352 The Philippine Journal of Science 1913 



and below, this oil bearing strata was cased out and the well continued to 

 its present depth of 127 feet and the casing extended down to 103 feet. The 

 second oil strata was found at a depth of 117 feet extending downward 5 

 feet or to a depth of 122 feet. The yield of oil at this depth was practically 

 the same as that of the first strata, but a satisfactory pumping test could not 

 be carried out with the mud bailer, there being no other appliance at hand. 



It is believed that the strata, "the crumbling nature" of which 

 made it necessary to case out the oil from the upper horizon, 

 were principally shale, and probably represent the Bacau stage 

 of the Vigo shale. Mr. McDaniel has stated in conversation that 

 both the zones from which oil was obtained are sandy. Prob- 

 ably the shale above and below the "oil sands" was petroliferous 

 throughout. Occasional sandy beds have been noted in the pe- 

 troliferous shale, and it would be expected that where the con- 

 ditions were such as to prevent its escape more oil would 

 accumulate in the sandy beds than in the closer-grained shale. 



If the wells are east of the anticlinal axis, as the relations 

 indicate, the strata encountered probably dip at an angle of 

 about 55°. Well 1, consequently, pierces beds aggregating only 

 22 meters in thickness, and the upper and lower sandy zones 

 are 0.87 meter and 1.04 meters thick, respectively. 



In February, 1913, the well was pumped dry with the bailer. 

 About 30 liters of oil were obtained from the column of water 

 and oil which filled the casing to within 21 meters of the surface. 

 The well proved to be 35 meters deep, the original casing having 

 been driven to that depth recently. Apparently, the well is 

 caved above the lower oil horizon reported, while the upper 

 horizon is sealed off by the casing. It is probable that by proper 

 treatment this well could be made to yield daily a barrel or 

 so of oil. 



Bahay well 2 is located 50 meters north of well 1 on the west 

 bank of Bahay River. If the assumed structural relations are 

 correct, well 2 is about 25 meters farther east of the anticlinal 

 axis than well 1. Well 2 was drilled with a standard rig by 

 Mr. O. A. Leary, and reached a depth of 91.5 meters. The casing 

 at the collar of the well is 10 inches in diameter. Mr. Leary has 

 kindly furnished the following statement which constitutes the 

 only information available concerning this well : 



Log of Bahay oil well 2. 

 to 25 feet. 



Conglomerate, yellow sand, clay and gravel with large bowlders. 

 25 to 100 feet. 



Brown shale showing evidences of oil and gas. 



