西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

典型盐岩力学特性分析

完颜祺琪1,2,3 *,沈雪明4,垢艳侠2,3,冉莉娜2,3   

  1. 1. 西南石油大学地球科学与技术学院,四川成都610500;2. 中国石油勘探开发研究院廊坊分院,河北廊坊065007;
    3. 中国石油天然气集团公司油气地下储库重点实验室,河北廊坊065007;4. 长江大学非常规油气湖北省协同创新中心,湖北武汉430100
  • 出版日期:2016-02-01 发布日期:2016-02-01
  • 通讯作者: 完颜祺琪,E-mail:wanyanqq@petrochina.com.cn

The Analysis of the Mechanical Properties of Typical Salt Rock

WANYAN Qiqi1,2,3*, SHEN Xueming4, KOU Yanxia2,3, RAN Lina2,3   

  1. 1. School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Langfang Branch,PetroChina Research Institute of Petroleum Exploration & Development,Langfang,Hebei 065007,China
    3. CNPC Key Laboratory of Oil & Gas Underground Storage Engineering,Langfang,Hebei 065007,China
    4. Hubei Cooperative Innovation Center of Unconventional Oil and Gas,Yangtze University,Wuhan,Hubei 430100,China
  • Online:2016-02-01 Published:2016-02-01

摘要:

通过单轴、三轴压缩实验及劈裂等实验研究了湖北云应、江苏淮安和河南平顶山3 个地区层状盐矿岩样的短
期力学特性,并对不同地区及不同深度地层的纯盐岩力学特性进行比较分析。结果表明:(1)3 地区中单轴抗压强度
和弹性模量最大的岩样为泥岩和含泥岩的盐岩,而其泊松比却是最小的,证明了泥岩变形性能差的特性。含有不同杂
质的盐岩其抗压强度和弹性模量有所增加,其泊松比对杂质的变化不是太敏感。纯盐岩抗压强度、弹性模量和泊松比
随地层深度的增加而增大,取自较浅地层的岩样单轴实验有明显的压密阶段。(2)不同地区的岩样都有随围压的增大
峰值强度相应增大的规律。纯盐岩的内摩擦角基本都大于其他岩样的值,而黏聚力则都小于其他岩样的值。反映了纯
盐岩晶体颗粒大,含杂质少的特点。(3)不同地区的纯盐岩相对于其他岩样的抗拉强度最小。

关键词: 盐岩, 泊松比, 弹性模量, 抗拉强度

Abstract:

It is studied the short term mechanical properties of samples of bedded salt in Yunying Hubei,Huaian Jiangsu and
Pingdingshan Henan by doing experiments of monopodium and triaxial compression and splitting. It also compares stratums
in different district and different depth of the pure salt rock mechanical properties. The results showed that(1)the rocks in
different area which have the biggest uniaxial compressive strength and modulus of elasticity and the smallest Poisson ratio
belong to mudstone and mud salt rock. It indicated that mudstone has bad deformation properties. The salt rock which has
different impurity will increase its compressive strength and modulus of elasticity,and its Poisson ratio is not sensitive to the
change of impurity. The compressive strength,modulus of elasticity and Poisson ratio of the pure salt rock increases with
increase of the depth of stratum,the rocks from the shallow layer in uniaxial tests have obvious compression phase.(2)the
sample in different regions increases as confining pressure peak intensity increase. The comparison of the internal friction
angle and cohesive value for different sample in different regions can be obtained,and the internal friction angle of the pure
salt rock are greater than those of other values,but the cohesion are smaller than other sample value,reflecting that the crystal
particles of pure salt rock are big,and contain less impurity.(3)the tensile strength of the pure salt rock in different regions
relative to the other samples is minimum.

Key words: salt rock;poisson&prime, s ratio;elastic modulus;tensile strength

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