• Title, Summary, Keyword: 가채량

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Analysis on Survey, Exploration and Development Policy and Technology of China : Focused on Shale Gas Resources (셰일가스 자원을 중심으로 한 중국의 에너지·광물자원 조사·탐사·개발 기술 정책분석)

  • Lee, Jae-Wook;Kim, Seong-Yong;Ahn, Eun-Young;Park, Jung-Kyu
    • Economic and Environmental Geology
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    • v.47 no.3
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    • pp.291-302
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    • 2014
  • The Chinese government and its agencies were trying in order to solve the unstability of resource supply and demand. Ministry of Land and Resources of China(MLR) carried out a lot of national-level policy and planning for estimating the domestic mineral and energy resources potential and recoverable reserves, as the Chinese land and resources survey plan(1999~2010), the Chinese mineral resource survey and exploration plan(2008~2020), announcement for shale gas industry policies of China, the Chinese shale gas resources evaluation and selection project for its development priority areas(2012), and the plan for Chinese shale gas development(2011~2015). The two large sedimentary basins of Chinese shale gas reserves are Sichuan and Tarim basins with excellent potential, accounting for majority of the estimated national reserves. Recoverable gas-bearing shale of China was surveyed to be widespread. The volume of recoverable shale gas reservoirs in China has been estimated to be around 31 trillion cubic meters(1,115 trillion cubic feet). China is one of only three countries with the US and Canada to produce shale gas in commercial quantities. China is concentrating on technology development to enhance commercial production of shale gas, and on survey and exploration activities to increase its recoverable reserves. The trends related to shale gas development and R&D activities in China to respond to changes in international oil market should be actively monitored based on analysis of Chinese policies and technology.

천연가스의 수급동향과 전망

  • Korea Petroleum Association
    • Korea Petroleum Association Journal
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    • no.9
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    • pp.62-65
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    • 1983
  • 세계 LNG 생산량은 최근 2년간 큰 변동이 없다 82년의 경우 전년비 1.6%감소했으나 이는 81년도 생산증가율보다는 다소 낮은 수치이다. 가채확인 매장량은 지난 해 3.6%증가했으며, 지난 5년간 누계로는 32.4%나 늘어났다. 그러나 이들 통계이면에는 가스소비의 지역적 격차와 구조적 변화가 크게 나타나고 있다. 가스는 정체된 세계시장에서 연료로서의 위치를 확고히 하고 있으나. 타연료와의 경쟁력이 약해 시장확대는 이루어지지 않고 있다.

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대체에너지 개발보급계획

  • 이인영
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • pp.3-35
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    • 2003
  • o 주요에너지원별 가채매장량 - 원유 : 40년분 1조 500억 배럴 - 석탄 : 208년분 9,842억톤, -천연가스 : 62년분 1,130억톤, - 우라늄 : 50년분 318만톤으로 추정 *자료 : 원유, 석탄, 천연가스 BP 2002, 우라늄 IAEA 2001, 부존자원이 없는 우리나라의 경우, 기술개발에 의해 확보 가능한 대체에너지에 대한 개발 및 보급이 절실(중략)

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Analysis on the Ore Recovery from Operating the Room & Pillar Hybrid Mining Method in the Korean Limestone Mine (국내 석회석 광산에서 주방식하이브리드 채광법의 채수율 분석)

  • Kwon, Dukjoon;Kim, Jaedong
    • Tunnel and Underground Space
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    • v.27 no.3
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    • pp.161-171
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    • 2017
  • Demand for high-grade limestone is increasing, but the production in the domestic mines has been limited due to the lack of systematic development plans and efforts to develop mining technology to improve the recovery ratio, transition to high-cost underground mining due to increasing social awareness of environmental protection, and the smallness of the domestic mining industry, etc. In this study in connection with this issue, an analysis on the recovery change by improvement of mining method was executed. 3D modeling technique was used to construct a 3D model. 3D model includes the geological structure, the limestone ore body and the underground pits and tunnels excavated at the Daepyeong District of Daesung MDI Donghae District. By using the 3D model, measured resources, reserves and ore recovery were evaluated from the results of pilot operation of the room and pillar hybrid mining method, which is a variant of room and pillar mining method. These results were compared with those obtained from the conventional mining method. The ore recovery obtained by hybrid mining method was found to be up to 71.6%, showing about 26%p. increase compared with the case of conventional mining method.

