石油技術協会誌
Online ISSN : 1881-4131
Print ISSN : 0370-9868
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63 巻 , 2 号
選択された号の論文の9件中1~9を表示しています
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  • 寒河井 正, 青山 栄享
    63 巻 (1998) 2 号 p. 105-110
    公開日: 2008/03/27
    ジャーナル フリー
    It has been a long time dream of Japan Petroleum Explolation Co., LTD (JAPEX) and local energy sectors to have a large oil and gas field in Hokkaido. In Hokkaido, nearly a hundred wildcats have been drilled by JAPEX since late 1950's. In 1988, JAPEX finally discovered a large gas field by the well “Minami-Yufutsu SK-1” which is located a few kilometers northeast of Tomakomai-City. Since then, JAPEX has drilled ten wells and discovered three gas pools. The field is now called Yufutsu Gas Field.
    Though there were some technical difficulties in drilling, analizing reservoir performance and handling waxy oil to develop this field, the field was successfully developed in 1996 by applying some cutting edge technologies and some new concepts.
    This lecture briefly outlines how those difficulties were overcome.
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  • 小渕 晶男
    63 巻 (1998) 2 号 p. 111-120
    公開日: 2008/03/27
    ジャーナル フリー
    For a service company, the most important role of new technologies is to contribute to improving the profitability of the oil company by reducing operating costs and increasing operating efficiency. Several new technologies recently developed by Schlumberger, along with their applications, are discussed in this lecture.
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  • 岡 光二
    63 巻 (1998) 2 号 p. 121-127
    公開日: 2008/03/27
    ジャーナル フリー
    In 1995, the electric utility industry law was amended after the interval of 31 years. As deregulation of power wholesale, a bidding system of power generations was newly introduced and IPP (independent power producer) business started. In 1996, the first bidding was held and a hundred projects (10, 810MW) applied to six electric power companies. And in 1997, ninety two projects (14, 250MW) applied to seven electric power companies. Five projects using natural gas for fuel won the bidding.
    Osaka Gas Co., Ltd. won the bidding by Kansai Electric Power Company. A power generating system of the Osaka gas project comprises a gas turbine combined cycle system and an expansion turbine generator. This system performs high energy efficiency (51%) as well as the latest large size power station. And it is friendly to environment in terms of air pollution. Since natural gas does not contain sulfur originally, sulfur dioxide is not emitted. A low NOx combustion system and a denitration plant can reduce the amount of nitrogen oxide emission.
    In the future, power generations by IPP will increase in Japan. Also, Japanese gas companies will develop their business in Southeast Asia where its energy demand is increasing.
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  • 岡田 行夫
    63 巻 (1998) 2 号 p. 128-134
    公開日: 2008/03/27
    ジャーナル フリー
    Top management who deals with strategy making are in the forties, with good knowledge of geoscience/petroleum engineering and the experience of commercial and financial areas. They have run one of the core assets of the company as the operator. They understand the importance of the technological advances and the protection of the environment. Key assumption they make are steady demand growth of oil and gas and stable oil price (15-20$/bbl). Also they are excited of the new grand opening of business opportunities such as Former Soviet Union and South America.
    Currently, the features of their strategies are the management of reserves including purchase or disposal of the fields, the optimization of exploration, development & production, the geographical spread of their assets, merge & acquisition and the pipe line business. The emphasis upon gas venture (field development, LNG, IPP etc., ) is in line with the growing environmental consciousness and consumer's power. The alliance is either partnership of similar companies or different ones. The former mainly aims at streamlining and the latter, complementing. Anyhow it is “give & take” process. Owing to the information technology, the leaner organization becomes possible and contributes to speedy decision making and drastic cost cutting.
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  • 真殿 達
    63 巻 (1998) 2 号 p. 135-144
    公開日: 2008/03/27
    ジャーナル フリー
    The scope of project financing stretches far beyond what it used to be the case. This is primarily because PF has been actively utilized for various types of infrastructure development projects. Formerly PF was the financing of special nature applied for big-projects like natural resource development.
