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    琼东南盆地宝岛-长昌凹陷陵水组储层差异演化特征

    钟佳 杨希冰 朱沛苑 徐守立 邓孝亮 庹雷 李兴 宋鹏

    钟佳, 杨希冰, 朱沛苑, 徐守立, 邓孝亮, 庹雷, 李兴, 宋鹏, 2019. 琼东南盆地宝岛-长昌凹陷陵水组储层差异演化特征. 地球科学, 44(8): 2665-2676. doi: 10.3799/dqkx.2019.097
    引用本文: 钟佳, 杨希冰, 朱沛苑, 徐守立, 邓孝亮, 庹雷, 李兴, 宋鹏, 2019. 琼东南盆地宝岛-长昌凹陷陵水组储层差异演化特征. 地球科学, 44(8): 2665-2676. doi: 10.3799/dqkx.2019.097
    Zhong Jia, Yang Xibing, Zhu Peiyuan, Xu Shouli, Deng Xiaoliang, Tuo Lei, Li Xing, Song Peng, 2019. Porosity Evolution Differences of the Lingshui Formation Reservoir between Baodao and Changchang Sag, Qiongdongnan Basin. Earth Science, 44(8): 2665-2676. doi: 10.3799/dqkx.2019.097
    Citation: Zhong Jia, Yang Xibing, Zhu Peiyuan, Xu Shouli, Deng Xiaoliang, Tuo Lei, Li Xing, Song Peng, 2019. Porosity Evolution Differences of the Lingshui Formation Reservoir between Baodao and Changchang Sag, Qiongdongnan Basin. Earth Science, 44(8): 2665-2676. doi: 10.3799/dqkx.2019.097

    琼东南盆地宝岛-长昌凹陷陵水组储层差异演化特征

    doi: 10.3799/dqkx.2019.097
    基金项目: 

    国家科技重大专项 2016ZX05026-002

    中海石油(中国)有限公司自主立项项目 ZYKY-2018-ZJ-01

    详细信息
      作者简介:

      钟佳(1987-), 男, 工程师, 硕士, 主要从事沉积储层研究

    • 中图分类号: P618

    Porosity Evolution Differences of the Lingshui Formation Reservoir between Baodao and Changchang Sag, Qiongdongnan Basin

    • 摘要: 宝岛-长昌凹陷陵水组砂岩储集体目前是琼东南盆地油气勘探的重点目标.本文综合铸体薄片、激光粒度、元素地球化学、X衍射、扫描电镜、流体包裹体以及电子探针分析,探究宝岛凹陷北坡与长昌凹陷陵水组砂岩储层的成岩演化差异性.宝岛凹陷北坡的砂岩储层具有“粒度粗、稳定组分高”的强水动力特征,是海南岛物源体系下的三角洲沉积;而长昌凹陷砂岩储层具有“粒级偏细、泥质杂基重”的弱水动力特点,是神狐隆起、西沙隆起物源体系下的海底扇沉积.机械压实导致宝岛凹陷北坡的陵水组砂岩储层颗粒普遍呈现线状或凹凸接触.高热流背景导致长昌凹陷陵水组砂岩在海底以下浅埋条件(海底以下约1 400 m)下即可进入化学压实阶段,颗粒呈点-线接触,并伴生重晶石、片钠铝石等热液矿物.宝岛凹陷北坡存在早、晚两期烃类充注(14.5~10.0 Ma、2~0 Ma),期间被一期CO2充注分隔(7~3 Ma).长昌凹陷仅发育早期烃类充注(14.5~6.0 Ma),以及随后的一期CO2充注(5~0 Ma).陵水组砂岩储层演化在宝岛凹陷北坡总体以“海底以下缓慢深埋、缓慢升温”,天然气充注促进溶蚀和抑制胶结为特点,而长昌凹陷则以“海底以下浅埋、快速升温”,CO2持续充注促使碳酸盐或粘土或热液矿物胶结为特点.

