Lesley.] doO fDec. 15, 



Colorado Well, No. 5. 



Struck about August, 1871. 



Located 14 rods south of No. 4. 



Level of well mouth above ocean level. No. 1 -{- 31' =* 1398 



Drive pipe to rock 70 to 70 = 1328 



l8t and 2d Sands and intervening measures 



" regular " to top of 3d S. S 423 " 493 = 905 



3dS. S 43 " 536 = 863 



? pocket. 7 " 543 = 855 



Wet hole. Cased at 217 feet. Crevice in 3d sand 11 feet below the top. 



Natural production 60 barrels per day at commencement, but declined 

 quite rapidly to 15 barrels. Remained thus for some time until torpedoed 

 wiien it declined to 10 barrels. 

 First torpedo exploded 5 feet below top of 3d S. S. 

 Second " " 11 " " " 



Third " " 5 " " " 



Fourth " " 26 " " " 



The production steadily declined ; no beneficial results following the use 

 of any of the torpedoes, except a slight temporary increase from the last. 



The volcanic treatment was also tried without any marked effect. 



The 3d sand was better than the average sands of other wells drilled in 

 this neighborhood. The best and softest stratum commenced 3 feet below 

 the top of the rock and continued to 7 feet. From 11 feet downward to 

 the bottom of the rock the sand was good, but not as soft as in the upper 

 division. 



Colorado Well No. 6. 



August I6th, 1871. 



Level of well mouth above ocean* 



Casing to rock 32 feet. 32 = 



? 318 to 330 =r 



1st S. S 40 " 390 = 



? 107 " 497 — 



2d S. S 19 " 516 =^ 



? 81 " 597 — 



3d S. S 46 " 643 — 



? pocket. 8 " 651 = 



Wet hole, cased at 516. 



Third sand very close and hard. Natural production less than 1 barrel 

 per day. 



, First torpedo exploded 7 feet below top of 3d S. S. Production increased 

 to 10 l)arrelsbut soon declined to 5 barrels. 



Second torpedo 6 feet lower. Increase to 10 barrels but for shorter time 

 than the first. 



Scratched, with no benefit. 



* Oil City Depot provisionally 90.5' + P. R. R. datiuii + 7 for ocean level. 



