Oil and Gas Trading Guide: Products, Specifications, Logistics, and International Transactions

Oil and gas are among the most strategically important commodities in international trade. They support transportation, electricity generation, manufacturing, petrochemical production, heating, aviation, marine operations, and numerous industrial processes.

However, an oil or gas transaction involves much more than agreeing on a product and price. Buyers and sellers must evaluate technical specifications, available quantities, storage, transportation, inspection, payment security, regulatory requirements, and counterparty credibility.

A professionally structured transaction clearly defines the product, delivery basis, pricing formula, documentation, quality determination, payment procedure, and responsibilities of every party.

Understanding the Oil and Gas Market

The oil and gas industry includes several connected commercial segments.

Upstream Activities

Upstream activities involve the exploration, development, and production of crude oil and natural gas.

Products obtained at this stage may include:

• Crude oil

• Natural gas

• Condensate

• Natural gas liquids

• Associated gas

• Liquefied petroleum gas components

The characteristics of these products vary according to the producing field, geological formation, and processing methods.

Midstream Activities

Midstream operations connect production areas with refineries, processing facilities, storage terminals, and export markets.

They may include:

• Pipelines

• Gathering systems

• Gas-processing plants

• Storage tanks

• Oil terminals

• LNG liquefaction and regasification facilities

• Tankers and gas carriers

• Rail and road transportation

Midstream infrastructure can determine whether a product is commercially accessible and how efficiently it can reach the buyer.

Downstream Activities

Downstream operations include refining, distribution, wholesale supply, petrochemical production, and the sale of finished petroleum products.

Common downstream products include gasoline, diesel, jet fuel, fuel oil, naphtha, bitumen, lubricants, and petrochemical feedstocks.

Main Oil Products Traded Internationally

Crude Oil

Crude oil is an unrefined hydrocarbon mixture extracted from underground reservoirs. It is processed in refineries to produce fuels, lubricants, petrochemical feedstocks, and other products.

Crude oil grades are commonly differentiated according to:

• Density or API gravity

• Sulfur content

• Acidity

• Viscosity

• Water and sediment

• Metal content

• Salt content

• Pour point

• Distillation characteristics

• Yield of valuable refined products

Light crude oil normally contains a greater proportion of lighter hydrocarbons, while heavy crude oil requires more complex refining. Sweet crude contains relatively less sulfur than sour crude.

A refinery does not select crude oil only according to price. The crude must be compatible with the refinery’s configuration, operating limits, product requirements, and environmental obligations.

Automotive Gasoline

Gasoline is a light petroleum product used primarily in spark-ignition engines.

Important commercial parameters may include:

• Research Octane Number

• Motor Octane Number

• Sulfur content

• Reid vapor pressure

• Benzene content

• Aromatics

• Olefins

• Oxygen content

• Distillation range

• Density

• Gum content

• Lead content

Gasoline standards vary between countries and may also change according to season and climate.

Diesel and Gasoil

Diesel and gasoil are widely used in road transportation, industrial equipment, generators, agriculture, heating, and marine operations.

Specifications may address:

• Cetane number or cetane index

• Sulfur content

• Density

• Flash point

• Viscosity

• Lubricity

• Cold filter plugging point

• Cloud point

• Pour point

• Distillation profile

• Water content

• Total contamination

• Biodiesel content

The buyer should identify the exact national or international standard required at the destination. A general expression such as “diesel fuel” is not sufficient for a binding commercial offer.

Jet Fuel

Jet fuel is produced for aviation turbine engines and must satisfy strict performance, safety, and handling requirements.

Common quality parameters include:

• Flash point

• Freezing point

• Density

• Distillation characteristics

• Smoke point

• Thermal stability

• Sulfur content

• Electrical conductivity

• Water separation

• Existent gum

• Aromatic content

Aviation fuel transactions require careful quality control, traceability, dedicated handling procedures, and compliance with the applicable specification.

