首页> 中文期刊> 《石油勘探与开发:英文版》 >A quantitative evaluation for well pattern adaptability in ultra-low permeability oil reservoirs: A case study of Triassic Chang 6 and Chang 8 reservoirs in Ordos Basin

A quantitative evaluation for well pattern adaptability in ultra-low permeability oil reservoirs: A case study of Triassic Chang 6 and Chang 8 reservoirs in Ordos Basin

         

摘要

Based on the previous studies and development practice in recent 10 years, a quantitative evaluation method for the adaptability of well patterns to ultra-low permeability reservoirs was established using cluster analysis and gray correlation method, and it includes 10 evaluation parameters in the four aspects of optimal evaluation parameters, determination of weights for evaluation parameters, development stage division, and determination of classification coefficients. This evaluation method was used to evaluate the well pattern adaptability of 13 main ultra-low permeability reservoirs in Triassic Chang 6 and Chang 8 of Ordos Basin. Three basic understandings were obtained: Firstly, the well pattern for ultra-low permeability type-I reservoirs has generally good adaptability, with proper well pattern forms and well pattern parameters. Secondly, square inverted nine-spot well pattern is suitable for reservoirs with no fractures;rhombic inverted nine-spot injection pattern is suitable for reservoirs with some fractures;and rectangular well pattern is suitable for reservoirs with rich fractures. Thirdly, for the ultra-low permeability type-Ⅱ and type-Ⅲ reservoirs, with the principles of well pattern form determination, the row spacing needs to be optimized further to improve the level of development of such reservoirs.

著录项

  • 来源
    《石油勘探与开发:英文版》 |2018年第3期|P.499-506|共8页
  • 作者单位

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

    [1]Exploration and Development Research Institute of PetroChina Changqing Oilfield Company;

    Xi’an 710018;

    China;

    [2]National Engineering Laboratory for Exploration and Development of Low-permeability Oil & Gas Fields;

    Xi’an 710018;

    China;

  • 原文格式 PDF
  • 正文语种 CHI
  • 中图分类 油田布井原则及方式;
  • 关键词

    ultra-low permeability oil reservoir; well pattern adaptability; comprehensive evaluation parameter; Ordos Basin; Triassic; Chang 6 Formation; Chang 8 Formation;

    机译:超低渗透油藏井网适应性综合评价参数鄂尔多斯盆地三叠系长6组长8组;
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