新潟ガス田
特に新潟市附近における含ガス層の性質について
1953 年 18 巻 3 号 p. 83-103
詳細
1953 年 18 巻 3 号 p. 83-103
Niigata gas field forms a large synclinal structure comprising the reserve area of about 850 square kiiometers. The original gas reserve is estimated about 2, 000 million cubic meters.
The reservoir rocks are composed of very loose sand and gravel. In the vicinity of Niihata city, the gravel layer marker E, at the depth of 350 meters, and the gravel layer, marker P, at the depth of 550 meters, are productive.
The characteristic feature of this gas reservoir is to be containg one phase of water saturated with gas except small proportion of free gas bubbles. The original reservoir pressure was slightly lower than the hydrostatic head. The producing mechanism may be the gravity drive.
The result of the bottom-hole-pressure survey in 1952 in the Ogata district, which was developed with the well spacing of over 300 meters, has shown a little pressure drop, and the flowing of the wells, completed at E layer, have stoppd. The production of the wells of large initial production in this district, are declining.