Fuel Oil

Fuel oil includes residual and blended petroleum products used in marine engines, boilers, power plants, and industrial heating systems.

Relevant characteristics may include:

• Viscosity

• Density

• Sulfur

• Flash point

• Pour point

• Water

• Ash

• Carbon residue

• Sediment

• Aluminum and silicon

• Vanadium

• Sodium

• Compatibility and stability

Marine fuels may be contracted according to ISO 8217:2024, which defines general requirements and specifications for fuels used in marine diesel engines and boilers before onboard handling.

The International Maritime Organization applies sulfur-emission controls under MARPOL Annex VI. The global sulfur limit for fuel oil used aboard ships is generally 0.50% outside designated emission-control areas, while stricter limits may apply in those areas or under local regulations. Buyers should confirm the requirements applicable to the vessel and trading route through current IMO guidance.

Naphtha

Naphtha is a light hydrocarbon mixture used as a petrochemical feedstock, refinery input, gasoline-blending component, and industrial solvent.

Commercial specifications may include:

• Density

• Paraffin content

• Aromatics

• Olefins

• Sulfur

• Distillation range

• Reid vapor pressure

• Color

• Water

• Lead content

The required specification depends on whether the product will be used for petrochemical cracking, reforming, gasoline blending, or another industrial application.

Bitumen

Bitumen is used mainly in road construction, roofing, waterproofing, and industrial applications.

It may be supplied as:

• Penetration-grade bitumen

• Viscosity-grade bitumen

• Performance-grade bitumen

• Oxidized bitumen

• Polymer-modified bitumen

• Cutback bitumen

• Bitumen emulsion

The buyer should specify the grade, testing standard, packaging, quantity, delivery temperature, and intended use.

Base Oils and Lubricants

Base oils are refinery products used to manufacture automotive, marine, industrial, and specialty lubricants.

Important parameters can include:

• Viscosity at specified temperatures

• Viscosity index

• Flash point

• Pour point

• Sulfur

• Color

• Noack volatility

• Saturates

• Appearance

They may be supplied in bulk, drums, intermediate bulk containers, flexitanks, or other suitable packaging.

Main Natural Gas Products

Pipeline Natural Gas

Pipeline natural gas is transported through fixed transmission and distribution networks.

Specifications may include:

• Methane content

• Higher or lower heating value

• Water dew point

• Hydrocarbon dew point

• Hydrogen sulfide

• Total sulfur

• Carbon dioxide

• Nitrogen

• Oxygen

• Pressure

• Temperature

• Wobbe Index

• Particulate and liquid content

The gas must satisfy the receiving pipeline’s quality and pressure requirements.

Liquefied Natural Gas

Liquefied natural gas, or LNG, is natural gas cooled to a liquid state for storage and maritime transportation.

LNG transactions require specialized infrastructure, including:

• Liquefaction facilities

• Cryogenic storage

• LNG carriers

• Loading and unloading terminals

• Regasification facilities

• Pipeline connections

• Measurement and custody-transfer systems

Commercial LNG specifications may include composition, heating value, density, nitrogen, carbon dioxide, sulfur compounds, temperature, pressure, and Wobbe Index.

Contracts must also address matters such as boil-off gas, cargo heel, vessel compatibility, terminal scheduling, unloading procedures, and custody-transfer measurement.

Liquefied Petroleum Gas

Liquefied petroleum gas, or LPG, commonly consists mainly of propane, butane, or a commercial mixture of both.

LPG may be used for:

• Residential cooking and heating

• Industrial heating

• Petrochemical production

• Automotive fuel

• Aerosol and manufacturing applications

• Agricultural operations

Important parameters may include:

• Propane and butane composition

• Vapor pressure

• Sulfur

• Water

• Residue

• Density

• Volatility

• Corrosion characteristics

LPG requires pressurized or refrigerated storage and suitable carriers, tanks, valves, and safety systems.

Condensate

Condensate is a light hydrocarbon liquid recovered from natural gas production and processing. It may be used as a refinery or petrochemical feedstock or blended with other petroleum streams.

