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低温相变过程对石英矿物中盐水包裹体再平衡作用的影响

刘可禹 张书林 杨鹏

刘可禹, 张书林, 杨鹏. 低温相变过程对石英矿物中盐水包裹体再平衡作用的影响[J]. 石油实验地质, 2023, 45(5): 882-890. doi: 10.11781/sysydz202305882
引用本文: 刘可禹, 张书林, 杨鹏. 低温相变过程对石英矿物中盐水包裹体再平衡作用的影响[J]. 石油实验地质, 2023, 45(5): 882-890. doi: 10.11781/sysydz202305882
LIU Keyu, ZHANG Shulin, YANG Peng. Effect of low-temperature phase change on the re-equilibration of brine inclusions hosted in quartz minerals[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(5): 882-890. doi: 10.11781/sysydz202305882
Citation: LIU Keyu, ZHANG Shulin, YANG Peng. Effect of low-temperature phase change on the re-equilibration of brine inclusions hosted in quartz minerals[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(5): 882-890. doi: 10.11781/sysydz202305882

低温相变过程对石英矿物中盐水包裹体再平衡作用的影响

doi: 10.11781/sysydz202305882
基金项目: 

国家自然科学基金委油气成藏机理创新研究群体 41821002

特提斯地球动力系统重大研究计划 92055204

详细信息
    作者简介:

    刘可禹(1963-), 男, 教授, 本刊编委, 从事盆地模拟与油气成藏研究。E-mail: liukeyu@upc.edu.cn

  • 中图分类号: TE135

Effect of low-temperature phase change on the re-equilibration of brine inclusions hosted in quartz minerals

  • 摘要: 流体包裹体显微测温分析应当遵循先开展均一温度测定、后进行冰点测定的分析流程,但在实际操作过程中该测试流程并未严格执行,不少研究者在测完冰点温度(Tm)后继续重复测试该样品的均一温度(Th),从而导致测试结果可能存在诸多不确定性。为了揭示低温相变过程对盐水包裹体再平衡作用的影响,引起广大研究人员对流体包裹体显微测温流程的重视,在盐水包裹体岩相学观察以及显微激光拉曼分析的基础上,开展流体包裹体显微测温分析,结合流体包裹体PVTx数值模拟以及前人研究结果,定量对比不同测温顺序得到的显微测温数据的差异。结果表明:冰点测试之前,盐水包裹体均一温度可以被多次重复测试;在低温相变测温过程中盐水包裹体可能会发生拉伸甚至泄露,其均一温度值会有一定程度的上升,但其冰点温度值基本不变,因此低温相变测温可能会造成其记录的原始信息发生重置;相较于方解石矿物,石英内部的盐水包裹体具有更强的抵抗再平衡作用影响的能力;较高的气体充填度以及高盐度可以在一定程度上减缓再平衡作用对盐水包裹体的影响;在低温相变测温过程中,由于水结冰产生的体积膨胀作用,盐水包裹体发生拉伸甚至泄露等再平衡现象普遍存在,导致盐水包裹体的均一温度值普遍升高。

     

  • 图  1  流体包裹体显微测温流程

    Figure  1.  Measurement sequence for fluid inclusion microthermometric analysis

    图  2  石英矿物中盐水包裹体显微照片及其显微激光拉曼光谱

    Figure  2.  Microphotographs and Raman spectra of brine inclusions within quartz minerals

    图  3  流体包裹体显微测温实验Th0Th-AM交会图

    Figure  3.  Cross plots of Th0 and Th-AM values of fluid inclusion microthermometric measurement

    图  4  低温相变测温前后盐水包裹体均一温度变化

    Figure  4.  Barcharts of Th values before and after low-temperature phase-change measurement, respectively

    图  5  低温相变测温前后盐水包裹体冰点温度变化

    Figure  5.  Barcharts of Tm values before and after low-temperature phase-change measurement, respectively

    图  6  流体包裹体显微测温实验Th0与ΔTh交会图

    Figure  6.  Cross plots of Th0 and ΔTh values of fluid inclusion microthermometric measurement

    图  7  流体包裹体显微测温实验Tm0与ΔTh交会图

    Figure  7.  Cross plots of Tm0 and ΔTh values of fluid inclusion microthermometric measurement

    图  8  两种不同组分盐水包裹体的P-T相图

    Figure  8.  P-T projection of two brine inclusions having different salinity values

