石油技術協会誌
Online ISSN : 1881-4131
Print ISSN : 0370-9868
ISSN-L : 0370-9868
ガスリフト法の設計に関する研究
舟越 竜田中 正三谷口 啓之助滝沢 桂一
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ジャーナル フリー

1955 年 20 巻 4 号 p. 101-105

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When the present writers designed a gas lift installation, they depended on the past experience. Because they have many variables involved in making gas lift calculation. The study of continuous flow gas lift well by F.H. Poettmann and P.G. Carpenter made it possible theoretically to design gas lift installation. The gas lift system is actually in practice at Niigata gas field, Mobara gas field and many other gas fieleds in the country. If writers can apply their theory to designing gas lift well in the gas fields of Japan, the efficiency of gas production from the wells may be increased. The most common type of gas lift method at the gas fields is one in which the gas is injected into tubing and the production returned through the annulus. They studied the gas lift method in which the gas was injected in the annulus and the production returned through the tubing, and the the correlation curve, though essential in their theory, can not be extended to flow through casing size. Making the application of their method, writers must study whether writers can use their method or not.
Writers carried out the gas lift tests, in which the gas was injected into the tubing, at 6 inches water well drilled in the Akita University field. The results from the tests were the same as those obtained from the calculation based on their theory. (see Fig. 2) It became clear that their theory could be extended to the gas lift in which the gas was injected into tubing. And writers calculated the correlation factors from the data collected at Niigata gas field, and a plot of the correlation factors versus the product of the hydraulic radius of the annulus and the mass velo city of the fluid is shown in Fig. 3. By using the correlation curve, writers may desigen the gas lift wells in Niigata gas field and may increase the efficiency of the gas production from wells.

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