Its value may depend on:

• Density

• Sulfur

• Vapor pressure

• Distillation range

• Mercaptans

• Water and sediment

• Yield of light products

Important Petroleum Product Specifications

The commercial name of a petroleum product does not provide enough information to determine suitability. A detailed specification should be attached to the sales contract.

Density and API Gravity

Density affects product identification, volume-to-weight conversion, transportation calculations, and refinery performance.

API gravity is commonly used to describe the relative density of crude oil and certain petroleum products. Higher API gravity generally indicates a lighter petroleum liquid.

Contracts should identify the testing method, reference temperature, and acceptable range.

Sulfur Content

Sulfur influences product value, refining requirements, emissions, equipment corrosion, and regulatory compliance.

Low-sulfur products may command a different commercial value because they can require additional processing or be suitable for markets with stricter environmental requirements.

Viscosity

Viscosity describes a liquid’s resistance to flow. It is especially important for fuel oil, bitumen, lubricants, and heavy crude oil.

The contract should identify the temperature at which viscosity is measured because the result changes significantly with temperature.

Flash Point

Flash point is an important safety and classification parameter. It indicates the lowest temperature at which vapors may ignite under a specified test method.

A product with an incorrect flash point may create transportation, storage, insurance, and safety problems.

Pour Point and Cold-Flow Properties

Pour point indicates the lowest temperature at which a petroleum product remains capable of flowing under defined test conditions.

Diesel and other middle distillates may also be evaluated using cloud point and cold filter plugging point. These properties are particularly important in cold climates.

Water and Sediment

Water and sediment reduce usable product quantity and can create corrosion, contamination, filtration, and operational problems.

The contract should establish:

• Maximum permitted levels

• Applicable test methods

• Sampling location

• Quantity-adjustment procedures

• Treatment of free water

• Dispute-resolution procedures

Octane and Cetane

Octane measures gasoline’s resistance to engine knocking, while cetane relates to the ignition performance of diesel fuel.

These values should not be confused, and the correct test standard should be identified in the product specification.

Calorific Value

Calorific value indicates the energy produced by combustion. It is especially important in natural gas, LNG, LPG, and certain fuel transactions.

The contract should state whether the measurement is based on gross or net calorific value and identify the units, reference conditions, and calculation method.

How Oil and Gas Prices Are Determined

Oil and gas prices are influenced by international benchmarks, product quality, location, freight, market conditions, and contractual terms.

A price formula may include:

• An agreed benchmark

• A premium or discount

• A pricing period

• Quality adjustments

• Location differentials

• Freight adjustments

• Taxes and duties

• Currency-conversion provisions

• Inspection and terminal costs

• Financing expenses

Crude oil may trade at a differential to an international or regional benchmark. Refined products may be priced against published market assessments for a defined location and delivery period.

Gas pricing can use oil-linked formulas, gas-hub references, fixed prices, hybrid formulas, or negotiated long-term mechanisms.

The contract should clearly identify:

• The exact benchmark publication

• Product category

• Geographic assessment

• Quotation period

• Average-calculation method

• Currency

• Unit of measurement

• Rounding rules

• Premium or discount

• Procedure if the benchmark becomes unavailable

Ambiguous pricing formulas can produce serious disputes.

Delivery Terms in Oil and Gas Contracts

The buyer and seller must determine responsibility for transportation, freight, insurance, export clearance, import clearance, risk, and delivery.

Common arrangements may reference:

• FOB

• CIF

• CFR

• FCA

• CPT

• CIP

• DAP

• Ex-works or ex-terminal arrangements

• Delivered pipeline terms

• Delivered ex-ship structures

The ICC’s Incoterms® 2020 rules help define delivery responsibilities, costs, and the point at which risk transfers between buyer and seller.

However, Incoterms do not replace a complete oil or gas sales contract. The agreement must separately address title transfer, payment, quantity, quality, pricing, inspection, laytime, demurrage, claims, taxes, compliance, and dispute resolution.

