On the Subsurface Studies of Main Oil and Gas Fields in Taiwan (Part 2)

Abstract

The Chinshui oil field succeeded in the well No. 5 for the first time. This is the second oil field in Taiwan which produces gas in great quantities with oil. Petroleum is producing from the lowest Shukkoko sandstone shale formation while gas is flowing from the upper sandstone shale formation and the white sandstone formation. The structure of this oil field is 5 km in length and is of anticlinal structure with somewhat steeperwest wing. Forty-seven wells were drilled up to the present and produced about 9, 200 kl petroleum and approximately 1, 870, 000, 000 m3 gas as of the end of April, 1956. This paper contains the result of the studies on the shallow zone Keichikurin formation in collaboration with the Chuton gas field, the conclusion of which is as follows: 1. In the sandstone zone at the top of Keichikurin formation rejuvenation of 1-2 wells of Chihchitze area by the gunperforation is possible, but in the Ia layer rejuvenation can not be expected. Both the underground structures of the sandstone zone at the top of Keichikurin and the Ia layer of Laotien Liao area located further below Chihchize, and there is a little hope of success there. 2. Judging from the change in the thickness of the each formation and etc, it is advisable to advance an examination into further lower formation by carrying out exploration in the depth.