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 28, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • Biostratigraphy (Foraminifera) of the Kazusa Group on the Boso Peninsula
    Yoshiki KIKUCHI
    1963 Volume 28 Issue 4 Pages 120-125
    Published: July 30, 1963
    Released on J-STAGE: March 27, 2008
    DOIhttps://doi.org/10.3720/japt.28.120
    JOURNAL FREE ACCESS
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    Since the stratigraphy of the Boso peninsula, Chiba prefecture was first undertaken by T. Mitsuchi (1937) in his geological map "Mobara ", many authors have contributed to the geology and paleontology of the region. Among then, K. Kawai (1961) in particular had contributed to the economic geological study on the southern Kanto gas-producing region. Recently Y. Ishiwada, Y. Higuchi and the writer (1962) published the correlation by the smaller foraminifera on the southern Kanto gas field.
    Surface and subsurface exploration for the natural gas during recent years made the environmental condition of the Kazusa Group on the Boso peninsula clear. The purpose of this report is to describe the correlation of the subsurface biostratigraphy in the northern peninsula to that of the type rout (middle and eastern part of the Peninsula) by the smaller f oraminif era and clear the environmental condition under which the formations was deposited.
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  • Eliminating Sand in Drilling Mud by the Use of Cyclone
    Eishiro ISHIZUKA
    1963 Volume 28 Issue 4 Pages 126-136
    Published: July 30, 1963
    Released on J-STAGE: March 27, 2008
    DOIhttps://doi.org/10.3720/japt.28.126
    JOURNAL FREE ACCESS
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    The data contain the experimental result on the elimination of the sand in drilling mud by the use of cyclone, which made it possible to get the right size of the feed, the over flow orifice size and the under flow orifice size to the optional body diameter of cyclone in the case of the high viscosity fluid like drilling mud.
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  • Interpretation of the Heaving of a Well by the Use of Caliper Logging
    Kiyomitsu FUJII
    1963 Volume 28 Issue 4 Pages 137-141
    Published: July 30, 1963
    Released on J-STAGE: March 27, 2008
    DOIhttps://doi.org/10.3720/japt.28.137
    JOURNAL FREE ACCESS
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    By the use of caliper logging the diameter of a drilled well is measured quantitatively. Combining these results with geology and drilling method, the conclusions about the heaving are obtained as follows:
    (1) There are two causes for the heaving: the property of stratum and the drilling method.
    (2) Certain stratum has tendency to heave. It depends on clay mineral in the stratum.
    (3) Stratum heaves under unfavorable drilling conditions such as a slow drilling rate, reaming, and the use of unsuitable mud fluid.
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  • A Study on Viscometers for Drilling Fluids
    Shoichi TANAKA
    1963 Volume 28 Issue 4 Pages 142-148
    Published: July 30, 1963
    Released on J-STAGE: March 27, 2008
    DOIhttps://doi.org/10.3720/japt.28.142
    JOURNAL FREE ACCESS
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    Both theoretically and experimentally a research on three viscometers was carried out.
    1. By the use of V-G meter the relationship between the density of mud fluid and the rheological properties such as plastic viscosity, yield volue and gel strength is obtained.
    2. There is a certain relationship between the volue obtained by Marsh Funnel viscometer and the plastic viscosity divided by the density.
    3. The apparent viscosity measured by Stormer viscometer is between the apparent viscosities measured at 300rpm and 600rpm by V-G meter.
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