GLIAG

GOLDEN LANE INVESTMENTS ADVISORY GROUP

STRATEGIC PETROLEUM INTELLIGENCE ESSAY

FROM GRAVITY TO CHARGE

Defining the Bonaire Basin Basement, Petroleum Kitchens and Hydrocarbon Migration System

Using Free-Air and Bouguer Gravity, Seismic Calibration, the Falcón Basin and the Perla Gas Field

Figure 1A. Companion GLIAGoGRAPH — Bonaire Basin petroleum kitchens, migration pathways and tectonic triggering.

By Drs. Marcel P. T. Chin-A-Lien, MBA, M.Sc., Ing. Geologist

Certified Professional Geologist Nr. 5201-1996 (AAPG) · Chartered European Geologist Nr. 92-1996 (EFG) · Energy Negotiator, June 2021 (AIEN)

Principal Founding Partner & Chief Architect, GLIAG N.V.

Publication ID: GLIAG-FBABC-2026-002  ·  31 July 2026  ·  The Netherlands

GLIAG · STRATEGIC PETROLEUM INTELLIGENCE​From Gravity to Charge · GLIAG-FBABC-2026-002

Disclaimer, Intellectual Property & Author’s Note

Disclaimer

This publication has been prepared exclusively for educational, scientific, strategic and policy-discussion purposes. It reflects the independent professional judgment, geological interpretation and strategic opinions of the author at the time of writing.

Although every reasonable effort has been made to verify the accuracy, completeness and reliability of the information presented, no representation or warranty—express or implied—is made regarding its completeness, correctness or future applicability. Geological interpretations, petroleum-system models, gravity inversions, basin reconstructions and exploration concepts are inherently subject to uncertainty and may evolve as new data become available.

Nothing contained in this publication constitutes investment advice, legal advice, engineering certification or a recommendation to undertake any specific commercial or governmental action. Any decisions based upon this publication remain entirely the responsibility of the reader, investor, company or governmental authority concerned.

Copyright, Intellectual Property & Proprietary Work

© Marcel P.T. Chin-A-Lien. All Rights Reserved.

This publication represents an original intellectual work created by Marcel P.T. Chin-A-Lien and published under the GLIAG Strategic Petroleum Intelligence Platform.

The originality of this work resides not in ownership of public geological facts or publicly available datasets, but in the author’s original:

• geological interpretations;
• integrated gravity and petroleum-system methodologies;
• basin reconstruction concepts;
• exploration models;
• strategic intelligence frameworks;
• original figures, maps and illustrations;
• analytical text;
• conceptual architecture;
• GLIAG doctrines;
• synthesis of multidisciplinary information; and
• overall intellectual presentation.

These original elements constitute proprietary intellectual property of the author and GLIAG and are protected under applicable international copyright, intellectual-property and related laws.

No part of this publication may be reproduced, translated, distributed, adapted, commercially exploited, incorporated into artificial intelligence training datasets, or republished in any form without prior written permission from the copyright holder, except for brief quotations used with proper academic attribution.

The names GLIAG, GLIAG Strategic Petroleum Intelligence Platform, GLIAG Intelligence Brief, GLIAGoGRAPH, Guyana Basin Watch (GBW) and related GLIAG concepts, methodologies and branding elements are proprietary identifiers of GLIAG.

Author’s Reflection

This publication carries a deeply personal meaning.

It is dedicated to the celebration of my own fiftieth year of continuous involvement in the fascinating, ever-evolving and endlessly inspiring world of petroleum geology and the broader global energy landscape.

It also marks another personal milestone: my contribution as Curaçao’s first petroleum geologist—a professional journey that began nearly five centuries after Alonso de Ojeda first recorded the island in 1499.

During these five decades I have witnessed discoveries that transformed nations, technologies that redefined exploration, and ideas that repeatedly proved capable of changing economic history. Yet one lesson has remained constant:

Natural resources create opportunities. Vision, knowledge and institutions determine whether those opportunities become prosperity.