    表  1  流体包裹体显微测温实验数据

    Table  1.   Summary of fluid inclusion microthermometric measurement results

    井名 深度/m FIA Th0/℃ Th2/℃ Th3/℃ Th-AM/℃ Tm0/℃ Th*/℃ ΔTh/℃ Tm*/℃
    Y33-1 3 771.0 152.8 152.3 152.6 152.6 -3.5 158.0 5.2 -3.5
    153.6 153.3 153.8 153.6 -3.5 159.0 5.4 -3.5
    153.8 154.2 154.0 154.0 -3.5 159.8 6.0 -3.5
    154.2 154.2 154.5 154.3 -3.5 160.2 6.0 -3.5
    154.7 154.5 154.8 154.7 -3.5 161.7 7.0 -3.5
    155.5 155.2 155.4 155.4 -3.5 160.5 5.0 -3.5
    156.2 156.1 156.3 156.2 -3.5 161.6 5.4 -3.5
    157.3 157.3 157.3 157.3 -3.6 162.1 4.8 -3.6
    157.8 162.6 163.5 161.3 -3.6 162.2 4.4 -3.6
    157.8 158.0 157.8 157.9 -3.6 162.9 5.1 -3.6
    158.4 158.4 158.6 158.5 -3.6 163.6 5.2 -3.6
    158.5 158.8 158.5 158.6 -3.6 163.8 5.3 -3.6
    158.8 159.0 159.0 158.9 -3.6 164.4 5.6 -3.6
    159.1 158.9 159.4 159.1 -3.6 164.7 5.6 -3.6
    159.4 159.6 159.5 159.5 -3.6 165.5 6.1 -3.6
    159.9 159.7 159.9 159.8 -3.7 166.2 6.3 -3.7
    161.7 161.8 162.0 161.8 -3.7 167.8 6.1 -3.7
    162.9 162.8 163.2 163.0 -3.7 166.3 3.4 -3.7
    164.5 164.5 164.7 164.6 -3.8 168.4 3.9 -3.8
    165.6 165.5 165.8 165.6 -3.8 170.5 4.9 -3.8
    4 347.0 176.8 176.6 176.8 176.7 -5.8 182.3 5.5 -5.8
    182.2 182.0 182.0 182.1 -5.9 185.5 3.3 -5.9
    183.5 183.6 183.5 183.5 -6.0 186.7 3.2 -5.9
    185.5 185.3 185.6 185.5 -6.0 188.7 3.2 -6.0
    186.8 187.0 187.1 187.0 -6.0 189.0 2.2 -6.0
    187.8 187.8 187.8 187.8 -6.0 191.7 3.9 -6.0
    188.1 188.3 188.0 188.1 -6.0 192.2 4.1 -6.0
    189.6 189.5 189.8 189.6 -6.0 193.8 4.2 -6.0
    Y36-2 3 771.0 + 141.1 141.1 141.2 141.1 -5.3 141.8 0.7 -5.3
    143.8 143.6 143.9 143.8 -5.3 144.5 0.7 -5.3
    147.3 147.2 147.5 147.3 -5.3 148.0 0.7 -5.4
    150.8 150.9 150.8 150.8 -5.4 151.5 0.7 -5.4
    152.3 152.3 152.4 152.3 -5.4 152.8 0.5 -5.4
    # 271.8 271.5 272.0 271.8 -1.3 272.1 0.3 -1.3
    273.6 273.9 273.9 273.8 -1.3 274.2 0.6 -1.3
    276.7 282.2 280.9 279.9 -1.3 277.3 0.6 -1.3
    288.5 288.5 288.9 288.6 -1.3 289.2 0.7 -1.3
    293.7 293.2 294.3 293.7 -1.3 294.0 0.3 -1.3
    4 051.0 + 154.6 154.5 154.8 154.6 -8.3 155.1 0.5 -8.3
    156.6 156.5 156.8 156.6 -8.3 156.9 0.3 -8.3
    157.8 157.8 157.8 157.8 -8.3 158.2 0.4 -8.3
    158.0 158.0 158.2 158.1 -8.3 158.7 0.7 -8.3
    159.5 159.3 159.4 159.4 -8.3 159.9 0.4 -8.3
    160.6 160.7 160.9 160.7 -8.3 161.0 0.4 -8.3
    H34-6 3 833.0 127.2 127.0 127.3 127.2 -1.3 137.8 10.6 -0.7
    128.7 128.8 128.9 128.8 -1.3 138.2 9.5 -0.7
    129.8 129.6 129.9 129.8 -1.3 139.9 10.1 -0.8
    133.5 139.0 139.9 137.5 -1.4 140.6 7.1 -0.8
    3 903.0 135.2 135.0 135.3 135.2 -2.9 141.5 6.3 -3.2
    135.5 135.4 135.7 135.5 -3.0 141.8 6.3 -3.3
    136.3 136.1 136.2 136.2 -3.0 142.3 6.0 -3.3
    136.6 136.5 136.8 136.6 -3.0 142.9 6.3 -3.3
    137.1 137.0 137.3 137.1 -3.0 143.6 6.5 -3.3
    Y29-1 3 196.0 178.8 178.9 180.0 179.2 -8.8 181.8 3.0 -8.8
    179.6 179.6 179.6 179.6 -8.8 182.3 2.7 -8.8
    180.5 180.3 180.6 180.5 -8.7 182.8 2.3 -8.7
    183.2 182.9 183.1 183.1 -8.6 185.2 2.0 -8.6
    184.3 184.0 184.6 184.3 -8.6 186.6 2.3 -8.6
    Y15-1 3 104.5 * 227.8 227.4 227.8 227.7 -2.7 238.3 10.5 -2.7
    229.3 229.7 229.4 229.5 -2.6 240.4 11.1 -2.7
    230.5 238.3 238.8 235.9 -2.6 241.1 10.6 -2.6
    Y27-2 3 551.5 * 214.3 213.8 214.5 214.2 -1.2 220.8 6.5 -1.2
    214.6 215.0 215.2 214.9 -1.3 221.1 6.5 -1.3
    215.1 217.8 218.3 217.1 -1.3 221.7 6.6 -1.3
    3 807.5 * 221.9 221.6 221.9 221.8 -1.3 229.8 7.9 -1.2
    222.2 222.5 222.7 222.5 -1.4 230.5 8.3 -1.3
    222.5 222.1 222.8 222.5 -1.4 230.5 8.0 -1.3
    223.2 222.9 223.3 223.1 -1.4 231.2 8.0 -1.3
    225.8 225.5 226.0 225.8 -1.4 232.4 6.6 -1.3
    注:+代表图 6虚线圈中数据,*代表图 6实线圈中数据,#代表图 7实线圈中数据。
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  • 收稿日期:  2023-07-06
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