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Hierarchy Analysis for Flow Units Division of Low-Permeability Reservoir: A Case Study in Xifeng Oilfield, Ordos Basin

机译：低渗储层流单元划分的层次分析-以鄂尔多斯盆地西峰油田为例

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摘要

The Chang 8 Member of Yanchang Formation in Xifeng Oilfield is deposited by delta front, and the mircofacies contains distributary channel, mouth bar, sheet sands and interdistributary bay. The reservoirs within the Chang 8 Member are characterized by strong heterogeneity, great lateral change of facies and low permeability with a value of 0.1-10mD. It is significant for the effective development of these low-permeability reservoirs to divide the flow units accurately. Base on the principle that flow units are controlled by macroscopic sedimentation and microscopic petrophysics, a hierarchy analysis for flow units division was proposed. The reservoir unit can be subdivided into three hierarchies which comprises genetic unit, architectural unit and flow unit. Macroscopically, genetic unit is designated by sequence stratigraphic interpretation, and architectural unit is delineated within genetic unit by reservoir architecture analysis. Microscopically, flow unit is defined within architectural unit by petrophysical parameters measurement. The method was applied to divide flow units of low permeability reservoirs within the Chang 8 Member of Xifeng Oilfield. It was shown that the flow unit of type A and B with good development potential dominantly locate in the main part of distributary channel and mouth bar, and the flow unit of type C with poor development potential mainly locates in sheet sands, edges of mouth bar and distributary channel. The study indicates that the flow units are identified by the method which reflects macroscopic characteristics of sedimentation, as well as microscopic details of petrophysical properties.
机译：西峰油田延长组长8段以三角洲前缘沉积，微相含分流河道，口坝，板状砂岩和分流湾。长8段内的储集层具有非均质性强，岩相侧向变化大，渗透率低等特点，其储层值为0.1-10mD。对这些低渗透油藏的有效开发对准确地划分流动单元具有重要意义。基于宏观沉降和微观岩石物理学控制流动单元的原理，提出了流动单元划分的层次分析法。储层单元可以分为三个层次，包括遗传单元，建筑单元和流动单元。在宏观上，通过层序地层学解释指定遗传单元，并通过储层构造分析在遗传单元内划定构造单元。在微观上，通过岩石物理参数测量在建筑单元内定义流动单元。将该方法用于西峰油田长8段内低渗透油藏的流动单元划分。结果表明，具有良好发展潜力的A，B型流动单元主要分布在分流道和口岸的主要部分，具有发展潜力的C型流动单元主要位于板状砂，口岸的边缘。和分销渠道。研究表明，通过反映沉积物的宏观特征以及岩石物性的微观细节的方法确定了流动单位。

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  • 来源
    《Energy Exploration & Exploitation》 |2010年第2期|P.71-86|共16页
  • 作者

    Mingsheng Lv; Kaiyuan Chen; Liangqing Xue; Yongdi Su; Ran Li;

  • 作者单位

    Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China School of Energy Resources, China University of Geosciences, Beijing 100083, China;

    rnSchool of Energy Resources, China University of Geosciences, Beijing 100083, China;

    rnResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China;

    rnResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;

    rnResearch Institute of Petroleum Exploration & Development, Jidong Oilfield Company, PetroChina, Tangshan 063004, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    low-permeability reservoir; hierarchy analysis; genetic unit; architectural unit; flow unit; ordos basin;

    机译：低渗透油藏层次分析基因单位建筑单元;流量单位鄂尔多斯盆地;

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