RE: Well said….13 Sep 2025 15:39
🧪 Could Acidisation Work in the Lower Zones of the Ingomar Zone?
Yes — acidisation could potentially work in the lower zones of the Ingomar Zone, but its effectiveness depends on several geological and operational factors:
🧭 Key Considerations
1. Lithology of the Ingomar Zone
If the lower Ingomar is composed of carbonates (e.g., dolomite or limestone), acidisation is likely to be effective.
If it's more shale-rich or siliceous, acidisation may have limited impact unless tailored acid blends (e.g., mud acid with HF) are used.
2. Formation Damage
If drilling or completion fluids caused near-wellbore damage, acidisation can help restore permeability.
Acid can dissolve fines, clays, or precipitates that block pore spaces.
3. Porosity and Permeability
Acidisation is most effective in low-permeability zones where natural flow is restricted.
If the lower Ingomar has tight rock, acidisation may help create micro-flow paths or wormholes.
4. Previous Results
If other zones in the Rudyard Field responded well to acidisation (like Inez #1), that’s a positive indicator.
However, each zone can behave differently — core samples or logs should guide the decision.
⚠️ Risks to Watch
Over-acidisation can damage the formation or cause fines migration.
Compatibility with casing and completion materials must be checked to avoid corrosion.
Regulatory limits in Montana may restrict acid volumes or types.