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MU·02 · Mishra Petroleum & Gas Ltd
Two operated offshore blocks, and the measurement chain that turns what they produce into a number somebody will sign. As duty holder we carry the offshore obligation in full — and every barrel is allocated, metered and reported from a single system of record.
We hold operated interests across two basins, tied back to a shared host. Operating rather than merely holding an interest is a deliberate choice: it is the only way the group's rule — never own something you cannot run yourself — survives contact with an offshore asset.
As duty holder we carry the obligations that come with it: verified personnel on board, competence assurance for everyone who mobilises, and marine logistics reconciled against every contract. Those are not administrative overheads bolted onto production; they are the operation.
Hydrocarbon accounting — sometimes called production allocation, or informally hydrocarbon counting — is the discipline of turning measured flows into ownership. Commingled streams arrive at a host from several wells and sometimes several licence groups. Allocation and back-allocation apportion the measured total back to each contributing source so that entitlement, royalty and tax can be calculated.
We close mass balance daily across every commingled stream rather than monthly. A daily close means a discrepancy is investigated while the conditions that caused it are still known, instead of being reconstructed in a month-end scramble.
The fiscal meter is where volume becomes money. Custody transfer measurement is therefore held to a different standard from operational measurement, and the assurance work around it — uncertainty budgets, proving schedules, and mis-measurement investigation — is what makes a number defensible to a partner, an auditor or a regulator.
We maintain assurance across every export point, and treat a mis-measurement event as an incident with a root cause rather than an accounting correction.
Daily and monthly production reporting, regulatory submission and partner statements are generated from one allocation run. This matters more than it sounds: where reporting is assembled separately from allocation, the regulator, the partner and the internal ledger routinely receive three subtly different versions of the same month.
Lifting nominations, ullage reports and entitlement reconciled against contracted offtake. Liftings are the point where allocation, metering and contract meet, and where an error made three weeks earlier finally becomes visible.
Offshore crew, assets and contracts run on SubseaCore, the system of record we built for our own basins and now offer to other operators and contractors. It covers mobilisation and personnel-on-board verification, competence and certification, rig and asset operations, projects and contracts, payroll and billing, and offshore travel logistics — nine connected modules across five basins.
Its offshore travel routing searches Marine and General fare networks in parallel and stitches a combined itinerary when no single network covers a rotation, rather than defaulting to the more expensive option. More at subseacore.com, and the engineering behind it sits with Mishra Technologies.
The measurement chain
“A number nobody can trace is not a measurement. It is an opinion with a decimal point.”
From flow to signed number
01
Continuous measurement at the well and at every export point, with proving on schedule.
02
Commingled volumes apportioned back to each contributing source, daily.
03
Uncertainty budgets maintained; mis-measurement treated as an incident with a root cause.
04
Regulator, partner and internal ledger served from the same allocation run.
Questions
It is the process of turning measured production into ownership. Flows from several wells are commingled before measurement, so allocation and back-allocation apportion the measured total back to each contributing well, licence group and partner. It determines entitlement, royalty and tax, which is why the audit trail matters as much as the arithmetic.
Metering measures a physical quantity at a point. Allocation decides whose it was. Fiscal metering at custody transfer is where volume becomes money; allocation distributes that measured volume back across the sources that contributed to it.
Because a discrepancy found the next morning can be explained by people who remember the conditions that caused it. A discrepancy found at month end has to be reconstructed, and reconstruction is where unexplained variance becomes a permanent adjustment.
In several offshore regimes the duty holder is the party accountable for the safety case of an installation — for the people on it and the integrity of the facility — whether or not it also owns the licence. We operate rather than passively hold our interests, so we carry that obligation directly.
The software layer, yes — SubseaCore is available to operators and contractors outside the group, and Mishra Technologies builds allocation and compliance systems on commission. The producing interests themselves are held for our own account.
Continue
Talk to the desk that closes mass balance every morning rather than every month.