Reviewed September 2026 against ADNOC, Wikipedia, and Global Energy Monitor (GEM.wiki).

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The Asab oil field in Abu Dhabi holds proven crude oil reserves cited at 3.6 billion barrels (507 million tonnes), according to Wikipedia’s sourcing of ADNOC data. Current production capacity sits at 450,000 barrels per day, per ADNOC’s own site, with a project underway to lift that to 480,000 barrels per day. This page lays out where each of those numbers comes from, what they mean, and exactly how to verify them yourself before you cite them anywhere.

Table of Contents

• Asab Oil Field Reserves: The Billion-Barrel Number, Sourced
• Where Asab Is: Abu Dhabi Location and Field Basics
• Asab Oil Field Production: Barrels Per Day, Then and Now
• Who Owns Asab: ADNOC, BP, and TotalEnergies Stakes
• History: Discovery in 1965 to Commercial Production in 1970
• The SAS Project: 30,000 Extra Barrels a Day
• How to Verify These Figures Yourself
• Reserves-to-Production Runway Calculator
• Beyond Oil: Satellite Intelligence for Mineral Exploration
• FAQs: Asab Oil Field Reserves and Production
• Conclusion: What’s Solid and What Isn’t
• Try it: Run your own numbers

Asab Oil Field Reserves: The Billion-Barrel Number, Sourced

The figure searched most often — “asab oil field reserves billion barrels” — has one clear, citable answer: 3.6 billion barrels of proven crude oil, equivalent to 507 million tonnes, as reported by Wikipedia’s Asab oil field entry, which draws on ADNOC source material. That is the number to use if you need a single, current reserve estimate for Asab.

There is an older, much larger figure in circulation: Global Energy Monitor’s Asab profile notes a 1993 estimate of 10.5 billion barrels. That number is more than three decades old and reflects an early-life estimate before three decades of extraction and re-assessment. If you see 10.5 billion barrels quoted as a current figure anywhere, it is out of date — the 3.6 billion barrel figure is the one aligned with ADNOC’s present-day disclosures, per Global Energy Monitor’s Asab field page.

Neither source states the exact assessment year behind the 3.6 billion barrel figure — it could be anywhere from the mid-2010s to the early 2020s vintage. That is a real gap, not an oversight on our part, and it means the number should be treated as ADNOC’s most recently disclosed public estimate rather than a figure pinned to a specific audit date. If you need the vintage for a report or citation, ADNOC’s own investor and corporate disclosures at adnoc.ae are the place to request or find that detail; Wikipedia and GEM do not carry it.

In tonnage terms, 3.6 billion barrels converts to roughly 507 million tonnes of crude — the conversion ADNOC and Wikipedia both use for Asab specifically, rather than a generic barrels-to-tonnes multiplier, since crude density varies by field. That tonnage figure matters if you’re comparing Asab against fields reported in metric tonnes rather than barrels, which is the norm outside North America.

Where Asab Is: Abu Dhabi Location and Field Basics

Asab is an onshore field in the western region of the Emirate of Abu Dhabi, part of the United Arab Emirates, operated under ADNOC Onshore. It sits within the cluster of ADNOC’s major onshore assets and is connected into the pipeline network that feeds Abu Dhabi’s export terminals. For readers searching “asab uae” or “asab abu dhabi” looking simply to place the field on a map: it is not offshore, and it is not in Dubai or a neighboring emirate — it is a specifically Abu Dhabi onshore asset, distinct from ADNOC’s offshore fields such as Upper Zakum.

The field is one of several mature onshore assets ADNOC has operated for decades, which is the context for why so much of the current news around Asab is about maintaining and modestly expanding output from an already-developed field, rather than initial discovery-phase exploration.

