Next Article in Journal
Active Participation of Air Conditioners in Power System Frequency Control Considering Users’ Thermal Comfort
Previous Article in Journal
ANN-Based Prediction and Optimization of Cooling System in Hotel Rooms
Article Menu

Export Article

Open AccessArticle
Energies 2015, 8(10), 10796-10817; doi:10.3390/en81010796

Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System

1,2
,
3
and
1,2,*
1
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
2
College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China
3
Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Academic Editor: Richard Coffin
Received: 31 August 2015 / Revised: 16 September 2015 / Accepted: 23 September 2015 / Published: 28 September 2015
View Full-Text   |   Download PDF [3685 KB, uploaded 28 September 2015]   |  

Abstract

The main purpose of this study is to investigate the production behaviors of gas hydrate at site DK-2 in the Qilian Mountain permafrost using the novel five-spot well (5S) system by means of numerical simulation. The whole system is composed of several identical units, and each single unit consists of one injection well and four production wells. All the wells are placed horizontally in the hydrate deposit. The combination method of depressurization and thermal stimulation is employed for hydrate dissociation in the system. Simulation results show that favorable gas production and hydrate dissociation rates, gas-to-water ratio, and energy ratio can be acquired using this kind of multi-well system under suitable heat injection and depressurization driving forces, and the water production rate is manageable in the entire production process under current technology. In addition, another two kinds of two-spot well (2S) systems have also been employed for comparison. It is found that the 5S system will be more commercially profitable than the 2S configurations for gas production under the same operation conditions. Sensitivity analysis indicates that the gas production performance is dependent on the heat injection rate and the well spacing of the 5S system. View Full-Text
Keywords: gas hydrate; depressurization; thermal stimulation; five-spot well; Qilian Mountain permafrost gas hydrate; depressurization; thermal stimulation; five-spot well; Qilian Mountain permafrost
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Liang, Y.-P.; Li, X.-S.; Li, B. Assessment of Gas Production Potential from Hydrate Reservoir in Qilian Mountain Permafrost Using Five-Spot Horizontal Well System. Energies 2015, 8, 10796-10817.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top