The selected rule should be followed by a precisely named port, terminal, pipeline point, tank, or other agreed location.

Transportation and Logistics

Oil Tankers

Crude oil and petroleum products are commonly transported using tankers selected according to cargo type, quantity, route, port limitations, and commercial requirements.

Before nomination, parties may need to assess:

• Vessel age and class

• Flag

• Ownership and management

• Protection and indemnity coverage

• Cargo capacity

• Tank coating

• Previous cargoes

• Heating capability

• Pumping capacity

• Draft and dimensional limits

• Terminal compatibility

• Sanctions and compliance status

• Safety and inspection history

The vessel remains subject to terminal acceptance and any contractual vetting requirements.

Gas Carriers

LPG and LNG require specialized vessels designed to transport pressurized or cryogenic cargoes.

Compatibility reviews may cover:

• Vessel dimensions

• Manifold arrangement

• Loading rate

• Cargo-tank design

• Pressure and temperature

• Vapor-return systems

• Mooring arrangements

• Safety systems

• Terminal operating limits

• Communication procedures

Pipelines

Pipeline transactions require coordination of nomination, pressure, quality, measurement, scheduling, balancing, and delivery-point procedures.

The agreement should define responsibility for off-specification gas or liquids, shortages, interruptions, imbalances, and measurement corrections.

Storage Facilities

Products may be stored in refinery tanks, independent terminals, bonded facilities, floating storage, underground storage, or specialized gas terminals.

Before relying on a storage arrangement, buyers and financiers may verify:

• Facility ownership and operator

• Tank availability

• Storage agreement

• Product title

• Tank capacity

• Insurance

• Inspection access

• Release procedures

• Previous and current inventory

• Whether the product is pledged or financed

• Applicable licenses

Tank receipts and storage documents should be independently authenticated.

Inspection and Quantity Determination

Independent inspection can help verify the product’s quantity and quality at the loading or discharge location.

Inspection activities may include:

• Tank gauging

• Vessel measurements

• Temperature measurement

• Sampling

• Laboratory testing

• Water detection

• Density determination

• Quantity calculations

• Seal verification

• Cargo-condition inspection

• Supervision of loading or discharge

• Review of shipping documents

The contract should identify:

• The approved inspection company

• Who appoints the inspector

• Who pays the inspection costs

• The required sampling procedure

• The applicable laboratory methods

• Whether results are final and binding

• The procedure for retaining samples

• The dispute-testing laboratory

• Quantity and quality tolerances

• Time limits for claims

Representative sampling is essential because a laboratory result is only as reliable as the sample submitted for testing.

Documents Used in Oil and Gas Transactions

Required documents depend on the product, delivery method, origin, destination, and payment structure.

A transaction may require:

• Commercial invoice

• Pro forma invoice

• Sales and purchase agreement

• Certificate of origin

• Certificate of quality

• Certificate of quantity

• Certificate of analysis

• Independent inspection certificate

• Bill of lading

• Cargo manifest

• Packing list, when applicable

• Export declaration

• Import permit

• Insurance certificate

• Tank receipt

• Warehouse receipt

• Terminal release order

• Customs documents

• Vessel documents

• Safety data sheet

• Product passport or refinery certificate

• Bunker delivery note, when applicable

• Pipeline measurement statement

• Tax and regulatory documents

Document requirements should be established before loading. Requesting unavailable or contradictory documents after shipment can delay payment and discharge.

Payment Methods

Documentary Letter of Credit

A documentary letter of credit may provide payment against a compliant set of documents.

The credit should reflect the commercial transaction and avoid requirements that the seller cannot reasonably satisfy.

Important points include:

• Issuing bank acceptability

• Confirmation requirements

• Payment tenor

• Presentation period

• Expiry location

• Required documents

• Quantity tolerance

• Partial-shipment provisions

• Transshipment provisions

• Reimbursement arrangements

• Discrepancy procedures

Standby Letter of Credit

A standby letter of credit can support a payment obligation but normally functions differently from a commercial documentary credit.