[Retraction] The Evaluation of Lithium Bearing Brine Aquifer Systems (2) (The Investigation Method and Estimate of Lithium Deposits) ([논문 철회] 리튬 함유 고염수체(Brine Aquifer System)의 자원 평가 (2) (리튬광상의 가채량 조사와 산정방법))

  • Hahn, Jeongsang;Lee, Juhyun;Lee, Kwangjin;Hahn, Chan;Ahn, Gyucheon
    • Journal of Soil and Groundwater Environment
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    • v.23 no.5
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    • pp.1-16
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    • 2018
  • Recent development of lithium ion batteries for vehicles industries have led to a boom in lithium exploration and development for the new generation of batteries. One of the cheapest sources of lithium is the brines hosted in the aquifers of the arid intermontane-closed salar basins. Because the resource is a fluid, with the attendant problems of in-aquifer mixing, reorganization, and lower recovery factors compared with most metalliferous and industrial mineral deposits due to reliance on pumping of the brine from wells for extraction, existing codes for filing resource and reserve estimates require new approach for these prospects. Evaluation of brine resources is complex and requires participation of a variety of qualified experts such as hydrogeologists, geologists, geochemists and chemical engineers. The technical reports disclosing the results of these estimates should reflect the inputs of multi-disciplinary approaches. The requirements for brine resource and reserve evaluation, drawing on several examples from the experiences in the Central Andes are reviewed in this paper.

Probabilistic Prediction of Estimated Ultimate Recovery in Shale Reservoir using Kernel Density Function (셰일 저류층에서의 핵밀도 함수를 이용한 확률론적 궁극가채량 예측)

  • Shin, Hyo-Jin;Hwang, Ji-Yu;Lim, Jong-Se
    • Journal of the Korean Institute of Gas
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    • v.21 no.3
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    • pp.61-69
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    • 2017
  • The commercial development of unconventional gas is pursued in North America because it is more feasible owing to the technology required to improve productivity. Shale reservoir have low permeability and gas production can be carried out through cracks generated by hydraulic fracturing. The decline rate during the initial production period is high, but very low latter on, there are significant variations from the initial production behavior. Therefore, in the prediction of the production rate using deterministic decline curve analysis(DCA), it is not possible to consider the uncertainty in the production behavior. In this study, production rate of the Eagle Ford shale is predicted by Arps Hyperbolic and Modified SEPD. To minimize the uncertainty in predicting the Estimated Ultimate Recovery(EUR), Monte Carlo simulation is used to multi-wells analysis. Also, kernel density function is applied to determine probability distribution of decline curve factors without any assumption.

A Review on World Geothermal Assessment (전세계 지열부존량 평가에 대한 개관)

  • Song, Yoon-Ho;Lee, Young-Min;Lee, Tae-Jong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.613-616
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    • 2008
  • Assessment of geothermal resources like other earth resources is a starting point for decision makers or stakeholders to set up basic plan on its development and R&D policies. In this context, there have been various works on world geothermal assessment, to report different estimates from each other. In this paper, we first introduce the definition of geothermal potential mainly adopted from the article by Muffler and Cataldi (1978) and then summarize the estimates made so far referring the work by Bertani (2003). An updated estimates by Stefansson (2005) are also reviewed in terms of identified resources separately for high-temperature resources for power generation and low-temperature ones for direct-use. Recent estimate of US geothermal resources by MIT (2006) using a volumetric method with extensively accumulated data base is discussed. Finally, we introduce the first geothermal assessment in Korea recently made and discuss its importance.

