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乌石东区成岩演化数值模拟与孔隙度预测

杨丽 覃利娟 彭志春 甘永年 晁彩霞

杨丽, 覃利娟, 彭志春, 甘永年, 晁彩霞. 乌石东区成岩演化数值模拟与孔隙度预测[J]. 地质科技通报, 2022, 41(3): 150-157. doi: 10.19509/j.cnki.dzkq.2022.0069
引用本文: 杨丽, 覃利娟, 彭志春, 甘永年, 晁彩霞. 乌石东区成岩演化数值模拟与孔隙度预测[J]. 地质科技通报, 2022, 41(3): 150-157. doi: 10.19509/j.cnki.dzkq.2022.0069
Yang Li, Qin Lijuan, Peng Zhichun, Gan Yongnian, Chao Caixia. Numerical simulation of diagenetic evolution and porosity prediction in eastern area of Wushi Sag[J]. Bulletin of Geological Science and Technology, 2022, 41(3): 150-157. doi: 10.19509/j.cnki.dzkq.2022.0069
Citation: Yang Li, Qin Lijuan, Peng Zhichun, Gan Yongnian, Chao Caixia. Numerical simulation of diagenetic evolution and porosity prediction in eastern area of Wushi Sag[J]. Bulletin of Geological Science and Technology, 2022, 41(3): 150-157. doi: 10.19509/j.cnki.dzkq.2022.0069

乌石东区成岩演化数值模拟与孔隙度预测

doi: 10.19509/j.cnki.dzkq.2022.0069
基金项目: 

中国石油(中国)有限公司重大科技专项"南海西部海上油田上产2000万方关键技术研究" CNOOC-KJ135ZDXM38ZJ

详细信息
    作者简介:

    杨丽(1984—),女,工程师,主要从事地质研究工作。E-mail:agoodheaven@126.com

  • 中图分类号: TE19

Numerical simulation of diagenetic evolution and porosity prediction in eastern area of Wushi Sag

  • 摘要:

    乌石东区已发现的商业性油田主要形成于复杂陆相沉积环境, 受构造、沉积和成岩作用综合影响, 储层非均质性强, 油藏渗流特征复杂, 直接影响着油田的开发方案制定。因此, 有必要开展储层物性主控因素分析, 从理论上和技术上实现甜点区预测。研究采用成岩数值模拟的方法, 基于成岩环境参数, 应用化学动力学模型, 通过对镜质组反射率、古地温、伊/蒙混层中蒙皂石层含量和石英自生加大的模拟, 加权平均得到成岩指数。根据成岩指数的变化对储层成岩阶段及孔隙度横向展布规律进行预测。模拟结果表明, 乌石东区成岩阶段主要为中成岩A1-A2期, 凹陷中心成岩作用较强, 向北逐渐减弱。综合沉积、成岩等认识, 建立孔隙度预测模型, 对孔隙度进行平面预测, 预测结果表明: 顺物源方向, 随埋深增大, 储层物性变差, 同成岩作用变化趋势一致。

     

  • 图 1  地层综合柱状图

    Figure 1.  Columnar section of formation

    图 2  岩石类型三角图

    Figure 2.  Triangular plot of petrological characteristics

    图 3  铸体薄片微观照片

    a.铁方解石嵌晶式胶结; b.铁白云石胶结; c.菱铁矿呈集合体状产于粒间

    Figure 3.  Photo of casting sheet

    图 4  乌石东区孔渗度分布直方图

    Figure 4.  Histogram of porosity and permeability distribution in Wushi East District

    图 5  标准井实测数据与模拟数据对比图

    Figure 5.  Comparison diagram of measured data and simulated data of standard Wells

    图 6  乌石东区成岩阶段平面预测图

    Figure 6.  Plane prediction of diagenetic stage in The Eastern District of Wushi

    图 7  成岩指数ID、泥质质量分数、分选系数、粒度中值等与孔隙度相关关系图

    Figure 7.  Correlation diagram between diagenetic index ID, shale content, sorting coefficient, median particle size and porosity

    图 8  乌石东区孔隙度平面预测图

    Figure 8.  Plane prediction diagram of porosity in the eastern district of Wushi

    表  1  平面模拟实测数据与模拟数据对比表

    Table  1.   Comparison between measured data and simulated data in plane simulation

    层位 井名 模拟Ro/% 实测Ro/% 误差/%
    流一段 A1 0.57 0.51 11.76
    A4 0.53 0.58 -8.62
    A5 0.54 0.54 0
    C1 0.57 0.55 3.64
    C2d 0.52 0.55 -5.45
    AW4d 0.58 0.54 7.41
    流二段 A1 0.73 0.70 4.29
    A2 0.81 0.80 1.25
    A4 0.68 0.71 -4.23
    A5 0.62 0.59 5.98
    B1 0.58 0.59 -1.69
    B9 0.64 0.59 9.40
    D1 0.68 0.74 -8.11
    AW4d 0.73 0.73 0
    流三段 A2 0.99 1.03 -3.88
    A4 0.83 0.88 -5.68
    A5 0.71 0.69 3.35
    AW4d 0.79 0.90 -11.73
    B1 0.63 0.68 -7.35
    B9 0.69 0.66 4.55
    注:实测数据据中海油实验中心湛江实验中心
    下载: 导出CSV

    表  2  乌石东区孔隙度预测与实测数据对比表

    Table  2.   Comparison of porosity prediction and measured data in eastern Wushi area

    井名 层位 实测孔隙度/% 预测孔隙度/% 误差/%
    W1 流一段 18.50 17.12 -7.46
    A1 流一段 18.72 19.55 4.42
    A2 流一段 19.13 18.46 -3.50
    A7d 流一段 17.33 18.03 4.05
    E1 流一段 16.36 17.69 8.16
    D1 流一段 19.25 17.97 -6.63
    A5 流二段 17.29 16.63 -3.80
    AW1 流二段 15.11 14.32 -5.23
    AW7 流二段 14.12 14.44 2.25
    C3 流二段 20.89 19.96 -4.45
    B14 流二段 16.49 17.01 3.13
    F3 流二段 17.84 16.22 -9.09
    A4 流三段 7.73 7.95 2.79
    C2 流三段 19.32 18.29 -5.34
    C4 流三段 18.03 20.01 10.95
    B14 流三段 17.96 17.81 -0.81
    B7 流三段 18.17 18.72 3.00
    注:实测数据据中海油实验中心湛江实验中心
    下载: 导出CSV
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  • 收稿日期:  2021-07-26

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