Asab Oil Field Production: Barrels Per Day, Then and Now

ADNOC’s own site lists Asab’s current crude oil production capacity at 450,000 barrels per day. That is a capacity figure — the field’s designed maximum throughput — not necessarily the volume actually lifted every single day, which fluctuates with OPEC+ quota adjustments, maintenance schedules, and reservoir management decisions.

For actual production volume, the most recent verified figure available is from Global Energy Monitor: Asab produced 1,642.5 million barrels of crude oil across 2020. Averaged over 366 days (2020 was a leap year), that works out to roughly 4.49 million barrels for the year per day-equivalent… more usefully expressed, that annual total divided across the year works out to an average of approximately 1.64 billion barrels annually at 2020 rates — well below the 450,000 b/d capacity figure run at full-year utilization (which would total roughly 164 million barrels annually), a gap that reflects both OPEC+ quota constraints through 2020 and the fact capacity and realized output are two different numbers. No production volume more recent than 2020 has been published in the sources available for this article — see the verification section below for where to find current-year figures.

In June 2022, ADNOC awarded a $173 million contract specifically to boost Murban crude production at Asab, according to The National News, which reported the contract was aimed at a 12% production increase. That single contract is a useful marker of how ADNOC invests incrementally in mature fields like Asab rather than treating them as fixed assets — capacity moves in discrete steps tied to specific, dated capital projects, not as a smooth trend line.

Asab Field Snapshot: Reserves, Capacity, and Output at a Glance

Who Owns Asab: ADNOC, BP, and TotalEnergies Stakes

Asab is operated by ADNOC Onshore under a joint-venture ownership structure. Per Global Energy Monitor’s field profile, the stakes are: ADNOC 60%, BP 10%, and TotalEnergies 10%, with the remaining interest split among other partners including CNPC. This structure is typical of ADNOC’s onshore concessions, which were restructured in 2015 to bring in a consortium of international partners alongside ADNOC’s majority stake — a change from the earlier operating model that predated most of these international partnerships.

Asab Ownership Structure

If you need the precise current breakdown of that remaining roughly 20% — which partners beyond CNPC hold what — that level of detail sits in ADNOC’s own corporate filings and investor disclosures rather than in the public summary sources used here; ADNOC’s site is the correct place to check for the current, complete partner list.

History: Discovery in 1965 to Commercial Production in 1970

Asab was discovered in 1965 and brought into commercial production in 1970, according to ADNOC operator records cited on Wikipedia. That five-year gap between discovery and first commercial output is fairly typical for onshore Gulf fields of that era, reflecting the time needed to appraise the reservoir and build gathering and processing infrastructure before sustained production could begin.

More than five decades into production, Asab is a mature field by any standard definition — most onshore fields see production plateau and then decline within 20-40 years of first output absent active intervention. That maturity is the backdrop for the enhanced-recovery and capacity-boost projects covered in the next section: they exist specifically because a field producing since 1970 needs deliberate intervention to sustain, let alone grow, output.

The SAS Project: 30,000 Extra Barrels a Day

The Shah-Asab-Sahil (SAS) development project is the mechanism behind Asab’s projected capacity increase. Per MEED’s coverage of the SAS oilfield development, the project is designed to add 30,000 barrels per day to Asab’s output, lifting total capacity from the current 450,000 b/d to 480,000 barrels per day once complete.

No confirmed completion date for the SAS project is available in the sources reviewed for this article — MEED’s reporting confirms the capacity target and the project name but not a firm in-service date. If a completion date matters for your purposes (investment timing, supply forecasting, or competitive analysis), the two outlets tracking this in near-real time are MEED and The National News, both of which cover ADNOC capacity expansions and contract awards as they’re announced; ADNOC’s own press releases and investor updates at adnoc.ae are the primary source and typically lead any third-party coverage by days to weeks.

The 2022 Murban boost contract described above ($173 million, targeting a 12% increase) may or may not be the same initiative as SAS — the sources available do not explicitly link the two, so treat them as two separate, dated capacity actions unless ADNOC’s own materials confirm otherwise.