    The introduction of PF to infrastructure business was the result of deregulation of public utilities in the UK and the US. When this deregulation-oriented public utilities business reached a certain saturation point, it started overflowing into the emerging markets, where BOT type utilities business was badly in need. In such countries as fast growing Asian economies, the demand for infrastructure was too big to be satisfied with the only government spending and had to depend upon foreign direct investment to meet public services required for growth.
    In the early stage of privatized infrastructure build-up, it provided a lot of room to accommodate for every participant to make relatively thick profit. However, recently the business climate has drastically changed due to increasing competition. Disproportionately to the size of profit, which seems to continue to decline, risks to which foreign participants are exposed have been increasing. Competition also penetrates into financing. There appear a number of financial facilities available to good projects. This, in turn, has weakened bargaining positions of financiers.
    Though in terms of quantity both Japanese financial institutions and enterprises are big players in the world of PF, as for substance like making deals at the driver's seat, they still remain minor players. This may be the very reflection of the Achilles' heel of the problematic Japanese system, which has been being raised with respect to the protracted recession and financial crisis.
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  • 鶴 哲郎, 太田 賢治, 小澤 岳史
    63 巻 (1998) 2 号 p. 145-157
    公開日: 2008/03/27
    ジャーナル フリー
    Specifying a drilling bit location on the seismic section is required for a safety drilling as well as a proper steering of the well. Seismic While Drilling (SWD) is a seismic survey using a working drill-bit as an energy source. This technology is cost effective and can give us information of the subsurface structures with real time. However, the signal to noise ratio is lower than VSP which is a seismic survey with the same objective as SWD. With several field experiments, we have increased the accuracy of SWD by an appropriate receiver configuration, utilizing stacking process and so on. This paper discusses relations between quality of SWD data and some factors reducing it.
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  • 山本 正伸, 鈴木 祐一郎, 榎本 稔, 梶原 義照, 武田 信從
    63 巻 (1998) 2 号 p. 158-164
    公開日: 2008/03/27
    ジャーナル フリー
    A thermogravimetric analysis (TGA) and a Rock-Eval pyrolysis (RE) were applied to estimating the shale oil content (oil yield) in 26 oil shales from the Dsunbayan Group, Mongolia.
    The weight loss during 211-505°C (WL2-WL1) by TGA and the generation potential (S1+S2) of RE are well correlated with the Fischer assay (FA) oil yield, with the following formulae, respectively.
    WL2-WL1 (wt%)=0.720×{FA oil yield (wt%)}+2.55
    S1+S2 (mg/g)=12.4×{FA oil yield (wt%)}-1.49
    The oil yields estimated from TGA weight loss and RE generation potential both have small deviations (mostly within 1wt%) from the FA values. These estimations can be effectively applied as easy and inexpensive methods to estimate oil yields of large number of oil shale samples.
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  • 吉岡 克平, 島田 伸介, 松岡 俊文
    63 巻 (1998) 2 号 p. 165-177
    公開日: 2008/03/27
    ジャーナル フリー
    In reservoir characterization, 3-D seismic data have been used as soft data for geostatistical analysis. The reason is that the seismic data is acquired uniformly in the reservoir area. On the contrary, the well data are located limitedly. The one advantage of using seismic data is that the information of spatial variation can be easily derived. The second one is that we can reduce the uncertainty in geostatistical analysis, conditioned by the cross relationship between the reservoir property and the seismic data.
    The estimation variance in cokriging is less than that in kriging because of that cross relationship. In the case study using two oil fields, the estimation variances in kriging and in cokriging were compared with the errors between the actual data and the estimation by cross validation tests. In general, the errors evaluated in cokriging were less than that in kriging. But it was found that the large dispersion between the actual data and the estimation can occur, in the case of hiding the well data which has an effect on priori statistics, and in the case of using only small number of well data. In that case, the estimation variances in cokriging had been underestimated. When only poor sample data are available, the reduction of uncertainty in cokriging seems to be unreliable.
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  • 小林 啓一
    63 巻 (1998) 2 号 p. 178-179
    公開日: 2008/03/27
    ジャーナル フリー
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