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    莺-琼盆地中新统高温超压储层特征及形成机制

    尤丽 招湛杰 代龙 吴仕玖 李才 徐守立

    尤丽, 招湛杰, 代龙, 吴仕玖, 李才, 徐守立, 2019. 莺-琼盆地中新统高温超压储层特征及形成机制. 地球科学, 44(8): 2654-2664. doi: 10.3799/dqkx.2019.108
    引用本文: 尤丽, 招湛杰, 代龙, 吴仕玖, 李才, 徐守立, 2019. 莺-琼盆地中新统高温超压储层特征及形成机制. 地球科学, 44(8): 2654-2664. doi: 10.3799/dqkx.2019.108
    You Li, Zhao Zhanjie, Dai Long, Wu Shijiu, Li Cai, Xu Shouli, 2019. Reservoirs Characteristics and Formation Mechanism of High Temperature and Overpressure Reservoirs from Miocene in Ying-Qiong Basin. Earth Science, 44(8): 2654-2664. doi: 10.3799/dqkx.2019.108
    Citation: You Li, Zhao Zhanjie, Dai Long, Wu Shijiu, Li Cai, Xu Shouli, 2019. Reservoirs Characteristics and Formation Mechanism of High Temperature and Overpressure Reservoirs from Miocene in Ying-Qiong Basin. Earth Science, 44(8): 2654-2664. doi: 10.3799/dqkx.2019.108

    莺-琼盆地中新统高温超压储层特征及形成机制

    doi: 10.3799/dqkx.2019.108
    基金项目: 

    中海石油(中国)有限公司自主立项项目“差异岩-场耦合的储盖层联控机制与有效储盖分布研究” ZYKY-2018-ZJ-01

    “十三五”国家重大专项“莺琼盆地高温压天然气富集规律与勘探开发关键技术(三期)” 2016ZX05024-005

    详细信息
      作者简介:

      尤丽(1983-), 女, 高级工程师, 博士, 主要从事沉积学与储层地质学研究

    • 中图分类号: P581

    Reservoirs Characteristics and Formation Mechanism of High Temperature and Overpressure Reservoirs from Miocene in Ying-Qiong Basin

    • 摘要: 中新统黄流-梅山组重力流、高温超压储层是南海北部莺-琼盆地中央坳陷带主力勘探层系,发育粉、细、中、粗砂岩与中、低、特低渗物性特征.通过研究高温超压储层特征,确定有利储层形成机制,为重点领域评价提供地质依据.结果表明,由东方到乐东区到乐东-陵水凹陷、由凹陷斜坡区到凹陷中心,由于地温梯度与异常超压形成时间、强度的变化,进入各成岩期深度加深,储层孔隙度纵向减小幅度不大,明显不同于斜坡区常压储层.沉积环境控制的储集岩粒度、泥质杂基与高温超压、热流体控制的成岩作用共同控制有利储层,以往凹陷方向发育早期超压保护的海底扇区为有利,凹陷斜坡区热流体作用形成大量次生孔隙,发育中渗“甜点”储层.

       

    • 图  1  莺-琼盆地构造区划图(a)与中新统梅山组沉积相图(b)

      Fig.  1.  Structural division and sedimentary facies from Meishan formation of Miocene in Ying-Qiong Basin

      图  2  莺-琼盆地中新统水道-海底扇储层岩石类型

      Q、F、L分别代表单晶石英、单晶长石和岩屑;H1、H2、M1、M分别代表黄流组一段、黄流组二段、梅山组一段、梅山组,下同

      Fig.  2.  Rock type of channel-submarine fan reservoir from Miocene in Ying-Qiong Basin