This essay has therefore been written with genuine respect for the governments, institutions, universities and citizens of Curaçao, Aruba, Bonaire and the wider Caribbean.

Its purpose is neither criticism nor advocacy for any single project. Rather, it is an invitation to reconsider geological evidence through an integrated lens and to stimulate informed discussion about future possibilities.

If the geological potential ultimately proves limited, rigorous exploration will provide that answer.

If meaningful petroleum systems do exist, only disciplined scientific investigation and responsible exploration can reveal them.

In either case, knowledge advances.

A Personal Appeal

Gravity is silent.

It neither argues nor persuades.

It simply records the deep architecture of the Earth, patiently waiting for someone willing to listen.

The subsurface has carried its story for millions of years.

Whether that story is ever fully understood now depends not upon geology alone, but upon human curiosity, institutional courage and thoughtful leadership.

My sincere hope is that this work encourages policymakers, regulators, academic institutions and industry leaders to embrace their shared responsibility with wisdom, diligence and an open scientific mind.

The future need not be decided by assumption.

It can be guided by evidence.

The choice ultimately belongs to today’s generation of decision-makers.

Will these basins be explored with curiosity, discipline and scientific rigor?

Or will their geological potential continue to sleep—like Sleeping Beauty (Doornroosje)—waiting for a future generation to awaken what this generation chose not to investigate?

History has shown that exploration rarely rewards certainty.

It rewards those willing to ask the next question.

If this publication inspires even one such question, its purpose will have been fulfilled.

Marcel P.T. Chin-A-Lien
Principal Founding Partner & Chief Architect
GLIAG Strategic Petroleum Intelligence Platform

“Where Information Becomes Intelligence.”

Executive Perspective

The Bonaire Basin is one of the most consequential under-evaluated petroleum-system questions along the southern Caribbean plate boundary. Its importance does not arise merely from the possibility that sediment thickness may locally approach ten to twelve kilometres. A deep basin becomes strategically meaningful only when its geometry can be connected to effective source rocks, a credible burial and thermal history, hydrocarbon generation and expulsion, migration pathways, timely reservoirs and seals, and preservation through later deformation.

The controlling analytical sequence is therefore not ‘deep gravity low equals petroleum kitchen.’ The sequence is: observed free-air and Bouguer gravity, corrected for bathymetry and crustal structure; seismic definition of acoustic and crystalline basement; construction of an uncertainty-bounded sediment-thickness model; restoration of extension, subsidence, inversion and erosion; modelling of candidate source rocks; and finally simulation of maturation, generation, expulsion, migration, accumulation and leakage.

This essay presents the first GLIAG provisional spatial model of that sequence. The four modelling maps and the companion GLIAGoGRAPH are not exploration-grade interpretations. They are disciplined hypothesis maps designed to show what must be tested, where the competing depth scenarios matter most, and how the Falcón Basin and the giant Perla gas field can be used as neighbouring calibration systems rather than simplistic analogues.

Integrated Comparison with the Companion GLIAGoGRAPH

The companion GLIAGoGRAPH supplied by the author is integrated here as a high-level synthesis plate. It combines the Falcón–Bonaire–ABC basin concept with six proposed kitchen domains, structural migration pathways, a tectonic-evolution sequence and an earthquake-triggering hypothesis. It is strategically richer than the four provisional model maps, but it also contains a higher proportion of interpretive content. Accordingly, it should be read as a hypothesis architecture and exploration-screening framework rather than as a calibrated subsurface map.

The comparison below separates the elements that directly reinforce the Atlas workflow from those that require additional evidence before they can be used as quantitative model inputs.

