SYNTHETIC DATA / FICTIONAL WELL / PUBLIC DEMONSTRATION
From a well file
to a clear diagnostic.
One small, invented well shows the complete data-diagnostic handoff: what arrived, what the checks found, how the missing value is handled, and what the reviewing petrophysicist receives.
01 / SOURCE
Keep the original measurements.
The source declares depth in metres, a 0.5 m step, and −999.25 as its null marker. The diagnostic preserves those source values. No curve selection or geological interpretation is needed to describe this single-source inventory.
| Depth m | GR API | RHOB g/cm³ | NPHI V/V | RT ohm·m |
|---|---|---|---|---|
| 1000 | 42 | 2.41 | 0.18 | 12.5 |
| 1000.5 | 45 | 2.38 | 0.2 | 10.2 |
| 1001 | Missing | 2.35 | 0.22 | 8.4 |
| 1001.5 | 88 | 2.29 | 0.27 | 3.1 |
| 1002 | 96 | 2.26 | 0.29 | 2.4 |
“Missing” displays the declared source null; it is not an estimated value. Unit labels are presented in readable notation without changing measurements.
02 / FINDINGS
One gap, clearly located.
Gamma ray has four valid samples out of five: 80% coverage across two separate segments. Density, neutron porosity and resistivity each have five valid samples. Declared units are recorded alongside every curve.
Leave the gamma-ray value at 1,001 m missing. Exclude that value from numeric summaries and carry the gap into the handoff. Do not interpolate, splice, shift depth or substitute another measurement.
03 / HANDOFF
A concise result to work from.
The diagnostic package contains the unchanged synthetic LAS, a readable data table, a curve inventory and a report explaining the gap and its handling. The receiving petrophysicist can decide whether additional source evidence is needed before interpretation.
This is a completed demonstration of data inventory and null handling. It does not calculate lithology, saturation, net pay or reserves, and it is not an expert-approved customer interpretation.
Start with the decision, the preparation task and the receiving reviewer. Contact XZH before sharing confidential files.