Journal of the Japanese Association for Petroleum Technology
Online ISSN : 1881-4131
Print ISSN : 0370-9868
ISSN-L : 0370-9868
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Volume 18, Issue 6
Displaying 1-3 of 3 articles from this issue
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  • Fundamental Properties of Decline Curve
    Kiyomitsu FUJII
    1954 Volume 18 Issue 6 Pages 358-365
    Published: February 28, 1954
    Released on J-STAGE: June 30, 2008
    DOIhttps://doi.org/10.3720/japt.18.358
    JOURNAL FREE ACCESS
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    Because the decline curve is affected by physical properties of an oil reservoir, the theo-retical decline curve is obtained by the use of the data of reservoir conditions. In this paper the method of obtaining theoretical decline curve using reservoir data is explained, and funda-mental properties of both production decline curve and pressure decline curve are described.
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  • A Study on the Flow of Gas-Dissolved Water
    Shozo TANAKA
    1954 Volume 18 Issue 6 Pages 366-370
    Published: February 28, 1954
    Released on J-STAGE: June 30, 2008
    DOIhttps://doi.org/10.3720/japt.18.366
    JOURNAL FREE ACCESS
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    A consideration of the linear flow of gas-dissolved water is described in this paper. The reservoir is 1, 500 ft in length and 10 ft2 in sectional area, having permeability of 17.5 darcys and relative permeabilities of curves shown in Fig.4. Gas-dissolved water flows into the reservoir under pressure of 800 psia and flows out under atmospheric pressure. The results computed on the rate of flow, on the pressure gradient, and on the gradient of water premeability are shown in Figs. 7 and 8. Accoring to the results obtained it becomes clear that the flow of gas-dissolved water can be treated as flow of pure water. The reason for this is that, free gas does not flow through the reservoir, because gas saturation in the reservoir is lower than equilibrium gas saturation.
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  • Study on Drilling Fluids
    Study on oil emulsion drilling fluids, 1
    Bunkichi OKINO, Kazuo IIDA
    1954 Volume 18 Issue 6 Pages 371-377
    Published: February 28, 1954
    Released on J-STAGE: June 30, 2008
    DOIhttps://doi.org/10.3720/japt.18.371
    JOURNAL FREE ACCESS
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    For the purpose of obtaining an effective emulsifier for high pH Lime-emulsion drilling fluid, the humic acid has been researched in our oaboratory, and it has been found that it is superior to other various surface active agents. In this paper the effect of the humic acid upon drilling fluid is described.
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