Element	Current essay/model maps	Companion GLIAGoGRAPH	Integrated treatment
Basement and basin geometry	Four scenario maps test 5–7 km, 7–10 km and local 10–12 km fill.	Cross-section depicts a deep, faulted basin with multiple basement highs.	Strong conceptual alignment; replace drawn geometry with gravity–seismic inversion.
Kitchen architecture	Depth- and maturity-driven kitchens are represented as broad probabilistic domains.	Six named kitchens K1–K6 are differentiated by age, location and confidence.	K1–K6 should become testable kitchen polygons with explicit source-rock and maturity criteria.
Falcón calibration	Falcón calibrates burial, source maturity, inversion, erosion and remigration.	Northern Falcón and La Vela–Paraguána systems are shown as separate kitchen analogues.	Consistent; the GLIAGoGRAPH usefully adds spatial differentiation within the Falcón proxy.
Perla calibration	Perla is used as a neighbouring gas-charge and carbonate-trap analogue.	Perla appears in the exploration implications and La Vela–Paraguána system context.	Consistent, but the Perla source, migration distance and charge timing must be calibrated independently.
Migration pathways	Arrows are generic updip vectors derived from conceptual basin gradients.	Primary and secondary pathways follow faults, unconformities and structural highs.	GLIAGoGRAPH is geologically more realistic; pathways must be tied to mapped faults and carrier beds.
Tectonic evolution	The essay restores extension, subsidence, inversion and erosion in basin models.	A seven-stage Late Cretaceous–Recent evolution panel is shown.	Directly integrable as the chronological framework for 2-D/3-D burial and migration modelling.
Earthquake triggering	Not part of the original four-map model.	A Mene Grande earthquake and post-earthquake oil emergence are proposed as evidence of permeability reactivation.	Retain as a separate dynamic-seepage hypothesis; do not use as proof of a direct reservoir connection without geochemical and structural validation.
Confidence and evidence	All four maps are explicitly labelled provisional and non-exploration-grade.	Kitchen confidence levels are stated, but some locations and boundaries appear more definite visually.	Apply the Atlas support-level and uncertainty protocol to every K-domain and migration line.

Integrated modelling consequence. The K1–K6 architecture will be retained as a working hypothesis set. Each kitchen will be tested against the same minimum evidence chain: gravity-constrained basement depth, seismic stratigraphic position, source-rock presence and quality, burial and heat-flow history, transformation ratio, expulsion timing, migration connectivity and trap preservation.

Branding and chronology note. The supplied graphic is preserved as an author-provided companion plate. Its September 2025 internal event chronology and its 31 July 2026 issue date refer to different functions: the former to the depicted earthquake case study and the latter to the GLIAGoGRAPH publication date. The integrated essay therefore treats the earthquake panel as a dated case study rather than as the temporal basis of the regional basin model.

The GLIAGoGRAPH supplies hypotheses to test; the gravity–seismic–petroleum-system workflow determines which hypotheses survive.

1. The Geophysical Problem: Converting Gravity into Basement Depth

Marine free-air gravity records mass variations beneath the seafloor while retaining the effects of bathymetry and crustal structure. Complete Bouguer gravity seeks to remove the predictable mass effects of water depth, seafloor relief and topography so that deeper density contrasts become more visible. Neither field, however, produces a unique basement surface. The same anomaly can be reproduced by different combinations of sediment thickness, sediment compaction, volcanic or continental basement density, intrusions, crustal thinning and Moho relief.

This non-uniqueness is especially severe in the Bonaire Basin because it lies beside dense Great Arc of the Caribbean basement, the exposed ABC island arc, partially inverted sedimentary compartments and a tectonically complex South American margin. A uniform basement density would therefore create false depth variations. The model must allow laterally variable basement properties and must hold crustal thickness within independent seismic constraints.

Controlled-source seismic work along approximately 67°W provides a crucial constraint: the crystalline basement deepens strongly across the Bonaire Basin and the crust is about 25 km thick along that profile, with local sedimentary and low-velocity sections extending to substantial depth. This confirms that a deep sedimentary basin exists, but also shows that basement and Moho geometry vary spatially and cannot be represented by one basin-wide number.