       

    • 图  1  宝岛-长昌凹陷陵水组储集体分布与连井沉积相剖面

      Fig.  1.  The distribution and wells section of sedimentary facies of Lingshui formation reservior in Baodao-Changchang sag

      图  2  长昌凹陷陵水组与神狐隆起区稀土元素石标准化配分模式

      Fig.  2.  The chondrite-normalized REE pattern of Lingshui formation in Changchang sag and rocks in Shenhu uplift

      图  3  宝岛-长昌凹陷陵水组砂岩岩石类型

      Fig.  3.  Sandstone composition classification of Lingshui formation reservoir in Baodao-Changchang sag

      图  4  宝岛-长昌凹陷陵水组储层粒度C-M与典型粒度概率曲线

      Fig.  4.  C-M patterns and typical probability cumulative curves of Lingshui Formation Reservoir in Baodao-Changchang Sag

      图  5  宝岛-长昌区成岩阶段对比及对应莫霍面埋深

      Fig.  5.  The digenetic stage contrast and corresponding Moho surface depth in Baodao-Changchang area

      图  6  宝岛-长昌区陵水组储层成岩作用类型显微照片

      a.B-3, 4 104.5 m, 中-粗砂岩, 颗粒呈线接触, 石英次生加大, 壁心(-);b.W-1, 4 855.5 m, 细砂岩, 颗粒呈点-线接触, 石英次生加大, 壁心(-);c.B-3, 4 104.5 m, 中-粗砂岩, 长石与岩屑颗粒溶蚀, 壁心(-);d.W-1, 4 855.5 m, 细砂岩, 长石颗粒溶蚀、片丝状伊利石充填粒间, 扫描电镜, 壁心;e.B-3, 3 936.0 m, 中-粗砂岩, 片丝状伊利石充填颗粒之间, 扫描电镜, 壁心;f.B-3, 4 102.0 m, 中-粗砂岩, 连晶铁方解石胶结与铁白云石交代, 壁心(-);g.W-1, 4 920.0 m, 极细砂岩, 电子探针片, 背散射成像, 壁心;h.探针点1:重晶石, 探针点2:铁白云石;i.C-1, 3 360.8 m, 极细砂岩, 放射状片钠铝石, 壁心(-)

      Fig.  6.  Microphotographs showing digenesis of Lingshui Formation Reservoir in Baodao-Changchang area

      图  7  宝岛-长昌凹陷典型陵水组储层盐水包裹体均一温度及埋藏史

      Fig.  7.  The homogenization temperature of aqueous inclusions in typical Lingshui Formation Reservoir in Baodao-Changchang Sag and burial history

      图  8  宝岛凹陷北坡与长昌凹陷陵水组储层成岩-孔隙差异演化模式

      Fig.  8.  Variations in digenesis and pore evolution of Lingshui formation reservoir between Baodao sag′s Northern slope and Changchang sag

      表  1  宝岛-长昌凹陷陵水组储层岩石组分特征

      Table  1.   Parameters of sandstone components of Lingshui Formation Reservior in Baodao-Changchang Sag

      井号 粒度 砂体类型 岩石类型 单晶石英(%) 长石(%) 岩屑(%) 碳酸盐胶结物(%) 泥质杂基(%) 黏土矿物含量(%)
      多晶石英 花岗岩 变质岩 喷出岩 沉积岩 云母 伊利石 高岭石 绿泥石 伊蒙混层
      A-1 中、粗 三角洲 岩屑石英砂岩、长石岩屑砂岩 51.3 7.2 16.3 0.2 3.7 1.0 0 0.2 3.7 6.7
      D-1 48.5 9.9 15.0 0.6 4.2 1.0 0 0.3 6.3 3.3
      B-3 54.8 8.8 12.8 0.1 6.5 2.5 0 0.1 7.3 4.4 64.9 4.9 4.5 25.7
      W-1 粉、细 海底扇 岩屑石英砂岩 51.5 6.8 8.2 0 6.6 0.8 0 0.5 6.2 12.5 76.9 4.1 0.9 18.1
      下载: 导出CSV
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    • 收稿日期:  2019-01-23
    • 刊出日期:  2019-08-15

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