Abstract
Photogeology has made a marked development during the last twenty-five years as a tool for exploration of oil and gas deposits. In the author's opinion, however, it is still in an early stage in Japan, and there is no systematic study concerned with this science in the domestic oil bearing formations. Accordingly the author has made an attempt to study the photogeology in Japanese oil fields. In this paper, the results of the studies in Tamuigyama oil field and its vicinity are briefly described and concluded that the photogeologic interpretations are very useful in the investigation of Japanese sedimentary regions.
A summary of results of this sutdy is as follows:
1. Tamugiyama oil field (Approximately 37°08'N. Lat., 139°06'E. Long.) and its vicinity has been surveyed by the author and other field geologists, and the Neogene formations developed in this area were divided into nine lithological units. In consequence of photogeologic survey, it is also divided into nine rock units and their distribution shows the same feature as that found by surface geological survey. However the formations which are divided by fossils, but have same lithological components can not be definitely discriminated by airphotograph.
2. Anticlines, domes, and faults which are recognized by photogeological method, coincide with the structures actualy surveyed on the surface.
Although photogeologic method has not been appreciated by many Japanese geologists in the past, the result of the recent investigation gave the author the impression that this is a very useful technical method in search of petroleum geology.
