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全文: "メキシコ湾岸油田"
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  • 梅野 昌
    日本ゴム協会誌
    1964年 37 巻 6 号 419-423
    発行日: 1964年
    公開日: 2008/04/16
    ジャーナル フリー
  • 大見 美智人, 井上 正康
    応用地質
    1974年 15 巻 1 号 14-22
    発行日: 1974/04/30
    公開日: 2010/06/04
    ジャーナル フリー
    It is necessary for measurment of moisture content and porosity to define the dry condition of rock samples. Nevertheless various coditions of drying are actually adopted by many peoples.
    In this paper, the weight of samples, velocities of elastic waves and uniaxial complessive strength of rock specimens were measured at seven different condition of drying which are 50, 75, 105, 125, 150°C constant temperature for 48 hours, kept in desicator contained silicagel for a month, and dried naturall in the room.
    Sandstone and andestite have a different tendency of change in measured values. Results obtained in this paper are summarized as follows:
    (1) In regard to the change of weight, a remarkable effect of drying is showed at 50°C constant temperature dring for andesite which have higher porosity, and showed barely a constant weightat drying over 105°C for sandstone which has lower porosity. The drying in desicator contained silicagel has a similar effect at 50°C oven drying for andesite and 75°C for sandstone.
    (2) Dillatational waves of specimen show a maximum velocity at 50, 75°C drying forandesite, at 75, 105°C and silicagel drying for sandstone. Increase of the velocities for both rocks become dull at drying over 125°C Velocities of longitudinal vibration show a similar tendency of the dilatational waves for andesite, and show a maximum value at 105°C and silicagel drying.
    (3) Compressive strength of both rocks shows an increase in the region from room temperature to 150°C drying. Compressive strength for andesite fairly increases at 50°C drying, and that for sandstone shows a remarkable increment at 105°C drying. Compressive strength at silicagel drying shows a similar tendency of velocities.
  • 本島 公司, 永田 松三
    石油技術協会誌
    1973年 38 巻 5 号 268-281
    発行日: 1973年
    公開日: 2008/06/30
    ジャーナル フリー
    Sixteen mudstone core samples from marine Neogene formations in Okinawa and Miyazaki gas fields were used for the determination of water content. To determine the water content, the following two methods were conducted.
    1. Dry up at 105°C.
    2. Dry up at 60°C and 40% of relative humidity.
    Experimental data are shown on the Table 2 and 3. In case of the core samples shallower than 1, 200m in depth, 105°C values are larger than 60°C values by 13_??_30v/v%, and there is a good positive correlation between apparent specific gravity and difference of 105°C values and 60°C values.
    The chlorine ion concentration in the interstitial water of mudstone shallower than 1, 200m (apparent specific gravity<2.25) is almost equal to that of the nearby groundwater. While, in case of heavy muddy rocks (apparent specific gravity>2.25) from the depth more than 1, 200m, chlorine concentration in groundwater is higher by 10_??_ several 10% than that in the corresponding interstitial water.
    The noticiable physical discordance at 1, 200 in deep is important for the study of the gene-ration, re_??_ention, migration, maturation and metamorphism of hydrocarbons in the Neogene formations in Japan.
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