...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of natural gas science and engineering >Experimental and theoretical characterization of the natural gas migration and accumulation mechanism in low-permeability (tight) sandstone cores
【24h】

Experimental and theoretical characterization of the natural gas migration and accumulation mechanism in low-permeability (tight) sandstone cores

机译：低渗透（致密）砂岩岩心中天然气运聚机理的实验和理论表征

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The natural gas migration and accumulation properties of low-permeability (tight) sandstone are among the most important issues in the study of natural gas resource evaluation and exploitation. Understanding the internal mechanisms of these phenomena is critical to guiding the exploitation of natural gas resources and enhancing gas recovery. In this work, physical simulation experiments on gas migration and accumulation in natural tight sandstone cores are designed and implemented. The results show that the flow curve of steady gas migration is non-linear at a low pressure gradient and then becomes linear with the increase of the squared pressure gradient. The apparent permeability can be used to judge the ease of gas migration in tight sandstone, and the growth of apparent permeability can be divided into three stages (fast growth stage, slow growth stage, and stable stage) according to the level of the pressure gradient. The minimum migration pressure gradient (MMPG) is also determined from the gas displacement experiments. The terminal gas saturation of tight cores is distributed across a wide range of 18.73%-90.03%, and it correlates well with the permeability and MMPG: terminal gas saturation increases as the permeability increases or the MMPG decreases. Gas saturation also increases as the permeability and pressure gradient increase, but the rate of increase varies. (C) 2016 Elsevier B.V. All rights reserved.
机译：低渗（致密）砂岩的天然气运聚特性是天然气资源评价与开发研究中最重要的问题。了解这些现象的内部机制对于指导天然气资源开发和提高天然气采收率至关重要。在这项工作中，设计并实现了对天然气在天然致密砂岩岩心中运移和聚集的物理模拟实验。结果表明，在低压梯度下，稳定气体迁移的流动曲线是非线性的，然后随着压力梯度平方的增加而线性变化。表观渗透率可用于判断致密砂岩中气体运移的难易程度，表观渗透率的增长可根据压力梯度的高低分为三个阶段（快速增长阶段，缓慢增长阶段和稳定阶段）。 。最小迁移压力梯度（MMPG）也由气体驱替实验确定。致密岩心的末端气体饱和度分布在18.73％-90.03％的宽范围内，并且与渗透率和MMPG密切相关：随着渗透率的增加或MMPG的降低，末端气体饱和度增加。气体饱和度也随着渗透率和压力梯度的增加而增加，但是增加的速率是变化的。 （C）2016 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号