石油学报 ›› 2009, Vol. 30 ›› Issue (3): 400-403.DOI: 10.7623/syxb2009014

• 油田开发 • 上一篇    下一篇

火山岩气藏不同岩性核磁共振实验研究

杨正明1,2, 郭和坤2, 姜汉桥1, 单文文2, 张玉娟2   

  1. 1. 中国石油大学石油天然气工程学院 北京 102249;
    2. 中国科学院渗流流体力学研究所 河北廊坊 065007
  • 收稿日期:2008-09-18 修回日期:2008-11-04 出版日期:2009-05-25 发布日期:2010-05-21
  • 作者简介:杨正明,男,1969年1月生,2004年获中国科学院博士学位,现为中国科学院渗流流体力学研究所高级工程师,主要从事渗流理论、低渗透油田和火山岩气藏开发方面的研究工作.E-mail:yzmhxj@263.net
  • 基金资助:

    国家重点基础研究发展规划(973)项目(2007CB209500);国家自然科学基金(No.10672187)联合资助

Experimental study on different lithologic rock of volcanic gas reservoir using nuclear magnetic resonance technique

YANG Zhengming1,2, GUO Hekun2, JIANG Hanqiao1, SHAN Wenwen2, ZHANG Yujuan2   

  1. 1. Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
    2. Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
  • Received:2008-09-18 Revised:2008-11-04 Online:2009-05-25 Published:2010-05-21

摘要:

利用核磁共振技术,并结合离心实验,确定出可动用流体对应的下限离心力为2.76MPa;由毛管力原理,计算出可动用喉道半径下限为0.05μm,确定了火山岩储层可动用下限实验标准。研究结果表明:火山岩储层不同岩性可动流体驰豫时间(T2)截止值与渗透率的关系与砂岩可动流体T2截止值的变化规律不同。火山岩岩样的可动流体T2截止值随渗透率增大而减小,并与裂缝发育程度相关。不同岩性可动流体T2截止值由大到小依次为流纹岩、熔结凝灰岩、晶屑凝灰岩、角砾熔岩、火山角砾岩。不同岩性火山岩储层岩样的可动流体百分数总体而言随渗透率的增大而增大,束缚水饱和度随渗透率的增大而减小。

关键词: 火山岩气藏, 可动流体, 岩性, 渗透率, 核磁共振技术, 离心实验

Abstract:

The low limit of centrifugal force for the movable fluid is 2.76MPa,which is determined by nuclear magnetic resonance(NMR)technique and laboratory experiment on centrifugal force of fluid.The low limit of throat radius for movable fluid is 0.05μm,which is figured out according to the capillary law.Those values are the experimental standard for determining the low limit of volcanic gas reservoir.The relation between T2 cutoff value of the movable fluid and permeability of different lithologic rocks of volcanic reservoir is different from that of sandstone reservoir.T2 cut off value of the volcanic rock movable fluid decreased with the increase of permeability and was related to the development of fracture.The order of the T2 cutoff value for the movable fluid of different lithologic rock is as follows:rhyolite,welded tuff,crystal tuff,breccia lava and volcanic breccia.The movable fluid percentage also increased with the permeability increase of different lithologic rock in the volcanic reservoir,while the saturation of irreducible water reduced with the increase of permeability.

Key words: volcanic gas reservoir, movable fluid, lithology, permeability, nuclear magnetic resonance technique, laboratory experiment on centrifugal force

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