瞬态压力脉冲法及其在松散含水合物沉积物中的应用

发布时间：2018-05-04 03:07

  本文选题：天然气水合物 + 松散沉积物　； 参考：《海洋地质与第四纪地质》2017年05期

【摘要】：含水合物沉积物渗透率是水合物开采相关工作的基础参数之一。稳态法在应用于渗透率较低的多孔介质时存在着稳定渗流难和试验耗时长等缺点。目前,含水合物细颗粒沉积物渗透率试验数据积累明显不足。本文首先介绍了瞬态压力脉冲法的基本原理及数据处理方法,然后以模拟试验验证了瞬态压力脉冲法的适用性,最后探讨了该方法在松散含水合物沉积物渗透率测量方面的应用效果。结果表明:瞬态压力脉冲法近似解处理粉细砂沉积物试验数据效果较好,而处理黏土沉积物试验数据存在明显误差,建议采用数值模拟反演分析的方法处理瞬态压力脉冲法试验数据;瞬态压力脉冲法适用于松散沉积物渗透率测量,在含水合物沉积物渗透率试验研究方面具有潜在的应用前景。
[Abstract]:The permeability of hydrate-bearing sediment is one of the basic parameters of hydrate mining. When the steady state method is applied to porous media with low permeability, it is difficult to steady seepage and takes a long time to test. At present, the accumulation of permeability test data of fine granular sediments containing hydrate is obviously insufficient. In this paper, the basic principle and data processing method of transient pressure pulse method are introduced, and the applicability of transient pressure pulse method is verified by simulation test. Finally, the application effect of this method in the measurement of permeability of loose hydrate-bearing sediments is discussed. The results show that the approximate solution of transient pressure pulse method is effective in treating silt sediment test data, but there are obvious errors in treating clay sediment test data. It is suggested that the method of numerical simulation and inverse analysis should be used to deal with the test data of transient pressure pulse method, which is suitable for the measurement of permeability of loose sediments and has a potential application prospect in the experimental study of hydrate sediment permeability.
【作者单位】： 国土资源部天然气水合物重点实验室中国地质调查局青岛海洋地质研究所;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;中国石油大学(华东)信息与控制工程学院;
【基金】：国家自然科学基金(11402131) 中国地质调查项目(DD20160216)
【分类号】：TE37
，

本文编号：1841301