SANTA CLARA VALLEY: OJAI VALLEY FIELDS. 
41 
shallower wells, although having a greater initial production than No. 
5, which was deeper, did not hold out nearly so well. The yield of the 
wells was never very great and they were finally abandoned in 1904. 
SOBRA VISTA WELLS. 
The Sobra Vista wells, three in number, are located at the head of 
the Upper Ojai Valley, immediately south of the Whidden-Double 
property. As indicated by the structure in the immediate vicinity, 
the wells are probably located on the north flank of the local anticline 
which is so well developed in the region of the Santa Paula group of 
Fig. 4.—Sketch map showing location of wells and oil seepages in the northeast corner of the Upper 
Ojai Valley. Heavy black dots, wells abandoned since beginning of 1902 ; the other symbol, wells 
abandoned previous to 1902. 
wells immediately to the west. The strata penetrated are the blue 
and gray shales of the Modelo formation, here containing interbedded 
sands from which, it is said, the wells derive their oil. In fact, the 
southernmost well of the group is located precisely on the line of 
strike of the sandstone which affords the heavy oil seepages on the 
Santa Paula property. The wells range in depth from about 375 to 
740 feet and obtain their oil from two sands about 240 feet apart, the 
upper varying from 10 to 11 feet and the lower from 4 to 11 feet in 
thickness. It is said that an 11-foot stratum of black water sand was 
encountered between the oil sands in one of the wells, and that in 
