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  • IOP Publishing  (2)
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  • IOP Publishing  (2)
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  • 1
    Online Resource
    Online Resource
    Analysis of Characteristic of Meteorological Variables in Golmud, China during 1955-2015 and Prediction of its Future Change
    IOP Publishing ; 2020
    In:  IOP Conference Series: Earth and Environmental Science Vol. 598, No. 1 ( 2020-11-01), p. 012052-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 598, No. 1 ( 2020-11-01), p. 012052-
    Abstract: Global warming and its impact on socio-economic and eco-environment in the more drought-prone regions have attracted great attention. Arid regions account for about 30% of the total China’s land area, which are quite sensitive and vulnerable to climate change. The annual trends of three meteorological variables were analyzed in Golmud City during 1955-2015. The linear regression, cumulative anomaly and R/S methods were used to determine the characteristics of the meteorological variables. The Morlet wavelet transforms method was employed to detect the dynamic periodic features of the meteorological variables. The results were obtained as follows: 1) the significant increasing trends were indicated in both temperatures (0.5°C/10a, p 〈 0.01) and precipitation (3.3mm/10a, p 〈 0.05), the decreasing trend in evaporation (118.4mm/10a, p 〉 0.05). This states that the climate of Golmud City was turned from cold-dry to warm-wet. 2) The Hurst indexes of each annual variable were all greater than 0.5, it suggested that there would be obvious Hurst phenomenon in the future. 3) The wavelet analysis revealed that the temperature, precipitation, evaporation, had the periods of 12-14a, 7-9a, 11-12a oscillations, respectively. 4) According to the analysis results by synthesis we can predict that there will still keep the warming and increasing trend of temperature and precipitation in the future. In general, the results of using the Mann-Kendall and R/S proved the good consistency in detection of the trend for temperature and precipitation. This study can be used as a reference for further analysis of climate as well as the impacts of climate change. More importantly it can provide theoretical support for context-specific plan for water resources development and agricultural and animal husbandry production in Golmud City.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/598/1/012052
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2434538-6
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Optimization of Multi-stage and Multi-cluster Fracturing Technology for Horizontal Wells in Jilantai Buried Hill
    IOP Publishing ; 2021
    In:  IOP Conference Series: Earth and Environmental Science Vol. 634, No. 1 ( 2021-02-01), p. 012142-
    Details
    In: IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 634, No. 1 ( 2021-02-01), p. 012142-
    Abstract: The Jilantai oil field is rich in reserves of metamorphic rock potential reservoirs, Some wells drilled in the early stages, recorded wells see better oil and gas display, but the oil test yield is low, so it needs fracturing to put into production. Conventional fracturing has a small range, low output and short stable production period. In order to improve the effect of reservoir reconstruction, multi-segment and multi-cluster fracturing technology for Jilantai metamorphic rock horizontal wells has been developed.. According to the well trajectory and logging interpretation results of well s1-1, we have formed a volume fracturing mode of large-scale +large displacement + low sand ratio plug-in plus sand by optimizing the staged cluster perforation scheme, fracture pattern scale and operation parameters, thus communicating more natural fractures and forming a complex fracture network system. The well is divided into 10 sections and 28 clusters of fracturing, after pressure of 49.2t daily oil, 31.49t of daily oil, the current production is stable, the effect of fracturing increase yield is remarkable. Through the successful application of multi-stage and multi-cluster fracturing technology in this well, a new technology of volume fracturing for metamorphic reservoir in Jilantai formed, which lays a foundation for the efficient development of this area.
    Type of Medium: Online Resource
    ISSN: 1755-1307 , 1755-1315
    URL: Article
    DOI: 10.1088/1755-1315/634/1/012142
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2434538-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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