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川东北元坝中部须家河组构造裂缝形成期次分析

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李玉玺, 范存辉, 李虎, 韩雨恬, 秦启荣. 川东北元坝中部须家河组构造裂缝形成期次分析[J]. 西北地质, 2018, 51(1): 265-271.
引用本文: 李玉玺, 范存辉, 李虎, 韩雨恬, 秦启荣. 川东北元坝中部须家河组构造裂缝形成期次分析[J]. 西北地质, 2018, 51(1): 265-271.
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LI Yuxi, FAN Cunhui, LI Hu, HAN Yutian, QIN Qirong. Formation Stagesabout Structural Fractures of Xujiahe Formation in Fault-Fold Belt of Central Yuanba Area, Northeast Sichuan[J]. Northwestern Geology, 2018, 51(1): 265-271.
Citation: LI Yuxi, FAN Cunhui, LI Hu, HAN Yutian, QIN Qirong. Formation Stagesabout Structural Fractures of Xujiahe Formation in Fault-Fold Belt of Central Yuanba Area, Northeast Sichuan[J]. Northwestern Geology, 2018, 51(1): 265-271.
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川东北元坝中部须家河组构造裂缝形成期次分析

  • 1.

    西南石油大学地球科学与技术学院, 四川 成都 610500

  • 2.

    西南石油大学地球科学与技术学院, 四川 成都 610500;中国石油塔里木油田分公司, 新疆 库尔勒 841000

  • 基金项目: 国家重大科技专项“低渗透储层天然裂缝测井识别和分布预测研究”（2011ZX05013-006-008）、四川省应用基础研究项目“冲断带前缘地腹高陡逆断裂形成机理及裂缝发育量化预测”（2017JY0176）

Formation Stagesabout Structural Fractures of Xujiahe Formation in Fault-Fold Belt of Central Yuanba Area, Northeast Sichuan

  • 1.

    School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China

  • 2.

    School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China;Tarim Oilfield Company, Petro China, Korla 841000, Xinjiang, China

    摘要
  • 四川盆地元坝中部须家河组储层裂缝主要以构造裂缝为主，构造作用所形成的裂缝是致密砂岩储层主要的渗滤通道和储集空间。研究区构造缝主要以低角度剪切缝和高角度剪切缝为主，裂缝长度变化范围较大，宽度较窄，具有间距大、密度小的特征，裂缝充填主要以全充填和半充填为主，充填物以方解石为主，充填程度不高，总体上有效性较好。在不考虑第一期成岩缝的前提下，确定了研究构造裂缝形成期次共3期：第一期为形成于燕山运动晚期的北东（30°±5°）、北西（315°±5°）向“X”型共轭剪切缝；第二期裂缝为形成于喜马拉雅运动早—中期的南北（0°±5°）、北东东（75°±10°）向“X”型共轭剪切缝；第三期裂缝为形成喜马拉雅运动晚期北西西（290°±10°）向剪切缝。
    The reservoir of Xujiahe Formation in Fault-Fold Belt of central Yuanba area are mainly structural fractures, which serve as the main percolation channels and reservoir spaces in tight sandstone reservoirs.The structural fractures in this studying area are mainly dominated by low-and high-angle shearing cracks.These cracks have wide changing range in length and narrow width, with large spacing and low density.And these cracks are mainly filled by calcite, muddy and carbonaceous fillings through the full-and semi-filling methods, without high filling degree but with better overall effectiveness.Without considering the diagenetic fracture, three stages of structural fractures are developed in this studying area.The first stage fractures are formed in Late Yanshanian tectonic movement, developing with orientation strikes in NE(30°±5°), NW (315°±5°)trending.The second stage fractures are formed in early-middle Himalaya tectonic movement, with orientation strikes in NEE(75°±10°)and SN(0°±5°)trending.The third stage fractures are formed in late-Himalaya tectonic movement, with orientation strikes in NWW(290°±10°)trending.
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出版历程
收稿日期:  2017-03-02
修回日期:  2017-10-20
刊出日期:  2018-03-15

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