Figure 2. Provisional basement-depth and sediment-thickness hypothesis for the Bonaire Basin and adjoining Falcón–ABC region.

2. Three Competing Depth Scenarios

The model retains three competing sediment-thickness hypotheses. The conservative case places much of the basin at 5–7 km, with the largest gravity contribution partly assigned to basement composition and crustal structure. The intermediate case assigns 7–10 km to the main preserved depocentres. The deep case permits local axial or fault-bounded compartments approaching 10–12 km, but only where seismic depth, realistic density contrasts, magnetic basement and Moho geometry jointly support that interpretation.

Scenario	Sediment thickness	Petroleum implication	Principal rejection test
Conservative	5–7 km	Local oil kitchens; gas only with higher heat flow	Gravity fit requires unrealistic crustal contrasts
Intermediate	7–10 km	Material oil/wet-gas kitchens; local dry gas	Conflicts with seismic or crustal constraints
Deep local	10–12 km	Gas-prone kitchens; overmaturity possible	Implausible accommodation, density or thermal history

3. From Sediment Thickness to Petroleum Kitchens

A depocentre becomes a petroleum kitchen only where burial intersects a source interval of adequate thickness, organic richness and kerogen quality for sufficient geological time. Consequently, the basement map is the lower geometric boundary of the petroleum-system model, not the final exploration answer.

The provisional maturity map translates the depth hypotheses into a conceptual vitrinite-reflectance framework. It illustrates a likely first-order pattern: immature to early-mature margins, oil-window conditions across intermediate burial domains, and wet-gas to dry-gas maturity in the deepest axial compartments. Actual maturity may differ sharply because source age, heat flow, erosion, magmatism and kinetic behaviour remain uncalibrated.

Figure 3. Provisional source-rock maturity and kitchen domains derived from burial-depth hypotheses.

4. Falcón Basin: Burial, Generation and Inversion Calibration

The Falcón Basin is the principal calibration system for reconstructing the burial–maturity–inversion relationship. Published geological and geochemical work demonstrates that the basin contains thermogenic oil and gas systems, with important source rocks in Paleogene and Miocene successions. The basin experienced extension and subsidence followed by strong inversion, uplift and erosion. Present-day sediment thickness therefore understates maximum burial in several sectors.

A credible Bonaire model must first reproduce known Falcón maturity indicators, oil and gas occurrence and the timing of generation relative to structural development. The transferable elements are source-rock kinetic families, compaction trends, tectonostratigraphic ages, inversion timing and plausible erosion ranges. Exact source thickness, total organic carbon and heat flow cannot simply be copied offshore.

The importance of inversion is strategic. It may terminate generation in uplifted sectors, preserve palaeomaturity, reactivate faults as migration conduits, breach older accumulations or enable late gas to recharge already formed traps. The offshore Bonaire Basin is interpreted as partially inverted rather than as completely inverted as the onshore Falcón Basin, raising the possibility that deeper kitchens survived beneath structurally modified margins.

5. Perla: A Calibrated Neighbouring Gas-System Example

Perla provides the closest calibrated example of a giant gas accumulation in the wider Falcón–La Vela–Gulf of Venezuela province. Published accounts describe an accumulation of roughly 17 Tcf hosted in carbonate reservoirs associated with structural and stratigraphic trapping. Regional work also shows that carbonate banks developed over extensional fault footwalls and basement-related highs, some of which became giant gas reservoirs.

The value of Perla as a proxy is not that the Bonaire Basin must contain an identical field. Its value is that it demonstrates the full petroleum-system chain in a neighbouring province: a mature thermogenic gas source, effective migration, carbonate reservoir development, structural or palaeogeographic focusing, seal integrity and long-term preservation.

The Bonaire model should therefore test whether deep axial kitchens could have expelled gas updip toward carbonate or clastic reservoirs on ABC-facing basement highs, toward La Vela-type margins, or into inversion-related structures. It must also test the opposite possibility: that generation predated trap formation, migration bypassed the available structures, or late fault reactivation destroyed preservation.

