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神木气田太原组低品质气藏储层微观特征及形成机理

张涛 巩肖可 黄朝 曹青赟 孟凤鸣 董占民 陈朝兵 王恒力

张涛, 巩肖可, 黄朝, 曹青赟, 孟凤鸣, 董占民, 陈朝兵, 王恒力. 神木气田太原组低品质气藏储层微观特征及形成机理[J]. 石油实验地质.
引用本文: 张涛, 巩肖可, 黄朝, 曹青赟, 孟凤鸣, 董占民, 陈朝兵, 王恒力. 神木气田太原组低品质气藏储层微观特征及形成机理[J]. 石油实验地质.
ZHANG Tao, GONG Xiaoke, HUANG Chao, CAO Qingyun, MENG Fengming, DONG Zhanmin, CHEN Zhaobing, WANG Hengli. Micro characteristics and formation mechanism of low-quality gas reservoirs in Taiyuan Formation of Shenmu Gas Field[J]. PETROLEUM GEOLOGY & EXPERIMENT.
Citation: ZHANG Tao, GONG Xiaoke, HUANG Chao, CAO Qingyun, MENG Fengming, DONG Zhanmin, CHEN Zhaobing, WANG Hengli. Micro characteristics and formation mechanism of low-quality gas reservoirs in Taiyuan Formation of Shenmu Gas Field[J]. PETROLEUM GEOLOGY & EXPERIMENT.

神木气田太原组低品质气藏储层微观特征及形成机理

基金项目: 

国家自然科学基金(41802140)、国家科技重大专项(2016ZX05050006)、陕西省自然科学研究基础计划项目(2019JQ-257)和刘宝珺地学科学基金(DMSM2019007)联合资助。

详细信息
    作者简介:

    张涛(1984-),男,高级工程师,从事天然气开发地质工作。E-mail:ztao3_cq@petrochina.com.cn。

    通讯作者:

    陈朝兵(1984-),男,副教授,从事储层评价及成藏机理研究。E-mail:zbchen@xsyu.edu.cn。

  • 中图分类号: TE122.23

Micro characteristics and formation mechanism of low-quality gas reservoirs in Taiyuan Formation of Shenmu Gas Field

  • 摘要:

    鄂尔多斯盆地神木气田与周边气田开发效果差异较大,表现出低品质气藏特征,给气田勘探部署及持续稳产带来一定困扰。为了揭示低品质气藏成因,基于不同尺度微观实验手段,对神木气田太原组储层开展了微观特征及形成机理研究。结果表明,神木气田太原组储层具有"富石英、贫长石、岩屑含量较高"的特征,发育小孔-细喉型孔喉组合,孔喉连通性较差,储渗能力较弱,为低孔-超低渗致密砂岩储层;太原组低品质储层的形成受杂基、喷发岩岩屑含量及成岩作用的共同影响。储层在形成过程中,受晚石炭世-早二叠世鄂尔多斯盆地北部内蒙古古隆起火山活动的影响明显,砂岩内喷发岩岩屑和杂基含量普遍较高,喷发岩岩屑为次生孔隙的发育提供了主要物质基础,杂基在堵塞孔隙的同时也产生了一定数量杂基溶孔,对储层的影响具有双重性。成岩过程中的溶蚀作用对于太原组储层的形成至关重要,增孔效应占现今孔隙度的64.3%。晚白垩世末期,燕山运动末幕导致鄂尔多斯盆地构造反转,气水重新调整,盆地东部天然气沿断裂部分逸散,最终形成了现今神木气田太原组的低品质气藏。神木气田下一步勘探重点应在摸清成岩作用宏观展布规律及有利岩性圈闭的基础上,寻找高含量喷发岩岩屑和低含量杂基的发育区。

     

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