水合物沉积物动态弹性力学参数试验研究  

Experiment and Research on the Dynamic Elastic Mechanical Parameters for Sedimental Hydrates

作　　者：孙晓杰[1,2] 程远方[1] 李令东[1] 崔青[1] 赵寿强[1] 姚海元 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266555 [2]天津中油渤星工程科技有限公司,天津300451 [3]中海石油研究中心技术研究部,北京100027

出　　处：《石油钻探技术》2011年第5期41-44,共4页Petroleum Drilling Techniques

基　　金：国家科技重大专项"大型油气田及煤层气开发"子课题"水合物区钻探过程风险评价技术"(编号:2008ZX05026-04-011)部分研究内容

摘　　要：水合物沉积物的声学特性是水合物藏资源评估、水合物地层钻探开发的重要依据,而目前实际原状取心难度大、成本高,故通过试验的方法对该问题进行研究具有重要意义。利用中国石油大学岩石力学实验室自主设计开发的水合物声波原位测量系统,在不同围压条件下对不同水合物饱和度的原位合成沉积物岩样进行了声波测试,并根据弹性理论,利用所测得的超声波波速,计算得到试样的动弹性力学参数。结果表明:水合物沉积物的纵横波速以及动态弹性模量均随着围压、水合物饱和度的增大而增大。The acoustic characteristics of the hydrates are the fundamental parameters of gas hydrates exploration and evaluations.Due to the coring of gas hydrates is very difficult and expensive,the experiment method to study it has a great significance.The rock mechanics laboratory of China University of Petroleum had designed and developed measuring system for hydrate acoustic wave,the acoustic waves of hydrates were tested with the change of saturation under different confining pressure.According to elasticity theory,the dynamic elastic mechanical parameters were obtained using the measured ultrasonic wave velocity.The results show that velocity of longitudinal and shaear waves as well as dynamic elastic modulus increased with the increase of confining pressure and hydrate saturation.

关 键 词：天然气水合物 沉积物 声学性质 饱和度 围压 动态弹性力学参数 

分 类 号：P589[天文地球—岩石学]