Journal of the Japanese Association for Petroleum Technology
Online ISSN : 1881-4131
Print ISSN : 0370-9868
ISSN-L : 0370-9868
Volume 26, Issue 8
Displaying 1-5 of 5 articles from this issue
  • Koji MOTOJIMA, Shinichi MAKI, Hiroshi YONETANI
    1961 Volume 26 Issue 8 Pages 386-393
    Published: November 30, 1961
    Released on J-STAGE: December 25, 2008
    JOURNAL FREE ACCESS
    Chemical analyses were mad of bluish dark grey mudstones collected at natural gas test boring well of 60 meters deep at Ashikajima, Choshi-shi, Chiba Prefecture. The followings have been clarified by geochemical consideration of the analytical results.
    1. It is presumed from the relative abundance of Ga-Rb-B, absolute abundance of B (100 ppm), Clcontent in interstitial water (maximum 6g/l), existence of pyrite that the mudstones are marine origin.
    2. It is presumed that the mudstones were deposited in the sea, not very far from the land, as they contain relatively large amount of titanic minerals.
    3. This is also supported by the fact that the mudstones contain high amount of organic carbon, and by the relation between organic carbon and org. C/org. N, as well as the relation between organic C and the degree of hydrocarbonization* of the rocks.
    *degree of hydrocarbonization
    =carbon in hydrocarbons (paraffin+cycloparaffin+aromatic)/organic C _??_hydrocarbon×0.86/organic carbon
    4. The mudstones contain 1-2.4% of organic carbon, which is fairly high value as marine mudstones.
    5. The degree of hydrocarbonization of the mudstones shows 0.009-0.04 (average 0.021), which is as high as the value of mother rocks of the Niigata oil field.
    6. Oil and gas showings have been observed at this well. It is considered that the oil and gas are derived from these mudstones of the Cretaceous system.
    7. Gas component (in vol. %) is; He··0.020, O2··0.05, N2··13.43, CH4··85.46, CO2··0.88, C2H6··0.23, C3H5··0.04.
    8. It is presumed that meteoric water invadad at the crushed part at 30m deep of the well.
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  • Shozo TANAKA
    1961 Volume 26 Issue 8 Pages 394-401
    Published: November 30, 1961
    Released on J-STAGE: December 25, 2008
    JOURNAL FREE ACCESS
    In this paper the author's investigation is carried out to find answers to the following questions:
    1. How to design gas lift installation of a low capacity well.
    2. Can we get more oil production when gas lift method is adopted to a flowing well
    3. Effect of submergence on oil production of gas lift well.
    4. Relation of pipe size to the period we can get oil production by applying gas lift method.
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  • Bunkichi OKINO
    1961 Volume 26 Issue 8 Pages 402-406
    Published: November 30, 1961
    Released on J-STAGE: December 25, 2008
    JOURNAL FREE ACCESS
    In this paper, the author describes about clay minerals in shales by X-ray diffraction methods (follows Report 2) and phenomenons of shales in fresh water and several electrolyte solutions.
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  • Part-1 Gel-frac in Yabase Oil Field
    Norio OGINO
    1961 Volume 26 Issue 8 Pages 407-414
    Published: November 30, 1961
    Released on J-STAGE: December 25, 2008
    JOURNAL FREE ACCESS
    There are three factors, well condition, injection rate, and injection fluid, affecting the efficiency of fracturing of the treated oil reservoir.
    One of these, injection fluid is characterized by physical and chemical properties.
    Here, the author takes up the matters which are regarded very important for fracturing operation in the oil field.
    The discussion is made on some deviation of the laboratory study from field data in Yabase oil field.
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  • [in Japanese]
    1961 Volume 26 Issue 8 Pages 415-417
    Published: November 30, 1961
    Released on J-STAGE: December 25, 2008
    JOURNAL FREE ACCESS
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