From Mythical El Dorado to the Golden Lane of the Upper Cretaceous
Prologue — From Raleigh’s Dream to Deepwater Reality
Written by: Marcel Chin-A-Lien – Petroleum & Energy Avisor – February 2026
In 1596, Sir Walter Raleigh published “The Discovery of the Large, Rich and Beautiful Empire of Guiana”.
He wrote of El Dorado, a city of gold hidden somewhere inland, beyond rivers and jungle.
For centuries, explorers searched the Amazon basin.
They were looking in the wrong place.
The real El Dorado was not in the forest.
It lay beneath 1,500–2,500 meters of Atlantic water, buried in Upper Cretaceous deep-marine turbidite fans.
What we now call the Golden Lane.
The awakening began in May 2015.
2015 — Liza-1: The First Glimpse
When Liza-1 was drilled in the Stabroek Block by ExxonMobil, the result was more than a discovery.
It was proof of a working petroleum system:
- Source: Upper Cretaceous marine shales linked to Oceanic Anoxic Events (OAE2)
- Reservoir: High-quality deepwater turbidite sands
- Seal: Regionally extensive marine shales
- Trap: Stratigraphic and structural combinations along the slope
Liza-1 did not just find oil.
It validated a basin model.
Exploration Acceleration (2016–2023)
What followed was not random drilling.
It was disciplined step-out testing along a depositional fairway.
Each well added a piece of the geological puzzle.
Key Guyana Wells (Post-2015 Chronological Highlights)
| Year | Well | Operator | Result |
|---|---|---|---|
| 2015 | Liza-1 | ExxonMobil | Major oil discovery |
| 2016–2017 | Liza appraisal series | ExxonMobil | Reservoir extent confirmed |
| 2017 | Payara-1 | ExxonMobil | Significant new discovery |
| 2017 | Snoek-1 | ExxonMobil | Oil discovery |
| 2017 | Turbot-1 | ExxonMobil | Deepwater discovery |
| 2019 | Yellowtail-1 | ExxonMobil | New development hub |
| 2019–2020 | Uaru-1 | ExxonMobil | Multiple pay intervals |
| 2021 | Whiptail-1 | ExxonMobil | Large new reservoir system |
| 2022–2023 | Fangtooth / Bluefin / others | ExxonMobil | Expanded deeper fairway |
By 2025, Guyana had drilled well over 50 exploration and appraisal wells offshore since Liza-1, transforming a frontier margin into a global petroleum province.
Suriname Enters the Stage
Suriname’s deepwater awakening followed shortly after.
While early wells in Block 58 (TotalEnergies & Apache) confirmed oil, Block 52 introduced a new dimension: commercial gas.
Suriname’s Breakthrough — Block 58 – The South-Eastern Golden Lane
Chronological Discoveries — Block 58
| Well | Announced | Operator | Reservoir Interval | Strategic Meaning |
|---|---|---|---|---|
| Maka Central-1 | 7 Jan 2020 | TotalEnergies / Apache (APA) | Upper Cretaceous fan sands | Suriname’s first clear deepwater breakthrough — proof of petroleum system continuity. |
| Sapakara West-1 | 2 Apr 2020 | TotalEnergies / APA | Campanian–Maastrichtian reservoirs | Confirmed repeatability and multi-well development potential. |
| Kwaskwasi-1 | Jul 2020 | TotalEnergies / APA | Stacked oil-bearing intervals incl. Santonian | Demonstrated vertical reservoir stacking — scale begins to emerge. |
| Keskesi East-1 | Jan 2021 | TotalEnergies / APA | Oil-bearing fan system (eastern extent) | Extended the fairway eastward — reduced lateral risk. |
| Krabdagu-1 | 21 Feb 2022 | TotalEnergies / APA | ~90m net oil pay (Maastrichtian & Campanian) | Material net pay thickness; cornerstone for future development (Gran Morgu). |
Not Every Well Is a Headline
A super basin is not a fairytale. Some wells test the limits:
- Bonboni-1 — sub-commercial outcome; fluid quality and deliverability matter.
- Dikkop-1 — reminder of sand distribution and trap variability risks.
These wells did not weaken the basin story — they refined it. Every non-commercial result sharpened the geological model.
From Discoveries to Development — Gran Morgu
The Block 58 cluster culminated in the Gran Morgu development concept, combining Sapakara and Krabdagu into Suriname’s first major offshore oil project.
- FPSO capacity: ~200,000 bbl/day
- ~30+ development wells planned
- Targeted first oil: late 2020s
Block 58 proved one decisive point: The Golden Lane does not respect political boundaries. It is a basin-scale geological phenomenon.
If Liza-1 was the spark, Block 58 was the confirmation. The southern fairway is real.
Block 52 — Emerging Gas Province
| Well | Operator | Year | Result |
|---|---|---|---|
| Sloanea-1 | PETRONAS | 2020 | Gas discovery (commercial) |
| Roystonea-1 | PETRONAS | 2023 | Oil & gas discovery |
| Fusaea-1 | PETRONAS | 2024 | Additional hydrocarbon bearing zones |
| Caiman-1 | PETRONAS | 2025 | Exploration well, encouraging results |
Suriname is now transitioning from exploration confirmation to development planning, with Sloanea positioned as a potential standalone gas project.
Production Wells & Projects
Guyana — Producing Fields
- Liza Phase 1 (FPSO Liza Destiny)
- Liza Phase 2 (FPSO Liza Unity)
- Payara (FPSO Prosperity)
- Yellowtail (under phased development)
Hundreds of development wells are planned across successive FPSO projects, with production exceeding 600,000 barrels per day and targeting over 1 million bpd later this decade.
Suriname — In Pipeline
- Gran Morgu (Block 58 oil project)
- Sloanea Gas (Block 52)
The Geological Striptease
The basin revealed itself layer by layer.
First Liza.
Then Payara.
Then Yellowtail.
Then Whiptail.
Then Fangtooth.
Then Suriname’s Maka,
Sapakara, and
Sloanea.
Each well was not a surprise.
It was confirmation of depositional continuity: Upper Cretaceous deep-marine fans sourced by anoxic marine shales, charged and trapped along slope channels and structural highs.
This is not a one-field story.
It is a petroleum system story.
Super Basin Metrics
- Exploration wells (Guyana post-2015): 50+
- Exploration wells (Suriname deepwater): 20+
- Producing FPSOs (Guyana): Multiple active
- Projects in development (Guyana + Suriname): 5+ major hubs
- Combined discovered resources: Multi-billion barrel oil equivalent scale
Behind the Scenes
Geologists adjusted basin models in real time. Reservoir engineers recalculated connectivity. Governments drafted petroleum laws. Drillships rotated continuously. Supply chains expanded from Houston to Paramaribo.
This was not luck. It was convergence:
- Geological insight
- Capital discipline
- Operational execution
- Stable fiscal frameworks
Conclusion — The New El Dorado
Sir Walter Raleigh imagined gold in the jungle. The modern Golden Lane lies offshore — stratified, mapped, drilled, and flowing.
The Guyana–Suriname Basin is no longer a frontier. It is a super basin in ascent.
And the story is still being written.
Prepared for publication — Guyana–Suriname Awakening Series
Exploration | Development | Petroleum System Evolution
