著者
中島 敬史
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.80, no.4, pp.275-282, 2015 (Released:2017-05-10)
参考文献数
28

This is a review of recent published papers regarding the theory of abiogenic origin of petroleum such as Kutcherov and Krayushkin (2010) “Deep-seated abiogenic origin of petroleum.” It discusses the overview of the theory and its credibility with various geological evidences, such as the presence of liquid oil and hydrocarbon gas in primary fluid inclusions in mantle derived rocks, existence of 496 basement oil and gas fields in 29 countries, and oil discoveries at ultra-deep hot temperature reservoirs.Experimental abiogenic hydrocarbon generation by CaCO3-FeO-H2O system at upper mantle ultra-high pressure condition has once been proven by several Russian and Ukrainian academic teams, such as Kenny et al. (2002). And its credibility was reconfirmed by several American academic teams such as Scott et al. (2004) during the last decade.The theory has already been applied to actual oil exploration. The Ukrainian Academy of Science achieved an extremely high success ratio of 57% through actual oil exploration with the abiogenic theory by 1990's. The exploration area in Dnieper-Donets Basin, Ukraine, had been disqualified as a prospect for a long time, due to the absence of source rocks. However, over 50 oil and gas fields have been discovered in Precambrian crystalline basement rocks and Paleozoic sedimentary rocks in the area so far.Practical applications of the abiogenic theory in explorations like the case of the Ukrinian Academy of Science are seldom performed in the world. However, the author sees that the said theory will soon be cognized as a highly effective exploration guide among oil exploration geologists.
著者
大嶋 和雄
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.56, no.4, pp.300-309, 1991 (Released:2008-03-27)
参考文献数
19

On the geological scale, earth history yields vital information concerning past environments and climates. This highlights the urgency for increased collaborative international response and research into solutions of problems posed by current climatic changes, whether natural or induced by the activities of man. Climatic changes occur on variety of timescales, ranging from catastrophic volcanic eruptions (minutes or days), through gradual changes in Earth's orbital parameters (104-106 years) to tectonically driven changes (106-108 years). It seems likely that the long-term fluctuations of climates (less than the time-scale of planetary evolution), which give rise to glacial epochs, are largely determined by continental plate distributions and movement, whilst the shorter-term fluctuations which produce glacial and inter-glacial periods in glacial epochs reflect variations in coming solar radiation.Attention is focussed on the possible existence of an anoxygenic, primeval atmosphere and on the history of atmospheric CO2. Five great biologic revolutions have occurred through earth history that have fundamentally shaped the modern geochemical picture. It is significant that organisms have controlled their own environment. Organic CO2 and calcium budget have played critical roles.
著者
西谷 正
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.75, no.4, pp.277-285, 2010 (Released:2012-03-01)
参考文献数
3

The queendom of Queen Himiko of the third century problem that becomes the national topic now. After all the subject is a problem of the location of queendom of Queen Himiko of the third century, and there are Kyushu opinion / Kinki opinion and moving from Kyushu to Kinki. The reason is because decisive evidence can lack in what do not watch an end at which opinion while having the history of the study to pass over those opinions than 280 years either. Yoshinogari site in the Kyushu opinion and Makimuku site in the Kinki opinion have important significance for each argument when I look back on history of slightly detailed study. However, for the candidate place of the grave of Himiko, the existence of Hashihaka tumulus in the Kinki opinion will work more profitably. In addition, it rises in the viewpoint of the northeast Asian history, and it may be said that that I elucidate the local actual situation of Japanese Islands each place is demanded most now.
著者
鈴木 德行 前本 健太 星野 太一
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.78, no.1, pp.16-27, 2013 (Released:2015-04-03)
参考文献数
48
被引用文献数
1 1

Change of residual hydrocarbon gases in mudstones and pelitic metamorphic rocks was investigated to evaluate the retention of methane in shale rocks during diagenesis and metamorphism. The samples were collected from borehole MITI-Mishima and outcrops in Shimanto belt, Chichibu belt, and Sanbagawa metamorphic belt exposed in Shikoku region. Concentration of residual methane normalized to total organic carbon content begins to increase when mudstone porosity reaches about 5%. The increased methane concentration at mudstone porosity less than 5% suggests a significant retention of methane in mudstone matrix. The high concentration zone of residual methane corresponds to maturity levels of vitrinite reflectance (Ro) =2 to 3%. Residual methane concentration significantly decreases in the higher maturity levels (Ro>4%), suggesting the graphitization of methane. The maturity levels of Ro=2 to 3% with the highest residual methane concentration is expected to be the favorable stage for shale gas formation, although host rock lithology such as the storage capacity and fissile nature are also related to enhanced shale gas recovery. Many parts of accretionary prism in Shimanto belt are at these maturity levels of Ro=2 to 3% favorable for shale gas formation. Accretionary prism formed under the compressional stress suggests development of gas seal structures and closed fracture systems convenient for shale gas retention, although shale rocks in Shimanto accretionary prism are comparatively poor in organic matter. Several thermogenic gas seepages in Shimanto belt would be another indication of shale gas formation in accretionary prism distributed in wide area along Pacific side of southwest Japan.
著者
小松 直幹
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.70, no.3, pp.250-258, 2005 (Released:2007-06-01)
参考文献数
11