How to Verify These Figures Yourself

Every figure above has a vintage attached because oil-field data ages, and this page will be read well after these numbers were current. Here is the durable method for getting the up-to-date version of each figure, independent of anything published here:

1. Reserves and reservoir data: ADNOC does not publish a continuously updated public reserves ticker for individual fields like Asab. The 3.6 billion barrel figure traces back through Wikipedia to ADNOC source material — for a fresher number, ADNOC’s own corporate and investor communications at adnoc.ae are the primary source; third-party aggregators like Wikipedia and GEM lag behind ADNOC’s own disclosures.
2. Production capacity and volumes: Global Energy Monitor’s Asab page is updated periodically but lags real-time by roughly 1-2 years based on the 2020 figure being the most recent available as of this review — revisit it annually rather than assuming it’s current.
3. Capacity expansion news (SAS project, contract awards): MEED and The National News both cover ADNOC project announcements as they happen; searching either outlet’s site directly for “Asab” will surface anything published after this review.
4. Ownership structure changes: Joint-venture stakes in ADNOC onshore concessions are renegotiated infrequently but do change — GEM’s field page and ADNOC’s own site are the two places a stake change would be reflected.

This four-step check — primary operator disclosure, aggregator cross-check, trade press for anything recent, and a direct site search for project-specific news — works for verifying figures on almost any mature oil field, not just Asab. That’s the reusable part of this page: the numbers above will eventually be outdated, but the method for replacing them won’t be.

Reserves-to-Production Runway Calculator

Using Asab’s own cited reserves and capacity figures as starting defaults, this calculator estimates a simple reserves-to-production runway in years — swap in any reserve or output figure you want to test, including a fresher number you’ve pulled using the method above.

Assumptions: this is a simple reserves-divided-by-output arithmetic model, not a reservoir simulation. It ignores decline curves, new discoveries, enhanced-recovery gains beyond what you enter manually, price-driven shut-ins, and OPEC+ quota constraints — all of which affect a real field's actual production path. Use it to compare scenarios, not to forecast an exact end date for Asab or any other field.

Beyond Oil: Satellite Intelligence for Mineral Exploration

Asab is a hydrocarbon field, but the same remote-sensing principle that lets analysts track infrastructure and land change from orbit applies directly to solid mineral exploration — a field Farmonaut works in directly. Our satellite based mineral detection service applies Earth observation and multispectral/hyperspectral analysis to identify mineral targets without ground disturbance, cutting exploration timelines from months to days in many cases.

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For a deeper look at how this is applied in practice, our satellite-driven 3D mineral prospectivity mapping walkthrough covers the methodology end to end. Mining companies and exploration teams can contact us directly or use our Get Quote form for a project-specific scope.

FAQs: Asab Oil Field Reserves and Production

Conclusion: What's Solid and What Isn't

The solid, sourced figures on Asab are: 3.6 billion barrels of proven reserves (507 million tonnes), 450,000 barrels/day current capacity rising toward 480,000 b/d via the SAS project's 30,000 b/d addition, a 2020 actual production total of 1,642.5 million barrels, a $173 million contract awarded in June 2022 to boost Murban output, ownership split 60/10/10 between ADNOC, BP, and TotalEnergies, and a field history running from discovery in 1965 to commercial production in 1970.

What isn't published anywhere we could verify: current-year production volumes past 2020, a firm SAS completion date, any Asab-specific emissions or water-use data, current Murban pricing, and a depletion or reserve-replacement rate. Rather than fill those gaps with estimates, this page names them and points to where ADNOC, MEED, and The National News would publish them once they exist.

For mineral exploration work rather than hydrocarbons, Farmonaut's satellite-based tools apply the same remote-sensing discipline to mining targets — see satellite based mineral detection and satellite-driven 3D mineral prospectivity mapping, or reach out via contact us or the mining query form for a project-specific scope.