Producer · Senior · Upstream · Oil-weighted · Oil · Brazil · China · South America
Last updated 21 June 2026
Data compiled from public filings — information only, not investment advice. AI‑assisted; see methodology.
Portfolio Aggregate · 1 project
Portfolio mode — asset rows are for context only; tab totals use the company aggregation.
CNOOC — Upstream Portfolio
Portfolio
Project information
As at 31 December 2025
Description
As at 31 December 2025
CNOOC Limited's consolidated upstream portfolio, China's largest offshore oil and gas producer, spanning offshore China (Bohai, South China Sea, East China Sea) and international assets in Canada, the UK, Brazil, Guyana, and Colombia. 2025 saw 16 new projects come on stream. All-in cost was US$27.90 per BOE; realized oil price US$66.47/bbl and realized gas price US$7.95/mcf.
Portfolio Aggregate
Multiple effective dates · 1P
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Reserves & resources — detail
As at 31 December 2025
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Operating · 9 projects
Bozhong 26-6 Oilfield Development Project
Asset · Operating
Project information
As at 31 December 2025
Description
As at 31 December 2025
Offshore oilfield development in the Bohai region. Phase I came on stream in 2025 as one of 16 new projects, with Phase II development also progressing during the year.
Oil & Gas metrics
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Buzios Oilfield
Asset · Operating
Project information
As at 31 December 2025
Description
As at 31 December 2025
Pre-salt deepwater oilfield in the Santos Basin offshore Brazil in which CNOOC holds a working interest. The Buzios 7 Project was put into production in 2025, with 11 Buzios units expected onstream over time.
Oil & Gas metrics
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Kenli 10-2 Oilfield Group Development Project
Asset · Operating
Project information
As at 31 December 2025
Description
As at 31 December 2025
Offshore oilfield group development in the Bohai region. Phase I came on stream in 2025 as one of 16 new projects during the year.
Oil & Gas metrics
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Long Lake Project
Asset · Operating
Project information
As at 31 December 2025
Description
As at 31 December 2025
Oil-sands project in Alberta, Canada, in which CNOOC holds working interests. Production continued to increase in 2025, supported by the rapid ramp-up of the Long Lake Northwest project.
Oil & Gas metrics
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Lufeng 13-8 Oilfield
Asset
Project information
Description
Offshore oilfield in the South China Sea successfully brought into production, part of CNOOC's eastern South China Sea operations.
Oil & Gas metrics
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Mero Oilfield
Asset · Operating
Project information
As at 31 December 2025
Description
As at 31 December 2025
Pre-salt deepwater oilfield in the Santos Basin offshore Brazil in which CNOOC holds a working interest. The Mero-4 Project was put into production in 2025.
Oil & Gas metrics
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CNOOC — China (Offshore)
District
Project information
As at 31 December 2025
Description
As at 31 December 2025
CNOOC's offshore China operations across the Bohai, South China Sea (eastern and western), and East China Sea. China accounted for approximately 64.5% of net proved reserves and 69.1% of net production in 2025.
Oil & Gas metrics
As at 31 December 2025 · 1P
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Reserves & resources — detail
As at 31 December 2025
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Stabroek Block
District · Operating
Project information
As at 31 December 2025
Description
As at 31 December 2025
Deepwater block offshore Guyana, one of the world's most important recent oil provinces, in which CNOOC holds a working interest. The Yellowtail Project commenced production in 2025, and CNOOC acquired four new exploration acreage positions during the year.
Oil & Gas metrics
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CNOOC — Overseas
Segment
Project information
As at 31 December 2025
Description
As at 31 December 2025
CNOOC's international operations across Canada, the United Kingdom, Brazil, Guyana, and Colombia, including the Mero and Buzios pre-salt fields in Brazil, the Stabroek block in Guyana, and the Long Lake oil-sands project in Canada.
Oil & Gas metrics
As at 31 December 2025 · 1P
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Reserves & resources — detail
As at 31 December 2025
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Assumptions
- The projects listed here reflect the information captured in this workspace and are not necessarily a complete picture of the company's portfolio. For authoritative figures, refer to the company's official filings.
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How to read this tab
- The tables below list unit codes most often used in the Oil & Gas sector for this company. MetalPilot stores contained metal or product in the codes below; grade and tonnage use separate fields. In side-by-side comparison views (stock page Portfolio tab, watchlist By sector), heterogeneous source units are converted to each commodity's preferred display unit (for example Moz Au, kt Cu, MMbbl oil) before summing; the same canonical codes appear in project data.
What the Portfolio tab shows
- The Portfolio tab presents a project-level view of the company's reported assets, built from publicly disclosed information (technical reports, annual filings, MD&A, investor presentations, MRMR / R&R statements, NI 43-101 / NI 51-101 / SEC S-K 1300 / SEC S-K 1200 / JORC / SAMREC / PERC / PRMS / COGEH filings, and similar primary sources).
- Figures are grouped by project type (mining, oil & gas, royalty, stream, processing facility, development, portfolio aggregate) and are shown alongside the headline reserve base, headline production, headline grade / quality, cost benchmarks, estimated lifetime, commercial terms (for royalties / streams), operational capacity (for processing) and a single-figure rating where the underlying data supports one.
- Each data table on the Portfolio tab is followed by ONE Assumptions footnote describing the modelling choices for that table; KPI stat-card assumptions appear in the bottom block instead. All legal and section disclaimers are merged into a single disclaimer list at the bottom of the Portfolio tab.
Concepts in your sector — Oil & gas
- 1P/2P/3P — cumulative uncertainty. 1P = Proved (≥90%); 2P = Proved+Probable (≥50%, primary non-SEC metric); 3P adds Possible (≥10%). SEC filers often publish 1P only.