6. Generation and Expulsion Domains

The provisional generation map differentiates oil-dominant, wet-gas-dominant and dry-gas-dominant domains and overlays conceptual transformation-ratio contours. The central message is vertical and lateral maturity stacking. At intermediate depth, younger source intervals may remain oil prone while older or deeper intervals generate wet gas. In the deepest compartments, older source rocks may become overmature while younger intervals continue to generate gas or condensate.

Generation is not equivalent to expulsion. A petroleum-system model must calculate retained versus expelled hydrocarbons, expulsion efficiency, phase behaviour and timing. Deep burial may increase generated volume but can also lead to secondary cracking, excessive pressure, source depletion and destruction of liquid petroleum potential.

Figure 4. Provisional hydrocarbon generation and expulsion domains, showing conceptual transformation-ratio envelopes.

7. Migration, Charge Focus and Preservation

The provisional migration map illustrates updip movement from deep kitchens toward basin margins, structural highs and island-arc margins. These arrows do not yet represent mapped faults or carrier beds. Their purpose is to define the questions that seismic interpretation and petroleum-system simulation must answer.

Migration should be reconstructed through geological time rather than inferred from the present-day depth surface. The model must identify active faults during each expulsion phase, permeable carrier units, palaeostructural highs, carbonate-bank positions, regional unconformities and changes caused by inversion. A route that is updip today may not have been updip when hydrocarbons were expelled.

Four principal charge directions require testing: northward toward the ABC basement and carbonate margins; southward toward Venezuelan structures; eastward toward La Vela-type reservoir systems; and westward toward Aruba, Paraguána and the Gulf of Venezuela. Charge volume, migration loss and seal integrity must be calculated for each route.

Figure 5. Provisional migration, charge-focus and accumulation fairways from deep kitchen areas toward structural and carbonate highs.

8. The Required Modelling Programme

• Gravity reconstruction: recover and level shipborne and terrestrial free-air gravity; reconstruct complete Bouguer gravity with consistent water, terrain and bathymetric corrections.

• Crustal separation: constrain Moho and crustal domains with wide-angle seismic, refraction, receiver functions and magnetic interpretation.

• Seismic basement model: depth-convert acoustic and crystalline basement using uncertainty-bounded velocity models.

• Joint inversion: run 2-D and 3-D gravity–magnetic–seismic inversions for the conservative, intermediate and deep scenarios.

• Tectonostratigraphic restoration: restore rifting, subsidence, inversion and erosion to reconstruct maximum burial.

• Falcón calibration: calibrate heat flow, kinetics, erosion and maturation against known source rocks and petroleum occurrence.

• Perla calibration: calibrate gas generation, migration distance, carbonate trapping, charge timing and preservation.

• Bonaire simulation: model candidate Cretaceous, Paleogene and Oligocene–Miocene source intervals in 1-D, 2-D and 3-D.

• Migration and charge: simulate expulsion, fault and carrier-bed migration, accumulation, leakage and phase change through time.

• Uncertainty ranking: produce probabilistic kitchen, charge and preservation maps rather than a single deterministic outcome.

9. Strategic Interpretation

The central exploration proposition is not that the entire Bonaire Basin is twelve kilometres deep. The more defensible proposition is that the basin may contain a mosaic of shallow margins, intermediate depocentres and one or more deep axial or transtensional kitchens. Those kitchens could have produced different petroleum phases at different times, while basement highs, carbonate banks and inversion structures focused migration and trapping.

The Falcón Basin shows that the regional system generated thermogenic oil and gas and that inversion profoundly modified burial and preservation. Perla shows that giant gas can be generated, migrated, trapped and preserved in a neighbouring carbonate and basement-influenced setting. Together they justify serious evaluation of Bonaire—but they do not remove its source, reservoir, seal and timing risks.