Japan hunted oil in Manchuria before World War II. In 1927 Japanese geologist found scattered asphalt in vugs of basalt and quaternary gravel deposits on the north western shore of Hulun Nur (lake), NW Manchuria. Geological Survey of China made a check survey of the area, and found the same asphalt in 1931.After establishment of Manchukuo, geological survey, tortion balance and refraction seismograph survey, and drilling were conducted during 1932-1941. One deep well (1,114 m TD) and 21 core holes were drilled on the northern shore of the lake, but no potential oil were found.That the core hole drilled in Fuxin coal mine hit oil shows in 1938, led to extensive oil exploration program. Geological field party mapped a broad anticline located on east of Fuxin, and the core hole drilled on the anticline recovered some 30 m thick sandstones (100-200 m in depth) impregnating with oil. To explore this oil called on massive drilling campaign, and 47 or more wells were drilled on this anticline, but the reservoir quality was not good enough to establish commercial production. It is noteworthy to point out that the geologists engaged in Fuxin oil exploration thought that the oil came from Jurassic shales deposited in fresh water lake.In 1940 oil shows were found in the water wells near Chengde, and a one-month field check survey was conducted, and mapped a small anticline in Jurassic shales, but no further exploration was conducted.
著者
大賀 光太郎 板倉 賢一 出口 剛太
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.77, no.6, pp.435-437, 2012 (Released:2014-03-29)
参考文献数
1

In our laboratory, fundamental tests on underground coal gasification (UCG) by using coal blocks were conducted for several years. Last year, a small scale field test on UCG was carried out at a part of developing area of Mikasa surface mine in Hokkaido.At the field, two bore holes were drilled, one is incline bore hole and the other is vertical bore hole. The lengths of incline bore hole and vertical bore hole were about 5m and 1.4m, respectively. The vertical bore hole was used for an oxygen injection hole and ignition hole. The incline bore hole was used for a gas production hole. Some temperature sensors were installed around the incline bore hole to measure the temperature of around the production bore hole. AE sensors were also installed around the incline bore hole to estimate the gasification zone in the coal seam. Underground Coal Gasification (UCG) demands precise evaluation of the combustion area in the coal seam. Especially, the monitoring of fracture activity in the coal seam and around rock is important not only for efficient gas production but also for estimation of subsidence and gas leakage to the surface. The test was carried out for forty hours and production gases were analyzed at every thirty minutes.Experimental results obtained showed that the combustion propagated along the linking hole inside coal seam. The temperature gradients inside the coal and the composition of production gas were changed under constant oxygen flow rate. But Average thermal value of generated gases by field test was about as much as generated gases by laboratory test.
著者
阿部 正憲 斎藤 滋 棚瀬 大爾
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.76, no.6, pp.538-543, 2011 (Released:2014-01-18)
参考文献数
9

Carbon Dioxide Capture and Storage (CCS) is a key technology to reduce carbon dioxide emission to the atmosphere and needed to be widely deployed in the world as early as possible. Mainly many developed countries are advancing research, development and demonstration of CCS. The Japanese Government is also conducting an investigation for CCS demonstration project in Japan. Since 2009, field surveys have been conducted at three candidate sites. An offshore pipeline route survey was carried out at the Nakoso-Iwakioki candidate site in 2009, a preliminary survey well was drilled at the Kitakyushu candidate site in 2010, and two 3D seismic surveys were carried out and two survey wells were drilled at the Tomakomai candidate site through 2009 to 2011. A final geological evaluation is being conducted for the Tomakomai candidate site and a demonstration plan will be presented to the Government as soon as the geological evaluation has been completed.
著者
柳 小正
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.76, no.4, pp.320-327, 2011 (Released:2014-01-18)
参考文献数
29

China, which has abundant coal resources, has a size comparable of coal bed methane (CBM) resources to conventional natural gas resources in the amount of land. The development of China's CBM, which mining methods was not ever practical and economic viability was ever extremely poor, has been activated by technological advancements of countries including USA in recent years.In this paper argues that the development status and trends for CBM in China. First, we reviewed the resources status and resources distribution of CBM. Next, we explained development status and technology status. Finally, after mentioned above preferential policies and development plans by Chinese government, we examined CBM development trends. The development of China's CBM from cooperation with foreign companies, Chinese enterprises developing its own and backup by Chinese government etc. to be brought major changes for China's energy industry is considered.
著者
荒田 直 鋤崎 俊二 傳田 篤 粟島 裕治 岡田 陽
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.74, no.4, pp.350-359, 2009 (Released:2011-02-22)
参考文献数
26
被引用文献数
1 4