      图  3  莺-琼盆地中新统水道-海底扇储层特征显微照片

      a.极细-细粒石英砂岩,点-线接触,粒间孔为主(X2-1井,2 984.00 m,H1,单偏光);b.极细砂岩,点-线接触,粒间孔与粒内溶孔(Y2-1井,3 852.00 m,H2,单偏光);c.中-细砂岩,线接触,粒间孔与粒内溶孔(A2-1井,3711.50 m,H1,单偏光);d.粗-中砂岩,线、凹凸-线接触,粒间溶孔、粒内溶孔(A2-1井,3 884.00 m,H2,单偏光);e.中砂岩,粒内溶孔与粒间溶孔,凹凸-线接触(A2-1井,4 136.40 m,M1,单偏光);f.粉-极细砂岩,铸模孔为主,线接触为主(B-7井,3 892.89 m,H2,单偏光);g.极细砂岩,点-线接触,粒间孔为主(S-2井,3 800.78 m,M,单偏光);h.中-粗砂岩,线-凹凸接触,粒间孔与粒间溶孔(C-1井,3 968.00 m,M,单偏光);i.砂砾岩,线接触,粒间孔发育(B-2井,4 821.25 m,M,单偏光);j.极细-细砂岩,少量粘土矿物堵塞孔隙(Y2-1井,3 871.00 m,H1,正交光);k.极细-细砂岩,大量粘土矿物堵塞孔隙(B-7井,3 701.70 m,H2,正交光);l.中-粗砂岩,溶蚀孔发育,铁白云石充填(A1-6井,4 310.50 m,H2,单偏光)

      Fig.  3.  Microphotos of channel-submarine fan reservoir from miocene in Ying-Qiong Basin

      图  4  莺-琼盆地中央坳陷带钻井成岩阶段划分

      Fig.  4.  Diagenesis stage devision of the central depression zone in Ying-Qiong Basi

      图  5  莺歌海盆地东方-乐东区中新统黄流组储层重矿物组合与储层参数对比

      a.东方区西物源区储层重矿物组合; b.东方区东物源区储层重矿物组合; c.东方区西物源区储层参数; d.东方区东物源区储层参数; e.乐东区东物源区储层重矿物组合

      Fig.  5.  Heavy mineral assemblages and reservoir parameters comparison from Huangliu Formation of the mesozoic in Dongfang-Ledong area of Yinggehai Basin

      图  6  莺-琼盆地中央坳陷带储层实测孔隙度与声波时差变化

      Fig.  6.  Reservoir porosity and acoustic time difference evolution in the central depression of Ying-Qiong Basin

      图  7  莺歌海盆地东方-乐东区成岩模式

      Fig.  7.  Diagenetic model of Dongfang-Ledong area in Yinggehai Basin

      表  1  莺-琼盆地中央坳陷带中新统储层参数对比表

      Table  1.   Reservoirs parameters of miocene in the central depression of Ying-Qiong Basin

      构造 层位 埋深(m) 平均压力系数 平均流体压力(MPa) 平均地温梯度(℃/km) 粒级 孔隙度(%) 孔隙度评价 渗透率(mD) 渗透率评价
      东方X1区 H1 2 687~3 213 1.93 54.6 38.7 粉、极细、细 6.6~22.7/17.3 低-中孔 0.05~90.4/5.7 低渗为主
      东方X2区 2 750~3 455 1.71 53.2 38.8 极细、细 4.3~21.0/15.6 0.1~344.6/33.7 中渗为主
      东方Y2区 H2 3 820~3 890 2.17 82.1 40.0 极细 9.7~16.9/14.9 中-低孔 0.1~1.8/0.9 低-特低渗
      乐东A区 H1 3 710~3 763 1.70 62.5 36.6 14.2~16.8/15.7 中孔 0.7~4.7/2.2 中孔、低渗
      H2 3 850~4 340 1.96 76.8 38.0 细、中、粗 0.9~16.2/8.2 低-特低孔 0.05~33.70/1.60 特低、低、中渗
      M1 4 057~4 175 2.21 88.6 39.2 粗~中 0.03~15.80/9.10 低-特低孔 0.05~8.10/0.5 低-特低渗
      乐东B区 H2 3 700~3 900 2.13 79.2 42.9 极细 16.7~20.4/19.3 中孔 0.1~0.9/0.3 特低渗
      陵水S区 M 3 432~3 940 1.86 67.2 35.4 粉、极细 10.2~26.1/19.6 低-中孔 0.05~26.90/4.600 中、低、特低渗
      崖城C区 3 899~4 023 1.85 71.6 36.8 中~粗 1.3~19.7/13.7 低孔为主 0.1~4.6/1.6 低渗为主
      崖城B区 4 817~4 835 1.85 87.4 40.0 粗、砂砾 2.5~13.1/6.8 低-特低孔 0.01~9.10/0.90 低-特低渗
      下载: 导出CSV
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    • 收稿日期:  2019-01-15
    • 刊出日期:  2019-08-15

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