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    大气水在碎屑岩次生孔隙形成中的作用——以鄂尔多斯盆地三叠系延长组为例

    黄思静 武文慧 刘洁 沈立成 黄成刚

    黄思静, 武文慧, 刘洁, 沈立成, 黄成刚, 2003. 大气水在碎屑岩次生孔隙形成中的作用——以鄂尔多斯盆地三叠系延长组为例. 地球科学, 28(4): 419-424.
    引用本文: 黄思静, 武文慧, 刘洁, 沈立成, 黄成刚, 2003. 大气水在碎屑岩次生孔隙形成中的作用——以鄂尔多斯盆地三叠系延长组为例. 地球科学, 28(4): 419-424.
    HUANG Si-jing, WU Wen-hui, LIU Jie, SHEN Li-cheng, HUANG Cheng-gang, 2003. Generation of Secondary Porosity by Meteoric Water during Time of Subaerial Exposure: An Example from Yanchang Formation Sandstone of Triassic of Ordos Basin. Earth Science, 28(4): 419-424.
    Citation: HUANG Si-jing, WU Wen-hui, LIU Jie, SHEN Li-cheng, HUANG Cheng-gang, 2003. Generation of Secondary Porosity by Meteoric Water during Time of Subaerial Exposure: An Example from Yanchang Formation Sandstone of Triassic of Ordos Basin. Earth Science, 28(4): 419-424.

    大气水在碎屑岩次生孔隙形成中的作用——以鄂尔多斯盆地三叠系延长组为例

    基金项目: 西南石油学院油气藏地质及开发工程国家重点实验室项目
    详细信息
      作者简介:

      黄思静(1949-), 男, 教授, 1982年毕业于武汉地质学院沉积岩石学专业, 获理学硕士学位, 现主要从事沉积学和石油地质学的教学与科研工作

    • 中图分类号: P618.130

    Generation of Secondary Porosity by Meteoric Water during Time of Subaerial Exposure: An Example from Yanchang Formation Sandstone of Triassic of Ordos Basin

    • 摘要: 鄂尔多斯盆地三叠系延长组砂岩储层分布于印支期不整合面之下, 次生孔隙是最主要的石油储集空间.在大量薄片研究及资料统计的基础上, 从岩石物性、长石溶蚀形成的次生孔隙、高岭石和长石含量纵向变化等证据出发, 认为延长组砂岩储层次生孔隙的形成机制与印支期暴露时间间隔中大气水的溶解作用有关, 而不是埋藏成岩过程中有机酸溶解作用的结果, 同时人们也应对鄂尔多斯盆地延长组碎屑岩储层质量预测模式作必要更改.

       

    • 图  1  鄂尔多斯盆地三叠系延长组砂岩碎屑成分三角投点(2 989个砂岩薄片鉴定结果)[13]

      Fig.  1.  Plot of w (Q), w (F), w (R) for 2 989 sandstone samples from analysis results of thin sections in Yanchang Formation of Triassic, Ordos basin

      图  2  鄂尔多斯盆地三叠系延长组储层砂岩孔隙的构成方式

      (2 353个砂岩铸体薄片的分析统计结果)

      Fig.  2.  Histogram for porosity constitution of sandstone reservoir by 2 353 impregnated thin sections in Yanchang Formation of Triassic, Ordos basin

      图  3  鄂尔多斯盆地三叠系延长组主要储层段(长2-长8) 孔隙度(a) 和渗透率(b) 的纵向变化趋势(平均值指各油层组的平均值, 样品总数为59 023个)

      Fig.  3.  Vertical evolution trend of porosity (a) and permeability (b) of Yanchang Formation (Chang 2—Chang 8) of Triassic, Ordos basin (59 023 samples)

      图  4  鄂尔多斯盆地三叠系延长组主要储层段(长2-长8) 长石溶蚀孔隙(a)、次生孔隙(b) 和自生高岭石含量(c) 的纵向变化趋势(2 353个铸体薄片孔隙分类及薄片分析统计结果)

      Fig.  4.  Vertical evolution trend of porosity by feldspar dissolution (a), secondary porosity (b) and content of authigenic kaolinite (c) of Yanchang Formation (Chang 2—Chang 8) of Triassic, Ordos basin

      图  5  鄂尔多斯盆地P井延长组砂岩长石含量、自生高岭石含量及面孔率、长石溶蚀次生孔隙的纵向变化特征

      Fig.  5.  Vertical evolution characteristics of content of authigenic kaolinite and feldspar, and thin section porosity and secondary porosity by feldspar dissolution of Yanchang Formation sandstone in Well P, Ordos basin

      图  6  长2段次生孔隙被溶长石的轮廓和被溶解长石残余

      铸体薄片, 茜素红、铁氰化钾混合溶液染色, 单偏光, 对角线长1.75 mm

      Fig.  6.  Secondary porosity by feldspar dissolution of Chang 2 member

      表  1  鄂尔多斯盆地三叠系延长组地层的划分

      Table  1.   Stratigraphic classification of Triassic, Ordos basin

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      [3] Hayes M J, Boles J R. Volumetric relations betw een dissolved plagioclase and kaolinite in sandstones : implications for aluminum mass transfer in the San Joaquin basin, California[J]. Special Publication Society of Eco nomic Paleontologists and M ineralogists, 1992, 47 : 111-123.
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      [5] 黄思静, 杨俊杰, 张文正, 等. 不同温度条件下乙酸对长石溶蚀过程的实验研究[J]. 沉积学报, 1995, 13(1) : 7-17. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB501.001.htm

      HUANG S J, YAN G J J, Z HAN G W Z, et al. Experimental study o f feldspar dissolution by acetic acid at different burial temperatures[J]. A cta Sedimentologica Sinica, 1995, 13(1) : 7-17. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB501.001.htm
      [6] Bjφrlykke K, Nedkvitne T, Ramm M, et al. Diagene tic processes in the Brent G roup (Middle Jurassic) reservoirs of the No rth Sea: an overview[J]. Geological Society Special Publications, 1992, 61: 263-287. doi: 10.1144/GSL.SP.1992.061.01.15
      [7] Ehrenberg S N. K aolinized, po tassium-leached zo nes at the contacts of the Garn Formation, Haltenbanken, midNorwegian co ntinental shelf[J]. M arine and Petroleum Geology, 1991, 8: 250 -269. doi: 10.1016/0264-8172(91)90080-K
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      Editorial Committee of Petroleum Geology of Changqing Oilfield. Petroleum geology of China: Changqing oilfield [M]. Beijing: Petroleum Industry Press, 1992.1-22.
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      LIU B J. Sedimentary petrology[M]. Beijing : Geological Publishing House, 1980.125-127.
      [14] 黄思静, 侯中建. 地下孔隙度和渗透率在时间和空间上的变化及影响因素[J]. 沉积学报, 2001, 19(2) : 224-232. doi: 10.3969/j.issn.1000-0550.2001.02.011

      HUANG S J, HOU Z J. Spatio-temporal variation of subsurface porosity and permeability and its influential fa ctors[J]. Acta Sedimentologica Sinica, 2001, 19(2) : 224-232. doi: 10.3969/j.issn.1000-0550.2001.02.011
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    • 收稿日期:  2003-04-18
    • 刊出日期:  2003-07-25

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