Japan relies on imports for the greater part of its energy needs, so that securing reliable future energy resources have become even more significant due to the recent violent fluctuation in the price of oil. In addition, as global environmental problems, such as global warming, become more serious, the need to shift to cleaner energy sources, such as natural gas, becomes more pressing. In this social context, methane hydrate, a new natural gas resource that has been confirmed to exist in the sea surrounding Japan, is expected to become a cleaner source of domestic energy in the future. “Methane Hydrate Exploitation Program in Japan” was published in July 2001 and the Research Consortium for Methane Hydrate Resources in Japan (official abbreviated title: MH21 Research Consortium) was established to oversee the completion of phase-1 of this plan. In this consortium, Engineering Advancement Association of Japan (official abbreviated title : ENAA), which is the group responsible for conducting Environmental Impact Assessment, EIA, has conducted a number of research and developed activities to establish basic technologies associated with EIA and completed almost all of aims during phase-1. In this paper, we introduce overview of our R&D about EIA which should be necessary to implement on methane hydrate production.
著者
高橋 正道
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.70, no.1, pp.37-46, 2005 (Released:2007-06-01)
参考文献数
38
被引用文献数
4 3

A new assemblage of Late Cretaceous fossil plants (the Kamikitaba assemblage) was discovered from the Ashizawa Formation of Futaba Group (Early Coniacian; 89Ma). The flora includes well-preserved mesofossils of angiosperm flowers, fruits, seeds, leaf fragments and woods.Some aspects on the origin of angiosperms and the vegetational consequences of Cretaceous and Paleogene flora are reviewed in the paper.
著者
大賀 光太郎 本位田 篤生
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.73, no.6, pp.487-495, 2008 (Released:2011-02-22)
参考文献数
9
被引用文献数
1

JCOP (Japan CO2 Sequestration in Coal Seams Project) has been commenced since JFY2002 with full subsidy from Ministry of Economy, Trade and Industry. Yuubari area of Ishikari coal field in Hokkaido was selected as the most suitable pilot test field, because the coal seams of this area are gassy and permeable.The preliminary field experiment was designed to investigate technical and economical feasibility of storing CO2 in coal seam until end of JFY2007.Injection well (IW-1) was drilled in the end of 2003, production well (PW-1) was drilled in the summer of 2004. The distance in the coal seam between the vertical injection well (IW-1) and the deviated production well (PW-1) was about 65m.CO2 injection and CH4 production tests were carried out from the end of this August to the end of October, 2007. From the measurement results, gas and water production rates were observed lower than estimated rates. The gas production rate increased gradually after carbon dioxide injection and then it reached the peak. After stopping injection, gas production rate decreased gradually to the initial gas production level. It is seems that this increase was due to the carbon dioxide injection.CO2 injection rate were also observed lower than estimated rate. History matching was carried out using the measured water production rate in 2005. From the results of history matching, these measured gas production rates were in agreement with calculation results. At that calculation, bottom of pressure of production well was 9MPa and permeability around the injection well was 0.13md. The high bottom hole pressure of production well shows that production damage is occurred. It is considered that perforation holes or cleat of coal plugged with fine coal particles might have caused this production damage. Two reasons for the decrease of permeability around injection well can be considered. One is that the gap of the coal cleats was reduced by the swelling of coal matrix due to CO2 adsorption. The other is that coal cleat was plugged by fine coal particles. From the measurement of gas content of coal in this test, it is conformed that gas content of coal seams in Ishikari coal field are in highest level. If the above mentioned problems on production damage is solved, CO2 injection into the coal seam and development of CBM will be commercialized soon.
著者
永松 茂樹
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.71, no.2, pp.205-211, 2006-03-01 (Released:2007-09-03)
参考文献数
5

Utilization of heavy crude including unconventional oil may be indispensable to cope with an increasing demand of crude oil in developing countries, such as China and India. Upgrading technologies and processes are, therefore, important for utilizing such heavy oils. In the present paper, upgrading technologies of carbon rejection and hydrogen addition processes are reviewed. Coking and SDA are focused as carbon rejection process. Hydrogen thermal cracking process based on slurry technology is focused as hydrogen addition process. Characteristics of such processes and possibility for integration of SDA and hydrogen thermal cracking are presented.
著者
渡辺 厚
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.50, no.2, pp.114-121, 1985 (Released:2008-06-30)
被引用文献数
1
著者
本村 眞澄
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.74, no.5, pp.406-413, 2009 (Released:2011-02-22)
参考文献数
4

