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Volume 44 (1979)
- Issue 6 Pages 367-
- Issue 5 Pages 233-
- Issue 4 Pages 175-
- Issue 3 Pages 115-
- Issue 2 Pages 53-
- Issue 1 Pages 1-
Volume 44, Issue 3
Displaying 1-7 of 7 articles from this issue
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Tatsuo TANAKA1979 Volume 44 Issue 3 Pages 115-123
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSThe methods for interpreting results of deliverability tests have been considered by various authors(1)-(6). The major viewpoint of discussion however, is based only on the flow capacity, refered to as absolute open flow potential.
The discussion in this paper is not only the calculation of flow capacity, but also the calculation of several other reservoir parameters, such as permeability and drainage radius. A new graphical method is used to interpret the result of general deliverability test, and a new factor 'Turbulence Correction Factor' (Ftc) is applied. This factor (Ftc) is shown to be dependant mainly upon the reservoir pressure and the coefficients "C" & "n", which are calculated by using the general back pressure curve (See Eq. 1).
The author discusses the above in relation to both the Steady State and the Unsteady State condition, and he carries out six case analyses with actual field data.View full abstractDownload PDF (972K) -
Atsuo AIHARA1979 Volume 44 Issue 3 Pages 124-133
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSRevised parameter to measure and compile the degree of organic metamorphism of the Tertiary and the upper Cretaceous systems based on vitrinite reflectance value (R0) are introduced; i. e. V-value, decupled R0, ν-value along iso-rank direction in the traditional proximate rank classification diagram (Fig. 4). Numerous data of proximate analysis of the Tertiary and the Cretaceous coalfields and coal-bealing strata are classified by ν-value to expose regional and stratigraphic variation of organic metamorphism (Figs. 5, 6). Depth-vitrinite reflectance gradient in oil exploring deep drill holes in the western flank of the Hidaka orogenic belt is confirmed to correspond the smaller value to lower terrestrial heat flow region. Since the pattern of organic metamorphism and the regional variation of terrestrial heat flow is satisfactorily correlated, the depth of petroleum generation zone is able to be predicted based on surface organic metamorphism degree and geothermal structure in connection with subsurface vitrinite reflectance gradient, and finally regional restriction for f abourable petroleum exploration is suggested from the view point of organic metamorphism.View full abstractDownload PDF (1313K) -
Keizo FUJII, Hiroshi YONETANI, Masatoshi SOGABE, Minoru SASAKI, Noriak ...1979 Volume 44 Issue 3 Pages 134-143
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSThe degree of coalification and chemical properties of macerals were studied concerning the sub-bituminous coal in the Kushiro coal field, eastern Hokkaido.
The reflectance of vitrinite ranges from 0.55% to 0.65% in oil. The peak of fluorescence spectra pattern of sporinite and resinite ranges from 490nm to 520nm and from 480nm to 520nm respectively.
As the result of the maceral analysis, the macerals of the coal in this field are mainly composed of vitrinite group with under 5% exinite and inertinite groups. The vitrinite group is composed of collinite, telinite and degradinite.
Degradinite is characteristic of the Japanese coal and is characterized by higher volatile matter content and carolific value in comparison with collinite and telinite.
In the same stage of coal rank, the distribution of normal alkane, CPI value and total n-alkanes of degradinite seems to be different from those of collinite and telinite. That is to say, the distributional maxima of degradinite are n-C29 and n-C31, on the other hand, the maxima of collinite and telinite fall to n-C18 and n-C19. CPI value ranges from 2.3 to 3.4 for the coal with 30-40% degradinite content, and 2.1 for the coal composed of collinite and telinite. Total n-alkanes content is higher in the coal with 30-40% degradinite content than that of collinite and telinite.View full abstractDownload PDF (1010K) -
Shoichi TANAKA, Hiroyoshi SUZUKI1979 Volume 44 Issue 3 Pages 144-148
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSCores and cuttings are taken from a well located near Tokyo. Thermal conductivities of cores are determined from divided bar method. Thermal conductivities of cuttings are determined from needle prove method, and evaluated by three models, i. e. series distribution model, parallel distribution model and randam distribution model. For sandy siltstone in shallow depth, the randam distribution model gives same value as that obtained from cores, and the thermal conductivity of the sandy siltstone is 3×10-33cal/cm•sec•°C. The heat flow of this well is approximately 0.9×10-6cal/cm•sec. A thermal conductivity of schist in deep depth is estimated from the heat flow and geothermal gradient, and a value of 5.9×10-3cal/cm•sec•°C is obtained. For this layer the series distribution model is a good one to estimate a thermal conductivity from cuttings data.View full abstractDownload PDF (549K) -
Toyohiko YAMASAKI, Kenji ONO, Kiyobumi ONISHI1979 Volume 44 Issue 3 Pages 149-156
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSLow concentration surfactant flooding has been used as one of enhanced oil recovery methods. Recently high concentration process known as microemulsion flood has been developed in place of low concentration one. Nevertheless, it was considered to be essencial to develop effective chemicals for low concentration surfactant flooding, because of poor permeability and dirty sand of reservoir in Japan.
For this reason, in this paper, the experimental results were discussed to select effective surfactants and other additives by following methods.
The three screening procedures were adopted for selecting the effective one. The first method was shaking test, in which oil saturated specimens were sunk in aqueous solution of surfactants and shaked for two days during experiment in constant temperature bath. As the results, residual oils were washed away from cores. These oils were separated from waters and then measured the volumes.
The second and third tests were oil displacement procedures through column of sand and core.
At first, effective surfactants had been selected from many kinds of chemicals by above mentioned procedure. Their each one or its combinations were provided for second and third processes.
As the results, it was confirmed that the effective surfactants were two composited chemicals of polyoxiethylen-nonylphenol-ether, dodecylbenzenulfonicacid-calcium and polyethylenglycol-polypropylenglycolethers.View full abstractDownload PDF (856K) -
[in Japanese]1979 Volume 44 Issue 3 Pages 157-160
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSDownload PDF (351K) -
[in Japanese]1979 Volume 44 Issue 3 Pages 161-165
Published: 1979
Released on J-STAGE: March 27, 2008
JOURNAL FREE ACCESSDownload PDF (737K)
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