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基于改进层次熵分析法的致密砂岩储层可压性评价——以准噶尔盆地Z109井侏罗系储层为例

宋明水 刘振 张学才 汪勇 李静 杨飞跃

宋明水, 刘振, 张学才, 等, 2019. 基于改进层次熵分析法的致密砂岩储层可压性评价——以准噶尔盆地Z109井侏罗系储层为例. 地质力学学报, 25 (4): 509-517. DOI: 10.12090/j.issn.1006-6616.2019.25.04.049
引用本文: 宋明水, 刘振, 张学才, 等, 2019. 基于改进层次熵分析法的致密砂岩储层可压性评价——以准噶尔盆地Z109井侏罗系储层为例. 地质力学学报, 25 (4): 509-517. DOI: 10.12090/j.issn.1006-6616.2019.25.04.049
SONG Mingshui, LIU Zhen, ZHANG Xuecai, et al., 2019. FRACTABILITY EVALUATION OF TIGHT SANDSTONE RESERVOIRS BASED ON IMPROVED ENTROPY ANALYTIC HIERARCHY PROCESS: TAKING THE JURASSIC RESERVOIRS OF WELL Z109 IN THE JUNGGAR BASIN AS AN EXAMPLE. Journal of Geomechanics, 25 (4): 509-517. DOI: 10.12090/j.issn.1006-6616.2019.25.04.049
Citation: SONG Mingshui, LIU Zhen, ZHANG Xuecai, et al., 2019. FRACTABILITY EVALUATION OF TIGHT SANDSTONE RESERVOIRS BASED ON IMPROVED ENTROPY ANALYTIC HIERARCHY PROCESS: TAKING THE JURASSIC RESERVOIRS OF WELL Z109 IN THE JUNGGAR BASIN AS AN EXAMPLE. Journal of Geomechanics, 25 (4): 509-517. DOI: 10.12090/j.issn.1006-6616.2019.25.04.049

基于改进层次熵分析法的致密砂岩储层可压性评价——以准噶尔盆地Z109井侏罗系储层为例

doi: 10.12090/j.issn.1006-6616.2019.25.04.049
基金项目: 

国家科技重大专项 2016ZX05002-002

国家自然科学基金 41272141

详细信息
    作者简介:

    宋明水(1964-), 男, 博士、教授级高级工程师, 主要从事油气勘探技术研究与管理工作。E-mail:songmingshui@sinopec.com

    通讯作者:

    李静(1967-), 女, 博士、教授、博士生导师, 地质力学及油气储层预测。E-mail:lijing0681@163.com

  • 中图分类号: TE357

FRACTABILITY EVALUATION OF TIGHT SANDSTONE RESERVOIRS BASED ON IMPROVED ENTROPY ANALYTIC HIERARCHY PROCESS: TAKING THE JURASSIC RESERVOIRS OF WELL Z109 IN THE JUNGGAR BASIN AS AN EXAMPLE

  • 摘要: 储层可压裂性评价是储层改造方案设计的重要依据,影响致密砂岩可压裂性的主要因素有天然裂缝、砂岩脆性、水平应力差异、断裂韧性等。研究以准噶尔盆地中部1区块Z109井侏罗系致密砂岩为例,综合考虑天然裂缝、砂岩脆性、水平应力差异、断裂韧性四种影响因素,采用改进的层次分析和熵值法相结合的方法进行了致密砂岩储层可压裂性评价。研究结果表明:可压裂性指数越大,致密砂岩储层越易于压裂,压裂时越能获得较复杂的裂缝网络;可压裂性指数大于0.44,砂岩脆性高,断裂韧性小,裂缝发育程度高,水平差异系数小的储层段为Ⅰ级优质压裂层;可压裂性指数大于0.44,砂岩脆性高,断裂韧性小,裂缝发育程度低,水平差异系数大的储层段为Ⅱ级可压裂层;研究区Z109井4036~4039 m、4062~4067 m、4214~4218 m和4260~4272 m为Ⅰ级优质压裂层,4093~4108 m和4284~4313 m为Ⅱ级可压裂层。研究成果可为致密砂岩压裂改造提供科学依据。

     

  • 图  1  可压裂性影响因素层次结构模型

    Figure  1.  Hierarchy structure model of the factors influencing of fracability

    图  2  可压裂性评价解释成果图

    Figure  2.  The result diagram of fracture evaluation interpretation

    表  1  判断矩阵标度

    Table  1.   Judgement matrix scale

    标度 含义
    1 表示两影响因素相比,重要性相同
    3 表示两影响因素相比,一个比另一个稍微重要
    5 表示两影响因素相比,一个比另一个重要
    7 表示两影响因素相比,一个比另一个明显重要
    9 表示两影响因素相比,一个比另一个极其重要
    2,4,6,8 上述两相邻判断中间值
    下载: 导出CSV

    表  2  比较矩阵判断值

    Table  2.   Comparison matrix judgment value

    标度 含义
    2 指标i比指标j重要
    1 指标i和指标j一样重要
    0 指标i没指标j重要
    下载: 导出CSV

    表  3  判断矩阵元素计算式

    Table  3.   Formula of judgement matrix element

    rirj大小 aij
    ri=ri 1
    ri>ri ri-ri
    ri < ri [ri-ri]-1
    下载: 导出CSV

    表  4  可压裂性评价因素比较矩阵

    Table  4.   Fracture evaluation factor comparison matrix

    裂缝发育
    指数(I)
    脆性
    指数
    (BI)
    水平应力
    差异系数
    (Kh)
    断裂
    韧性
    (KIC)
    ri
    天然裂缝(I) 1 0 2 0 3
    脆性指数(BI) 2 1 2 2 7
    水平应力差异系数(Kh) 0 0 1 0 1
    断裂韧性(KIC) 2 0 2 1 5
    下载: 导出CSV

    表  5  熵值法计算结果

    Table  5.   `The calculation results based on entropy method

    指标 裂缝发育
    指数(I)
    脆性指数
    (BI)
    水平应力差异
    系数(Kh)
    断裂韧性
    (KIC)
    Hi 0.8197 0.8423 0.8423 0.8197
    Wi 0.2667 0.2333 0.2333 0.2667
    ξi 0.14 0.51 0.07 0.28
    λi 0.15 0.48 0.07 0.30
    下载: 导出CSV
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  • 收稿日期:  2018-09-11
  • 修回日期:  2019-01-09
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