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
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
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 1

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
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

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
西 弘嗣 高嶋 礼詩
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.6-14, 2005 (Released:2007-06-01)
参考文献数
55
被引用文献数
1

The Indian subcontinent and Asian continent first contacted in the late Cretaceous (about 65Ma) and strongly collided after 52 Ma that is evidenced by slowed northward motion of the Indian Subcontinent from 18-20cm/yr to 4.5cm/yr. Although the first record of uplift in Himalayan regions has been recorded during the Eocene, major uplifts of the Himalayan Range and Tibetan Plateau and the subsequent sediment supply started from the Oligocene through Miocene. Particularly, the rapid uplift stages of Himalayan-Tibetan regions have been recognized, at least, around 8Ma and the last 1Ma based on sedimentological and paleonbotanical studies of marine and terrestrial sequences. The micropaleontological studies in marine sequences revealed that the increased elevations in the Himalayan-Tibetan regions forced a strong monsoonal circulation about 8 Ma, which produced intense upwelling around the Arabian Sea and more seasonal climate changes of terrestrial sequences around the southern Asia. The hypothesis that uplift of plateaus and mountains caused large-scale climate changes during the Cenozoic is still unknown. However, an enhanced chemical weathering due to tectonic uplift in the Himalayan-Tibetan regions may be explained as the active driving force of the Cenozoic global cooling at the beginning of 50 Ma.
著者
早稲田 周 岩野 裕継
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.72, no.6, pp.585-593, 2007 (Released:2008-11-14)
参考文献数
22
被引用文献数
10 5 10

Carbon isotope compositions of methane, ethane and propane, and hydrocarbon ratios in gas samples provide information of their origin (microbial vs. thermogenic), maturity of thermogenic component, compositional change due to migration, and extent of biodegradation. Mixing of gases with different origins or different maturities can also be evaluated using gas isotopic and molecular compositions. While these gas geochemical data have been used mainly for petroleum exploration, their applications for development, production and operation issues are also increasing. Headspace gas analyses can be used to delineate reservoir compartments and pay zones. Carbon isotope compositions in commingled production could be used to allocate contributions form individual production zones if isotopic differences exist between the gases from the contributing reservoirs. Origin of gas seepage in production sites could be investigated by the gas molecular and isotope compositions if enough reference data exist in the area.
著者
林 雅雄 稲盛 隆穂 佐伯 龍男 野口 聡
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.1, pp.42-53, 2010 (Released:2012-03-01)
参考文献数
32
被引用文献数
8 6 1

The Japanese Government has acquired regional reconnaissance seismic data in territorial waters since 1969 to evaluate the country's hydrocarbon potential. Total length of seismic lines is about 100,000 km and many surveys cover relatively deep water areas where gas hydrate stability zone (GHSZ) is expected to exist. BSRs related to methane hydrates in the offshore areas surrounding Japan were studied jointly by the group comprised of JNOC (at present, JOGMEC) and 10 private sectors based on these archived seismic data, and the areal extent of BSRs was reported to be 44,000 km2 in 2000.The country's research into methane hydrates has been accelerated since 2001 by establishment of the research consortium (MH21) under administrative guidance of METI. To investigate into methane hydrate, extensive 3D seismic surveys were conducted in the eastern Nankai Trough and many LWD wells were drilled there. Through the exploration campaign, certain new knowledge on seismic attributes related to the concentration of methane hydrates was obtained. In the light of this advanced knowledge about the appearance of BSRs, MH21 has decided that the archived seismic data should be investigated for the comprehensive understanding of methane hydrates as the potential future energy resources. Old seismic data processed suitably for loading in a “work station” was interpreted in the sophisticated system, though the volume of them was very limited.A method of high density velocity analysis was applied to the seismic data which recorded clear BSR appearing at abnormally shallow depth as 200msec below the sea floor in the Sea of Japan and in the Sea of Okhotsk, comparing to 500 to 700 msec in the Pacific side. This may represent that the geotectonic setting of the Japanese Islands controls GHSZ and this understanding seems to be important for the future exploration of MH.Present study has revealed that the areal extent of BSRs in offshore Japan is 122,000 km2.
著者
市川 真
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.3, pp.234-242, 2009 (Released:2011-02-22)
参考文献数
12

While conventional oil and gas production is expected to hit a peak in dozens of years, the world still requires hydrocarbons as the main source of energy. The need to fill the gap between supply and demand, and the recent high oil price, have aroused enthusiasm for unconventional oil and gas. But, the development of them is, full of ups and downs.The extra heavy oil boom began in early 2000's, when large projects started in Canada and Venezuela. But, rising plant cost, shortage of skilled workers, and environmental concerns have increased uncertainty of those projects, and finally this year global economic crunch and oil price plunge ended the boom. In those circumstances, technologies to reduce production cost are keenly craved and several are on trial in actual projects.In 2005, U.S. Congress directed the Bureau of Land Management to manage oil shale development on public lands. By 2008, the bureau issued six research development and demonstration leases that will allow oil shale development to resume on a 160-acre tract of public land. Currently, in-situ conversion process is arguably the most cost effective recovery method.The U.S. has led the world in coalbed methane (CBM) development, and the production reached 1.8 tcf by 2006. While some countries are after the footsteps of the U.S. in CBM development, the U.S. is now considering giving a higher priority to shale gas instead as the results of efforts to develop economical production methods for years.Japan has studied gas hydrate development since 1990's. In 2008, the Japan Oil, Gas and Metals National Corporation carried out a successful gas hydrate production test in Canada. The next step of their pursuit will include practical application of the production method, nationwide potential evaluation, and development of environmental assessment technique.
著者
吉田 肇 高西 哲朗 根本 哲也
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.432-436, 2009-09-01

INPEX Browse Ltd. has drilled 6 wells in the Browse Basin in order to appraise the production permit WA-285P from 2000 through 2004 (at the 1st and 2nd Drilling Campaign). All of wells have encountered stuck pipe problems while drilling the unconsolidated Grebe formation sandstone and they have provided a lot of Non Productive Time (NPT) due to fishing or sidetrack. According to the desk top study of Grebe, which was performed after drilling in 2004, it was concluded that the stuck pipe problems result from the collapse of unconsolidated sand, in other words, such collapse is caused by the absence of an effective filter cake capable of stabilizing the well bore. Eventually, INPEX Browse Ltd. has decided to drill the unconsolidated Grebe formation sandstone by closed circulation system using drilling mud instead of Seawater.<br>In order to achieve this objective, Riserless Mud Return (RMR) system was introduced by AGR (Norwegian Company) before 3rd Drilling Campaign. Through this system, all three (3) wells have been successfully drilled without any hole collapse and no NPT was recorded. That is a major improvement rather than last two (2) drilling campaign and RMR system was demonstrated as one of an effective procedure to drill unconsolidated formation in Browse Basin.