field sampling and your bottom line · 2018-02-28 · analysis and associated calcinations are...

Field Sampling and Your Bottom Line

Operating Cost Reductions

Increase in operations moving to self sampling Things to be aware of:

•Sample containers •Field H2S determination •Impact of sampling procedures

The “Creative” Sample Container

Field H2S Determination

• H2S will degrade in metal cylinders • Stain tubes and Iodine have expiry dates • Have seen wells turn sour from 0 to >1000

ppm in a matter of months

Sampling Case Study

•Same sample point •Same day •Same field staff •Two different sampling techniques

•Two cylinders taken properly (P1, P2) •Two cylinders taken improperly by purging through the cylinder (I3, I4)

Proper Sampling Results

Improper Sampling Results

Compositional Summary

0.0000

0.1000

0.2000

0.3000

0.4000

0.5000

0.6000

0.7000

H2 He N2 CO2 H2S C1 C2 C3 iC4 nC4 iC5 nC5 C6 C7+

Correct 1

Incorrect 1

Correct 2

Incorrect 2

Gas Properties

P1 P2 I3 I4 Heating Value 52.40 52.55 55.62 53.75 Gas Compressibility 0.9925 0.9925 0.9900 0.9916 Relative Density 0.882 0.883 0.934 0.900

1% RD exemption is affected by sampling in this case study

Historical Data

Thank You