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A Study on the Selection of Borrow Pits by Using VE Techniques (VE 기법을 이용한 토취장 선정에 관한 연구)

  • Kim, Seung-Ki;Lee, Byung-Suk;Yang, Jae-Hyouk;Lee, Jong-Cheon;Kim, Chan-kee
    • Journal of the Korean Geosynthetics Society
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    • v.15 no.1
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    • pp.59-70
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    • 2016
  • The purpose of this study is to review that the VE techniques can be used as a selection tool of borrow pit locations. The analysis of the soil investigation report is performed for the selection of proposed borrow pit site on a large-scale residential development area. Possible earthwork volume of mining is estimated and the weighting matrix evaluation is applied to the VE techniques. After determining the evaluation items for VE assessment, important degree was calculated. The Rating and evaluation of performance is carried out on a proposed borrow pit site. And, development priority has to be decided for a proposed borrow pit sites. As a result, the relative construction cost is closely related to the haulage distance. As the haulage distance increases, the relative construction cost will be increased. Therefore, it was confirmed quantitatively that haulage distance has a significant impact on the select of borrow pits. Also, it was found that the condition of borrow pits itself is important, but it cannot be ignored the impact of the life cycle cost for the selection of optimal borrow pit sites.

Metal Mines and Supply-Demand of Metal Commodities in Korea (한국의 금속광산과 주요 금속자원수급)

  • 김영인
    • Proceedings of the KSEEG Conference
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    • pp.209-212
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    • 2003
  • 한국의 금속광산은 일제시대에 금광산을 중심으로 본격적으로 개발되어 1943년 산금령시에 1,522개 광산이 가행되었다. 최근까지 1990개 광산이 개발된 것으로 알려지고 있으며 2002년 말 현재 7개 광산만이 가행되었다. 1960년대까지 국내 광산은 금, 은 동, 연아연, 철, 중석 등을 중심으로 활발히 가행되어 주요 외화 획득원으로 중요한 위치를 차지하였다. 그 이후 산업발전에 따라 수요는 증가세를 보인 반면 가행광산과 생산량은 매년 감소하여 최근 금속광물자원 자급도는 0.21%로 미미한 수준이며 수요의 대부분을 해외에 의존하고 있다. (중략)

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Study on Production Performance of Shale Gas Reservoir using Production Data Analysis (생산자료 분석기법을 이용한 셰일가스정 생산거동 연구)

  • Lee, Sun-Min;Jung, Ji-Hun;Sin, Chang-Hoon;Kwon, Sun-Il
    • Journal of the Korean Institute of Gas
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    • v.17 no.4
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    • pp.58-69
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    • 2013
  • This paper presents production data analysis for two production wells located in the shale gas field, Canada, with the proper analysis method according to each production performance characteristics. In the case A production well, the analysis was performed by applying both time and superposition time because the production history has high variation. Firstly, the flow regimes were classified with a log-log plot, and as a result, only the transient flow was appeared. Then the area of simulated reservoir volume (SRV) analyzed based on flowing material balance plot was calculated to 180 acres of time, and 240 acres of superposition time. And the original gas in place (OGIP) also was estimated to 15, 20 Bscf, respectively. However, as the area of SRV was not analyzed with the boundary dominated flow data, it was regarded as the minimum one. Therefore, the production forecasting was conducted according to variation of b exponent and the area of SRV. As a result, estimated ultimate recovery (EUR) increased 1.2 and 1.4 times respectively depending on b exponent, which was 0.5 and 1. In addition, as the area of SRV increased from 240 to 360 acres, EUR increased 1.3 times. In the case B production well, the formation compressibility and permeability depending on the overburden were applied to the analysis of the overpressured reservoir. In comparison of the case that applied geomechanical factors and the case that did not, the area of SRV was increased 1.4 times, OGIP was increased 1.5 times respectively. As a result of analysis, the prediction of future productivity including OGIP and EUR may be quite different depending on the analysis method. Thus, it was found that proper analysis methods, such as pseudo-time, superposition time, geomechanical factors, need to be applied depending on the production data to gain accurate results.