Russia, the largest gas producing country in the world, maintains investments not only in new gas field developments in Sakhalin, Yamal Peninsula and the Arctic but also in the gas pipeline network to the new markets in Northern and Southern Europe and the Far East to cope with their increasing demand. However, at the planning stage plans of cross-border gas pipelines are facing various types of competition. Russia confronts competition of gas suppliers, for example Turkmenistan for the market of China, on the other hand Russia made China a gas-market competitor against the traditional European market, which allowed Russia to win a series of long-term sales and purchase agreements from European gas distributors. As the gas demand soars, Russia may notch a stronger position against both East and West due to its magnitude and flexibility of deliveries,which is being accomplished not through geopolitics but rather through competition in the market.
著者
須藤 斎 柳沢 幸夫 高橋 雅紀
出版者
石油技術協会
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.67, no.5, pp.501-511, 2002 (Released:2008-03-27)
参考文献数
40
被引用文献数
2 2

Diatom biostratigraphy was re-examined for the Miocene marine sequence distributed along the Arakawa River in the northern part of the Hiki Hills area, central Japan. Thirteen out of 24 collected samples yielded age diagnostic diatom fossils, which are restricted between diatom biohorizons D41 (15.7Ma) and D41.5 (15.6Ma) in the lower Denticulopsis lauta Zone (NPD 4A). A thin conglomerate layer, which is previously presumed as an unconformably overlying basal conglomerate, is sandwiched between the last occurrence (LO) biohorizon of D. praelauta (D41:15.7Ma) and first occurrence (FO) of D. ichikawae. As the maximal duration between these two biohorizons is estimated as about 20, 000 yr., it is concluded that there is no unconformity along the studied section. Temporal change in the diatom assemblage suggests a transgression in the examined interval.
著者
岩田 尊夫 平井 明夫 稲場 土誌典 平野 真史
出版者
The Japanese Association for Petroleum Technology
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.67, no.1, pp.62-71, 2002-01
参考文献数
26
被引用文献数
8 16

The Offshore Joban Basin, which constitutes the southern-most part of the forearc basins located along the Pacific coast of the northeast Japan, extends about 170 km in NNE-SSW direction with 50 km width. The Upper Cretaceous and younger sediments distribute widely with maximum thickness of more than 5,000 meters. The Iwaki-oki gas field located in the Offshore Joban Basin, which is the only commercial offshore gas field in the Pacific Ocean off northeast Japan, has been producing gas since 1984. The Paleogene and Maastrichtian coals and coaly mudstones, deposited in a confined basin along continental margin, are the most likely source rocks of the gas. The basin modeling simulation in the basin depo-center west of the gas field estimates present vitrinite reflectance (Ro) values at the source rock horizon to be in the range from 1.0 to 1.3%. The simulation also indicates that maturation of the source rocks were accelerated by rapid subsidence since Miocene, and that peak gas generation and expulsion occurred during middle Pliocene. Therefore, the basin depo-center is considered as the kitchen area. Main reservoirs are the shallow marine sandstones intercalated in the Lower Miocene and the basal part of the Oligocene. The former is the producing reservoir of the Iwaki-oki gas field. Both sandstones are sealed by the extensive and thick mudstones. Primary hydrocarbon traps are NNE-SSW trending anticlines, which were formed before Middle Miocene. These anticlines are cut by NNE-SSW trending faults at their flanks. As the reservoir sandstones are about 2,000 meters vertically apart from the source rocks in the kitchen area, it is considered that expelled hydrocarbon migrated vertically through faults. Although forearc basins are not generally considered to be prospective for hydrocarbon exploration, there could be relatively good hydrocarbon system existing as shown above in the Offshore Joban Basin.
著者
山崎 豊彦 ロセス S.A. 金子 正紀 ケービン N. 内藤 健一
出版者
The Japanese Association for Petroleum Technology
雑誌
石油技術協会誌 (ISSN:03709868)
巻号頁・発行日
vol.59, no.3, pp.216-226, 1994
被引用文献数
1

この研究は水蒸気攻法で, オイルサンドからビチューメンを回収した後, さらにビチューメンを回収する方法として, 水蒸気にヘキサンや石油ベンジンのような軽質炭化水素を利用する方法について研究したものである。ここに報告したのは温度250°Cおよび300°Cの水蒸気に上記の溶剤を加え, その回収実験を行ったもので, 16の実験結果について, 水蒸気のみで10時間回収を行った場合, 始めの5時間は水蒸気で回収を行い, その回収がほぼ完了したと見られる5時間後から, ヘキサン, 石油ベンジンを水蒸気のほぼ2%程度混入した場合の回収率について検討した。この結果, 石油ベンジンを混入した場合はヘキサン混入の場合より大量のビチューメンを生産し, 300°Cの場合, その回収率は最大で56.6%となった。