contain oil at Grand Valley and elsewhere in the southwestern part of Warren Count | 
Owing to the lack of good evidence, no attempt is made to correlate the sandstones per }j 
trated by this well with those reported from the productive wells at Warren and Noi | 
Warren. The well started apparently in the " Venango oil group." 
Record of well on Greene farm, 3 miles west of Warren. 
Feet. 
Sand and gravel 0- 
Dark-gray sandy shale and light-gray argillaceous sandstone, slightly limy. - 100 
Dark-greenish argillaceous sandstone and reddish sandy shale 200- .' 
Dark shaly, argillaceous sandstone and gray limy sandstone 300- ( 
Dark shaly, argillaceous sandstone 400- 
Dark gray shaly sandstone, slightly limy 547- 
Gray sandstone and dark sandy shale 592- 
Coarse gray sandstone and dark sandy shale 614- 
Gray and greenish sandstone, slightly limy 640- 
