Block 66: New 3D Seismic Insights & Frontier Opportunity

Written by Marcel Chin-A-Lien – Petroleum & Energy Insights Advisor – 18th June 2025.

My musings, best-guesses and speculations. To whom it may interest and serve.

Please note: AI image, highly “ schematic and no relationship with Block 66 “.

Block 66, former, 2023 relinquished Block 53 of Apache?

June 17th, 2025, PSC with Petronas and Paradise Oil (=Staatsolie).

New insights, based on recent seismic campaign and wells.

1. Overview of the 2024 3D Seismic Campaign

In late 2024, Petronas Suriname E&P contracted Shearwater GeoServices aboard the Amazon Warrior to conduct a high‑quality 6,000 km² 3D marine seismic survey.

This extensive acquisition spanned Blocks 52, 63—and, crucially, the newly re‑licensed area of Block 66 (formerly part of Apache’s 2015–2020 Block 53) [oai_citation:0‡shearwatergeo.com](https://www.shearwatergeo.com/press-releases/shearwater-awarded-large-3d-frontier-exploration-survey-in-suriname?utm_source=chatgpt.com).

2. Map of Survey Coverage

The image below illustrates the survey footprint—spanning proven discoveries in Blocks 52/63 and extending into Block 66.

Legend: Blue outline = seismic coverage; adjacent colored blocks = Block 52/63; northern extension = Block 66.

3. Why This Survey Matters for Block 66

• Structural definition: the survey reveals deep fault blocks and closures beyond Apache’s seismic resolution.
• Stratigraphic traps: improved imaging targets deeper Campanian–Maastrichtian turbidites, possibly overlooked before.
• Charge system mapping: helps identify both source kitchens and seal integrity in newly imaged zones.
• Strategic synergy: Petronas uses data over proving grounds (Blocks 52) to underpin exploration in the adjacent frontier.

The project’s timing—commencing Q4 2024 and completing in ~3 months — reflects a disciplined, modern data gathering approach .

4. Strategic & Technical Implications

Category	Implication
Subsurface clarity	Resolves subtle closures missed by Apache’s vintage seismic
Deeper play access	Enables targeting of proven deeper horizons (Albian, Maastrichtian)
Data integration	Combines multi-client and proprietary surveys into unified basin model
Exploration planning	Supports risk-informed targeting for wells in 2026

5. Why Block 66 Could Succeed Where Others Didn’t

Although Apache drilled three dry wells (Kolibri‑1, Popokai‑1, Rasper‑1), those efforts focused on upper Campanian slope–fan plays, and lacked modern seismic clarity. Block 66’s new data opens the door to:

• Deep-tur bidite shoreline/ramp targets.
• Structural traps in fault-bounded half grabens.
• Gas-prone stratigraphic zones recognized in the survey.

This is not a reprise of old exploration—it is a redefinition, rooted in deeper imaging and smarter play concept selection.

6. Outlook: Exploration Strategy & Business Rationale

• Petronas has committed to drilling two wells by 2026 under the June 2025 PSC .
• By leveraging learnings from Block 52’s oil and gas discoveries, PSC strategy is informed and synergistic.
• Staatsolie’s 20% position (via Paradise Oil) ensures national symmetry and fiscal participation.
• Success would unlock not just a new find—but expand Suriname’s frontier with confidence.

7. Conclusion

Block 66 is not simply a relinquished zone—it represents the intelligent evolution of Suriname’s offshore exploration. With new seismic insight, modern play concepts, and strategic alignment, the block’s potential is redefined. The PSC and seismic foundation carefully balance risk and opportunity—making Block 66 a credible and compelling target for frontier explorers.

8. About the Author

Marcel Chin-A-Lien – Petroleum & Energy Advisor
48 years of global, in-depth expertise leading transformative multi‑billion-dollar discoveries—spanning the USSR, North Sea, Gulf of Mexico, bid rounds, PSC design, M&A and upstream value creation. Holder of four postgraduate degrees integrating technical, commercial and strategic disciplines. Fluent in 7 languages; expert across cross-cultural oil & gas, policy, commercial development and contract negotiations. “Exploration & Production integrated with Business & Commercial Development and Critical Insights.”

Credentials:
Drs – Petroleum Geology
Engineering Geologist – Petroleum Geology
Executive MBA – International Business, M&A
MSc – International Management (Petroleum)
Energy Negotiator (AIEN)
Certified Petroleum Geologist #5201 (AAPG)
Chartered European Geologist #92 (EFG)
Cambridge Award “2000 Outstanding Scientists of the 20th Century”
Paris Awards (GDF‑Suez) – Innovative New Business Projects – Two Gold Awards, 2003.

LinkedIn: nl.linkedin.com/pub/marcel-chin-a-lien/9/a73/547
Contact: marcelchinalien@gmail.com