MAASP and MOASP monitoring in one integrity workspace
Store maximum allowable (MAASP) and maximum operating (MOASP) annulus surface pressure limits per well, compare every annulus reading against them automatically, and keep exceptions and follow-up actions with the wells that need them.
Limit monitoring that engineers can act on
Different operators use MAASP, MOASP, or both. Well Integrity Ops supports the terminology your team already uses, with readings checked against the operating envelope as they come in.
Limits stored per well
Keep maximum annulus pressures for annuli A–D on each well integrity record, so the envelope travels with the well it protects.
Automatic comparison
Annulus pressure readings are shown against their limits at entry — no side-by-side spreadsheet lookups to spot an exceedance.
Exceptions surfaced in diagnostics
WIDR diagnostics list wells with annulus pressure above the operating limit, so exceedances reach the weekly review with context attached.
Follow-up stays attached
Capture planned actions, priorities, and operator notes on the affected well when a limit exception needs investigation.
Review-ready context
Pull pressures, limits, and recent notes into diagnostics and reports without rebuilding the picture in Excel.
Defensible history
Limit values, readings, and responses are all audit-logged, so the record of an exceedance and how the team handled it stands up later.
MAASP vs MOASP: what each limit means
MAASP — maximum allowable annulus surface pressure — is the highest pressure an annulus can safely sustain at surface without risking the weakest exposed barrier element: casing, cement, or a wellhead seal. It is derived from barrier strength and frames the allowable envelope.
MOASP — maximum operating annulus surface pressure — is the practical operating boundary used in day-to-day surveillance, typically set below MAASP with a safety margin. It is the number an engineer checks a reading against during routine monitoring.
Both matter for well integrity: one defines what the well can tolerate, the other defines when surveillance should trigger a response. The failure mode in most teams is not that these limits are unknown — it is that they live in a reference file separate from the readings, so comparisons happen late or not at all.
How Well Integrity Ops keeps limits in the workflow
- Store per-well limits for annuli A–D on the well integrity record
- Compare annulus pressure readings against limits automatically at entry
- Highlight wells above the operating limit in WIDR diagnostics
- Attach notes and planned actions to the affected wells
- Carry limit context into integrity reports with full traceability
MAASP and MOASP monitoring FAQ
What is MAASP?
MAASP stands for maximum allowable annulus surface pressure — the highest pressure an annulus can safely sustain at surface without risking damage to the weakest exposed barrier element, such as casing, cement, or a wellhead seal. It frames the allowable envelope for each annulus.
What is the difference between MAASP and MOASP?
MAASP is the safe upper bound derived from barrier strength. MOASP — maximum operating annulus surface pressure — is the practical operating boundary used in day-to-day surveillance, typically set below MAASP with a safety margin. Different operators use one term, the other, or both.
How does Well Integrity Ops use these limits?
Limits are stored per well on the well integrity record for annuli A through D. When annulus pressure readings are entered, the system shows them against these limits so exceptions are visible immediately, and WIDR diagnostics list wells with pressure above the operating limit.
Keep MAASP and MOASP limits in the workflow
Explore the demo to see limit comparison, exceptions, and integrity follow-up in one place.