viii, a, 5 Pratt and Smith: Petroleum Resources 353 



100 to 105 feet. 



Coarse gravel with • considerable quantity of oil and gas, and at this 

 depth pipe was roughly packed and one-half-inch connection inserted. 

 The gas was ignited and allowed to burn for fourteen hours without 

 showing any decrease in volume, the blaze being approximately 10 

 feet in length. 

 105 to 115 feet. 



Very hard gray rock; expei'ienced considerable difficulty in drilling, 

 owing to hardness. 

 115 to 170 feet. 



Blue clay, showing streaks of clay lighter in color. 

 170 to 225 feet. 



Brown shale heavily saturated with oil. 

 225 to 300 feet. 



Brown shale very compact and of an elastic sticky nature. Drilling 



very difficult owing to this feature. 



Very little water was encountered during the entire drilling of this well. 



At 20 feet a slight showing of fresh water; at 100 to 105 feet the presence 



of a small quantity of salt water was noticed. The well was practically 



free from water. Temperature of formation, normal. 



Below the surface debris, which extends to a depth of 25 feet 

 (7.6 meters), this well appears to have entered the Bacau stage 

 of the Vigo shale and to have continued in this formation 

 throughout. However, it may be that the "coarse gravel" and 

 "hard gray rock" encountered in the well represent the con- 

 glomerate or gravel and the limestone exposed in Bahay River 

 section (Table X, page 320) above the Vigo shale. The 

 "evidence of oil and gas" in the "brown shale" above the "coarse 

 gravel" is not in accord with this possibility, however, since the 

 gray clayey sandstone exposed in Bahay River section above 

 the conglomerate certainly shows no trace of oil or gas. 



If the eastward dip of 55° in the shale north of the wells 

 prevails at the site of well 2, the total thickness of strata pierced 

 is 52.2 meters, the "coarse gravel" is 0.9 meter thick, and the 

 "hard gray rock" is 1.9 meters thick. 



PETROLEUM ON MILIPILIJUAN CREEK 



Near the head of Milipilijuan Creek, which flows into Bahay 

 River from the north, oil is encountered seeping directly from 

 bluish to brownish black shale. The seep is at an elevation of 

 85 meters, and is approximately 1,500 meters north-northwest 

 of the junction of Milipilijuan Creek and Bahay River. The 

 shale from which the oil escapes dips northeast at an angle of 

 53° and contains some interbedded sandstone. Downstream 

 a short distance, similar shale outcrops at several places, striking 



