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缝洞型碳酸盐岩靶向酸压目标体分类与建模

宋志峰 张建光

宋志峰, 张建光. 缝洞型碳酸盐岩靶向酸压目标体分类与建模[J]. 地质科技通报, 2021, 40(3): 78-84. doi: 10.19509/j.cnki.dzkq.2021.0303
引用本文: 宋志峰, 张建光. 缝洞型碳酸盐岩靶向酸压目标体分类与建模[J]. 地质科技通报, 2021, 40(3): 78-84. doi: 10.19509/j.cnki.dzkq.2021.0303
Song Zhifeng, Zhang Jianguang. Classification and modeling of targeted fracture-cave bodies in acid fracturing[J]. Bulletin of Geological Science and Technology, 2021, 40(3): 78-84. doi: 10.19509/j.cnki.dzkq.2021.0303
Citation: Song Zhifeng, Zhang Jianguang. Classification and modeling of targeted fracture-cave bodies in acid fracturing[J]. Bulletin of Geological Science and Technology, 2021, 40(3): 78-84. doi: 10.19509/j.cnki.dzkq.2021.0303

缝洞型碳酸盐岩靶向酸压目标体分类与建模

doi: 10.19509/j.cnki.dzkq.2021.0303
基金项目: 

国家自然科学基金项目 41502131

中央高校基本科研业务费专项 18CX02101A

国家重大专项 2016ZX05014-004-007

国家重大专项 2016ZX05053-14

详细信息
    作者简介:

    宋志峰(1983-), 男, 副研究员, 主要从事油气田开发研究工作。E-mail: zhifengsong@126.com

    通讯作者:

    张建光(1983-), 男, 讲师, 主要从事油气田开发研究工作。E-mail: eduzjg@163.com

  • 中图分类号: P588.24+5

Classification and modeling of targeted fracture-cave bodies in acid fracturing

  • 摘要: 塔河油田碳酸盐岩井周缝洞型储集体靶向酸压改造工艺针对性强,对于靶向目标精准定位与表征要求很高。围绕井周酸压增储提效,精准定量表征井筒附近储集体主应力方位、距离、规模、空间分布成为亟待解决的关键问题。从井孔与井周储层识别角度切入,采用一维资料-三维资料,多方法结合定量识别与刻画不同储层类型,在分类表征基础上,实现了模型的分类整合,构建了单元级次的多类型缝洞融合储层模型。然后,在单元级次模型基础上,创建了井周不同范围的可视化三维定量模型构建技术方法,建立了实际单井定量模型,并基于酸压靶向目标体三级八因素分类划分指标体系,确定了7种类型靶向目标体及适应的酸压技术方法。靶向酸压工艺矿场应用显示:靶向酸压井措施效果显著,同样区块范围井,比常规酸压方法平均增产倍比大,显著提高了酸压工艺的针对性和靶向性,有较好的推广应用前景。

     

  • 图 1  不同储层类型的识别参数模型

    Figure 1.  Identification parameters of different reservoir types

    图 2  不同储层类型的双压降分布

    Figure 2.  Dual pressure drop distribution of different reservoir types

    图 3  大尺度裂缝储层的刻画

    Figure 3.  Identification of large scale fracture reservoirs

    图 4  洞穴类型储层地震反演

    Figure 4.  Seismic inversion of the cave reservoirs

    图 5  溶蚀孔洞类型储层地震反演

    Figure 5.  Seismic inversion of the fracture-vug reservoirs

    图 6  S80单元多元储层融合模型

    Figure 6.  Multiple reservoir fusion model of S80 unit

    图 7  井周靶向储集体目标刻画流程

    Figure 7.  Characterization process of target reservoir near wellbore

    图 8  TK775H井周靶向储集体目标模型

    Figure 8.  Characterization process of target reservoir near wellbore

    图 9  井筒周围不同酸压区域的储集体特征

    Figure 9.  Reservoir characteristics of different aciding-fracture areas around wellbore

    表  1  塔河S80单元人工解释断层属性特征

    Table  1.   Fault attribute characteristics of S80 in Tahe Oilfield

    方位 断层数/条 倾角/(°) 长度/m
    平均值 范围 平均值 范围
    北西向 15 80 72~86 590 180~1 400
    北东向 19 82 74~85 760 140~2 600
    东西向 9 79 70~83 120 110~220
    总计 43 81 70~86 630 110~2 600
    下载: 导出CSV

    表  2  塔河靶向储集体目标划分指标体系

    Table  2.   Reservoir targets classification index system

    距离与方位 空间展布 施工参数
    与井筒距离/m 与主应力夹角/
    (°)
    平面分布与厚度/m 储量/
    104t
    形态结构(分层分段) 靶体数量 井型与海拔深度/m 避水高度/
    m
    近井周
    <30;
    远井周
    [30, 80);
    超远井
    [80, 300]
    低夹角
    (<45°);
    高夹角
    (>75°)
    单靶点
    类型;
    多靶点
    类型
    大规模
    >2.0;
    中等规模[2.0,
    1.0);
    小规模
    <1.0
    直井(两层/多层); 水平井(两段/多段) 单目标;
    多目标
    直井;
    水平井
    无避水
    ≤30;
    高避水
    >30
    下载: 导出CSV

    表  3  塔河S80区主要靶向储集体目标划分类型

    Table  3.   Types of reservoir targets of S80 unit in Tahe Oilfield

    大类
    类别
    小类类别 属性特征 适合的
    酸压技术
    主应
    力方
    第1类,近井周-近主应力-无避水型-单目标洞穴型储集体 D<30 m,
    ANGLE<5°,
    H>30 m
    常规酸压工艺技术
    低非
    主应
    力方
    第2类,近/远井周-低非主应力-无避水型-单目标洞穴/暗河型储集体 D<80 m,
    ANGLE<45°,
    H>30 m
    缝内暂堵转向酸压工艺技术
    第3类,近/远井周-低非主应力+无避水型—多目标洞穴/暗河型储集体 D<80 m,
    ANGLE<45°,
    H>30 m, MUIT>1
    段间缝内暂堵转向酸压工艺技术
    高非
    主应力
    方位
    第4类,近井周-高非主应力-避水类型-单目标洞穴型储集体 D<30 m,
    ANGLE>75°,
    H<30 m
    脉冲波压裂技术(需控缝高)
    水平
    井目
    标体
    类型
    第5类,近井周-低角度斜交主应力-单目标地下洞穴型储集体 D<30 m,
    ANGLE<45°,
    H>30 m
    定向处理后缝内暂堵转向酸压
    第6类,近/远井周-低角度斜交主应力分段多目标体类型—洞穴型储集体 D<80 m,
    ANGLE<45°,
    H>30 m, MUIT>1
    定向处理后分段酸压工艺技术
    第7类,近/远井周-高角度斜交主应力方位分段多目标体片状风化壳+洞穴型储集体 D<80 m,
    ANGLE>75°,
    H>30 m, MUIT>1
    无工具分段酸压工艺技术
    注:D为距离;ANGLE为力面度;H为避水高度;MUIT为目标体
    下载: 导出CSV
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