Pore structure and Mechanical Property Change of different rocks under nitrogen freezing
文献类型：会议论文
| 作者 | Shi X1; Zhang L1; Cheng YF1; Li BL2 ; Yang L(杨柳)1
|
| 出版日期 | 2017 |
| 会议日期 | June 25, 2017 - June 28, 2017 |
| 会议地点 | San Francisco, CA, United states |
| 关键词 | Carbonation Coal Compaction Compressive strength Elastic moduli Liquid nitrogen Liquids Mechanical properties Pore structure Rock mechanics Sandstone Shale Coal sample Freezing effect Hydraulic fracturing process Nitrogen treatment Sandstone samples Unconfined compressive strength Wellbore instability |
| 页码 | 666-671 |
| 英文摘要 | To better understand the liquid nitrogen freezing effect on different rocks, shale, coal, sandstone and carbonate were chosen to investigate the pore structure and mechanical properties damage before and after liquid nitrogen freezing. Experimental study shows that an increase in the number and volume of pores for all rocks after freezing. However, the influence of nitrogen freezing on carbonate was not obvious because of intense mineral compaction and poor connectivity of pores. There was also an obvious reduction in Young's modulus and unconfined compressive strength for coal. Especially, the average decrease ratio of Young's modulus was approximately 0.43 and the average decrease ratio of unconfined compressive strength was 0.63 after and before freezing for all coal samples, which reflected strong freezing damage capability of liquid nitrogen. The mechanical properties also clearly decreased after liquid nitrogen treatment for sandstone samples. Unpronounced changes in shale, and carbonate correlate with tight mineral compaction. These conclusions reflect the characteristics variations of pore structure and mechanical properties were influenced directly by the type of rock during liquid nitrogen freezing. Also, it can provide some insights for avoid wellbore instability during hydraulic fracturing process with liquid nitrogen. © 2017 American Rock Mechanics Association (ARMA). All rights reserved. |
| 会议录 | 51st US Rock Mechanics / Geomechanics Symposium 2017
 |
| 语种 | 英语 |
| ISBN号 | 9781510857582 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/78011]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.China University of Petroleum (Huadong), Qingdao, Shandong, China; 2.Institute of Mechanics, Chinese Academy of Sciences, Beijing, China |
| 推荐引用方式 GB/T 7714 | Shi X,Zhang L,Cheng YF,et al. Pore structure and Mechanical Property Change of different rocks under nitrogen freezing[C]. 见:. San Francisco, CA, United states. June 25, 2017 - June 28, 2017. |
入库方式： OAI收割
来源：力学研究所
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