Michael Langford

Michael Langford*3, Tayo Fagade1, , Dora Piedrahita 1,
Nicolas Camelo 1, Elkin Colorado1, Cesar Patino2
 
1Expro, Broadfield Blvd.  Houston, 77084. USA & Expro, Bogota, Colombia   
2Ecopetrol, Bogota, Colombia
3 Expro, UK
 
 
Abstract:
 
We present a comparison of different sample containers for soil vapor sampling for subsequent hydrogen analysis, during exploration for white hydrogen resources across Colombia.
 
Using real-world data obtained during sampling campaigns carried out across Ecopetrol assets in Colombia, we evaluate hydrogen recovery rates between low-pressure aluminum sample cylinders (110cc) and larger, higher-pressure stainless-steel cylinders (300-500cc). Laboratory measurements are compared with those obtained in the field using portable equipment. A description of the novel sampling process is also described. Further comparison is made with existing published literature.
 
Our work shows that the smaller aluminum cylinders are at least as effective as the stainless-steel vessels in capturing and preserving hydrogen samples, contrary to some previously published work. However, the lower sample volume (especially at low pressure) proved limiting when extensive analysis programs were required.
 
Whilst the study uses data obtained from soil vapor sampling, it is relevant to all hydrogen sampling operations and should be considered when designing sampling and analysis programs for future work.
 
 
* Corresponding Author and Speaker. Email: Michael.langford@expro.com