- Contingent (1C/2C/3C) = discovered, sub-commercial. Prospective (1U/2U/3U) = undiscovered. Neither feeds economic models without further work.
- Developed vs Undeveloped: PDP (producing), PDNP (developed non-producing), PUD (undeveloped). Reserves walk PUD→PDP is reclassification, not new discovery.
- BOE uses 6 Mcf gas : 1 bbl oil (thermal, not economic). Some issuers use 5.8:1 — read footnotes.
- Pricing case: Forecast vs Constant (NI 51-101/PRMS) or SEC 12-month average. Do not add cases together.
Portfolio tab — table guide
- Portfolio KPIs — company-level headline numbers aggregated from the featured projects (project counts, attributable annual production by commodity, attributable resource base by commodity, last filing date, operator share). USD value lines multiply attributable volumes by the resolved snapshot price.
- Portfolio snapshot — one-screen summary of the portfolio: counts by type and status, country mix, reporting standards used, operator share, primary commodity, attributable annual production summary and attributable resource base summary.
- Oil & Gas — one row per O&G project (typically a field, licence, play or basin asset), with columns for location, status, primary hydrocarbons, production (with rating), reserves & resources (with rating), costs and estimated lifetime.
- Royalty — one row per royalty interest held by the company. Columns cover the underlying project, operator, commodity, commercial terms (rate, type, cap, area-of-interest), attributable production, attributable reserves and estimated lifetime.
- Stream — one row per metal stream held by the company. Each row shows the underlying project, the streamed commodity, the headline stream percentage, the ongoing per-ounce / per-tonne payment, and attributable production / reserves.
- Processing facilities — one row per midstream / processing facility (pipeline, fractionator, LNG train, storage cavern, refinery, smelter, mill, heap-leach pad, CPP, etc.). Columns include nameplate capacity, contracted capacity, feedstock commodities and operational footprint.
- Development — projects in development status or in a pre-production lifecycle phase. The production column is re-labelled 'Targeted production (rating)' to highlight that the figures are plans, not actuals.
- Portfolio Aggregate — a single company-level row used when the company itself publishes a portfolio rollup (e.g. company-wide 2P barrels across all properties).
- Reserves & resources — detail — a leaf-category pivot showing every reserve and resource category disclosed across the projects.
- Reserves walk — gross (disclosed) — year-by-year reconciliation of the opening balance to the closing balance, broken into Extensions & discoveries, Revisions, Improved recovery, Purchases, Divestitures, Production and Conversion to developed.
- Reserves walk — net change by year — per-year summary of net additions and net deductions across the portfolio.
- NPV (grouped) — all NPV rows captured from the filings, grouped by commodity, resource category, development status and pricing case. Each NPV figure is shown with its discount rate, basis (before-tax / after-tax), currency and value scale.
Ownership / Working interest
- Ownership percentage means the company's working-interest share of the asset: its slice of the project before royalties and before government take. It is shown on a 0–100 scale.
- Mines, oil and gas fields, and processing facilities — this is how much of the asset belongs to the company under that working-interest idea. One hundred percent is fully owned; a lower number usually means partners share the rest.
- Royalties and streaming agreements — the percentage is often not the story; what matters economically is usually the royalty or stream rate, shown elsewhere alongside these figures.
- Oil and gas — read this as gross working interest only. Do not treat it as net production or net wells after royalties; when filings distinguish gross from net, that shows up in how the resource numbers themselves are labelled.
- Below 100% — the short summary for each project names other owners and their stakes when the source says who they are.
- NRI vs WI (O&G). Working interest (WI) is the obligation to pay a share of costs; net revenue interest (NRI) is the share of revenue after royalties and overriding-royalty interests. A 100% WI well rarely produces 100% NRI; typical onshore U.S. NRI is 75–87.5% of WI depending on the lease royalty.
- Operator vs non-operator. The operator runs day-to-day operations; non-operating partners pay their WI share of costs but do not run the asset. Some Portfolio rows show operator share where disclosed.
Hydrocarbon commodity — notes
- The Commodity column shows normalized labels; values are stored as snake_case CommodityCode strings in pkg/domain and project resource rows (for example shale_gas, oil_equivalent).
- Benchmarks and typical relationship cells are informal market context for reading disclosures — they are not MetalPilot price inputs.
Crude grade primer
- API gravity — lower = heavier. Light crude is ≥ 31.1° API (≤ 870 kg/m³); heavy is 22.3–31.1° API; extra-heavy is < 22.3°. Bitumen is ≤ 10° API.
- Sulphur — sweet vs sour. Sweet crude has ≤ 0.5% sulphur; sour > 0.5%. Refineries price the discount on sour crude into the differential.
- WTI vs Brent vs WCS. WTI (West Texas Intermediate, Cushing OK) is the U.S. light-sweet benchmark; Brent (North Sea) is the global light-sweet benchmark; WCS (Western Canadian Select) is the heavy/sour benchmark for Canadian production.
Unit codes, conversion cheat sheets, cost benchmarks (AISC, C1–C3), reporting standards (NI 43-101, JORC, SEC S-K 1300) and resource/reserve category definitions live in the full terminology & units reference.
Each table lists the numeric band for scores 1–5 (production and resource base; grade where applicable for mining commodities) using the same thresholds as project rating stat cards. Only commodities that appear on featured projects for this document are listed.
Oil equivalent (BOE)
Oil
Natural gas
Copper uses kt Cu bands (Mlb Cu when lb-scale copper resources appear on featured projects). Lithium grade uses hard-rock % Li₂O bands unless brine-style extraction or brine units appear on featured projects.
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