scholarly journals The NPE gas tracer test and the development of on-site inspection techniques

10.2172/72736 ◽  
1995 ◽  
Author(s):  
C. Carrigan ◽  
R. Heinle ◽  
J.J. Zucca
Keyword(s):  
Tracer Test ◽  
On Site Inspection ◽  
Inspection Techniques ◽  
Gas Tracer

Reservoir Description Insights from Inter-well Gas Tracer Test

2019 ◽  
Author(s):  
Abdulaziz Al-Qasim ◽  
Sunil Kokal ◽  
Sven Hartvig ◽  
Olaf Huseby
Keyword(s):  
Tracer Test ◽  
Reservoir Description ◽  
Gas Tracer

Simulation-assisted gas tracer test study of Tarim Yaha gas-condensate reservoir in China

2017 ◽  
Vol 48 ◽  
pp. 77-84
Author(s):  
Yonghong Wang ◽  
Binshan Ju ◽  
Wenlong Chen ◽  
Kai Zhang ◽  
Yu Ye
Keyword(s):  
Tracer Test ◽  
Gas Condensate ◽  
Test Study ◽  
Condensate Reservoir ◽  
Gas Tracer

Measuring seasonal variations of moisture in a landfill with the partitioning gas tracer test

2006 ◽  
Vol 26 (4) ◽  
pp. 344-355 ◽  
Author(s):  
Byunghyun Han ◽  
Behnam Jafarpour ◽  
Victoria N. Gallagher ◽  
Paul T. Imhoff ◽  
Pei C. Chiu ◽  
...  
Keyword(s):  
Seasonal Variations ◽  
Tracer Test ◽  
Gas Tracer

A Field Case Study of an Interwell Gas Tracer Test for GAS-EOR Monitoring

2017 ◽  
Author(s):  
Modiu Sanni ◽  
Mohammad Abbad ◽  
Sunil Kokal ◽  
Razally Ali ◽  
Ibrahim Zefzafy ◽  
...  
Keyword(s):  
Tracer Test ◽  
Field Case ◽  
Gas Tracer

Field Application of Partitioning Gas Tracer Test for Measuring Water in a Bioreactor Landfill

2007 ◽  
Vol 41 (1) ◽  
pp. 277-283 ◽  
Author(s):  
Byunghyun Han ◽  
Paul T. Imhoff ◽  
Ramin Yazdani
Keyword(s):  
Tracer Test ◽  
Field Application ◽  
Bioreactor Landfill ◽  
Gas Tracer

Application of Non-Destructive Techniques in the Inspection of the Wooden Roof of Historic Buildings: A Case Study

2013 ◽  
Vol 778 ◽  
pp. 233-242 ◽  
Author(s):  
M. Jesús Morales-Conde ◽  
Carmen Rodríguez-Liñán ◽  
Paloma Rubio de Hita
Keyword(s):  
Conservation Status ◽  
Historic Buildings ◽  
High Moisture Content ◽  
High Moisture ◽  
On Site Inspection ◽  
Inspection Techniques ◽  
Wooden Structures ◽  
Non Destructive ◽  
Non Destructive Techniques

The aim of this paper is to show the results of applying non-destructive inspection techniques (thermography, ultrasounds and microdrilling) during the inspection works of a protected building. These non-destructive techniques have been applied in the inspection of the wooden roof to identify deterioration, density loss and defects as a means of assessing its conservation status. This work concludes that the union of these nondestructive techniques constitutes an accurate diagnostic tool for the on-site inspection of wooden structures and the evaluation of their conditions. Thermography allows to distinct moisture contents while ultrasound detects density loss in areas of the wood with high moisture content.

Spatial Variability of Contaminant Transport in a Fractured Till, Avedøre Denmark

1999 ◽  
Vol 30 (4-5) ◽  
pp. 333-360 ◽  
Author(s):  
Larry McKay ◽  
Johnny Fredericia ◽  
Melissa Lenczewski ◽  
Jørn Morthorst ◽  
Knud Erik S. Klint
Keyword(s):  
Hydraulic Conductivity ◽  
Spatial Variability ◽  
Field Experiment ◽  
Contaminant Transport ◽  
Tracer Test ◽  
Conductivity Measurements ◽  
Fine Grained ◽  
Downward Migration ◽  
Rapid Transport ◽  
High Degree

A field experiment shows that rapid downward migration of solutes and microorganisms can occur in a fractured till. A solute tracer, chloride, and a bacteriophage tracer, PRD-1, were added to groundwater and allowed to infiltrate downwards over a 4 × 4 m area. Chloride was detected in horizontal filters at 2.0 m depth within 3-40 days of the start of the tracer test, and PRD-1 was detected in the same filters within 0.27 - 27 days. At 2.8 m depth chloride appeared in all the filters, but PRD-1 appeared in only about one-third of the filters. At 4.0 m depth chloride appeared in about one-third of the filters and trace amounts of PRD-1 were detected in only 2 of the 36 filters. Transport rates and peak tracer concentrations decreased with depth, but at each depth there was a high degree of variability. The transport data is generally consistent with expectations based on hydraulic conductivity measurements and on the observed density of fractures and biopores, both of which decrease with depth. Transport of chloride was apparently retarded by diffusion into the fine-grained matrix between fractures, but the rapid transport of PRD-1, with little dispersion, indicates that it was transported mainly through the fractures.

Mixing and Detention Time Distribution in Activated Sludge Tanks

1985 ◽  
Vol 17 (2-3) ◽  
pp. 197-208 ◽  
Author(s):  
H. Bode ◽  
C. F. Seyfried
Keyword(s):  
Activated Sludge ◽  
Time Distribution ◽  
Strong Influence ◽  
Tracer Tests ◽  
Tracer Test ◽  
Evaluation Procedure ◽  
Response Curves ◽  
Detention Time ◽  
Test Study ◽  
Mixing Characteristics

The interrelationship between mixing characteristics and tracer response curves in activated sludge tanks is explained. In some cases the return sludge cycle has a strong influence on the tracer response curves. Results from tracer tests in the field are hard to interpret because the tracer in the return sludge interferes with the initial tracer. Therefore a special evaluation procedure has to be applied. The paper closes with results from a field tracer test study.

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