The exploration value of the Atlas will come from converting a regional gravity indication into a fully timed petroleum-system model. Only then can the basin be divided into true kitchens, migration fairways, charge-accessible traps and low-probability areas.

A deep basin is not a discovery. A mature kitchen is not an accumulation. Value exists only where generation, migration, trap formation, seal and preservation converge in time and space.

10. Provisional Conclusion

The present hypothesis set supports continued testing of all three depth scenarios. The most geologically plausible eventual model may place 5–7 km of fill along margins and inverted sectors, 7–10 km in principal preserved depocentres, and locally 10–12 km in deep fault-bounded or axial compartments. The latter should be accepted only where it materially improves the gravity fit without violating seismic, density, crustal and tectonic constraints.

The next decisive product is therefore a calibrated three-dimensional basement and sediment-thickness model linked directly to Falcón and Perla calibration cases. That model will determine whether the provisional kitchens shown here survive rigorous testing—and whether they generated hydrocarbons at the right time, in the right phase and along migration routes capable of charging preserved traps.

Selected Sources and References

• Magnani et al. — Crustal Structure of the South American–Caribbean Plate Boundary at 67°W — controlled-source seismic constraints on Bonaire Basin crystalline basement, sediments, Moho and crustal thickness.

• Sánchez-Rojas — New Bouguer Gravity Maps of Venezuela — national free-air/Bouguer gravity compilation and spectral/crustal analysis.

• Gorney et al. — Chronology of Cenozoic Tectonic Events — offshore seismic and onshore geology defining Bonaire–Falcón extension and inversion.

• Ramos et al. — Late Cretaceous–Recent Tectonostratigraphic Evolution — gravity, seismic and structural evidence for partial Bonaire inversion and stronger Falcón inversion.

• Subsurface Geology of La Vela Basin, Offshore Venezuela — integrated basement, carbonate reservoir and hydrocarbon framework including the giant Perla gas field.

• Perla Field: The Largest Discovery Ever in Latin America — field-focused account of the Perla discovery and petroleum-system context.

• A New Geologic Model Related to Source Rocks in the Falcón Basin — Falcón source-rock distribution and thermogenic oil/gas generation framework.

• Petroleum Source Rock Analysis in the Eastern Caribbean Basins — regional source-rock and petroleum evidence, including Falcón and Perla context.

• Basement Architecture of the Southern Caribbean Basin — regional gravity–magnetic definition of basement domains and basin architecture.

• Late Cretaceous–Pliocene Paleogeography of the Southern Caribbean — paleogeographic reconstruction and carbonate-bank development over extensional footwalls, including Perla-type settings.

• GLIAG — Curaçao–Bonaire Basin: A Geological Treasure for Oil Exploration — GLIAG petroleum-system risk framework and proposed geophysical evaluation.

• GLIAG — Curaçao–Aruba Seismic Design: A Petroleum Exploration Guide — GLIAG regional seismic acquisition concept for the ABC–Bonaire domain.

Strict Technical, Non-Reliance and Intellectual Property Notice

© 2026 Drs. Marcel P. T. Chin-A-Lien / GLIAG N.V. All rights reserved worldwide. This essay, its analytical structure, scenario architecture, integrated interpretation and provisional maps are protected intellectual property. The maps are conceptual hypothesis models prepared to guide research and data acquisition. They are not derived from a complete exploration-grade gravity, seismic, well or proprietary field database and must not be used as reserves estimates, drilling recommendations, investment advice or proof of hydrocarbon occurrence. Geological and commercial conclusions require independent verification using licensed data, qualified technical review and jurisdiction-specific legal and regulatory due diligence.

About GLIAG

GLIAG N.V. is a boutique Strategic Petroleum Intelligence platform integrating geology, petroleum systems, exploration, contracts, economics, gas monetisation, institutional design and sovereign development. GLIAG’s governing proposition is that information becomes valuable only when it is converted into decision-ready intelligence.

Where Information Becomes Intelligence. From Geology to Sovereignty. From Molecules to Nations.

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