Its wording, issuing bank, governing rules, claim conditions, expiry, and verification procedure must be reviewed carefully.

Bank Guarantee

A bank guarantee may support advance payment, performance, or another contractual obligation.

The contract should define:

• Guarantee amount

• Issuing institution

• Beneficiary

• Expiry

• Claim conditions

• Reduction mechanism

• Governing rules

• Release procedure

Advance Payment

A supplier may request partial or full payment before loading. Buyers should conduct enhanced verification before transferring funds.

Possible protections can include:

• Advance-payment guarantee

• Escrow arrangement

• Verified storage control

• Independent inspection

• Milestone-based payment

• Direct payment to an approved terminal or service provider

Open-Account Payment

Established counterparties may agree to payment after delivery. This structure exposes the seller to the buyer’s credit risk and may require credit insurance, receivables financing, or internal credit limits.

A Typical Oil and Gas Trading Process

1. Buyer Inquiry

The buyer provides:

• Exact product

• Required specification

• Quantity

• Delivery schedule

• Destination

• Preferred delivery terms

• Payment method

• Inspection requirements

• Company profile

2. Supplier Review

The supplier evaluates availability, logistics, compliance, pricing, and the buyer’s ability to perform.

3. Commercial Offer

The offer should clearly identify:

• Product and grade

• Quantity and tolerance

• Price or pricing formula

• Delivery point

• Delivery period

• Payment terms

• Inspection

• Offer validity

• Required documentation

4. Due Diligence

Both parties verify corporate identity, beneficial ownership, authority, commercial history, sanctions status, and financial capacity.

5. Contract Negotiation

The parties agree on product, price, quality, quantity, delivery, payment, logistics, claims, and legal terms.

6. Payment Security

The agreed letter of credit, guarantee, deposit, escrow, or other payment arrangement is established and verified.

7. Vessel or Transport Nomination

The responsible party nominates a suitable vessel, carrier, pipeline schedule, truck fleet, or other transportation arrangement.

8. Loading and Inspection

The product is inspected, measured, and loaded according to the contract and terminal procedures.

9. Document Presentation

The seller presents the agreed commercial, inspection, transport, and regulatory documents.

10. Delivery and Settlement

The cargo is delivered, discharged or transferred, and final payment and quantity adjustments are completed according to the contract.

Important Contract Clauses

A professional oil or gas sales agreement may address:

• Product definition

• Specifications

• Quantity and tolerance

• Delivery period

• Pricing formula

• Measurement units

• Currency

• Quality determination

• Quantity determination

• Inspection

• Title transfer

• Risk transfer

• Taxes and duties

• Vessel nomination

• Terminal acceptance

• Laytime

• Demurrage

• Pumping rates

• Insurance

• Payment

• Credit support

• Force majeure

• Change in law

• Sanctions and compliance

• Claims procedure

• Limitation of liability

• Default and termination

• Confidentiality

• Governing law

• Dispute resolution

The contract should clearly separate delivery, risk, and title because they may transfer at different points.

Laytime and Demurrage

Laytime is the contractually permitted period for loading or unloading a vessel. Demurrage may become payable when the agreed laytime is exceeded for reasons allocated to the relevant party.

The contract should define:

• Notice of readiness

• Laytime commencement

• Allowed loading or discharge time

• Weather interruptions

• Terminal delays

• Shifting time

• Documentation delays

• Pumping performance

• Demurrage rate

• Supporting documents

• Claim-notification deadline

Demurrage disputes can become substantial, especially when documentation and operational records are incomplete.

Compliance and Counterparty Verification

Oil and gas transactions can involve high values, several jurisdictions, complex ownership structures, intermediaries, vessels, terminals, and cross-border payments.

Due diligence may include:

• Company-registration verification

• Beneficial ownership

• Director and signatory identification

• Sanctions screening

• Vessel and ownership screening

• Source of product

• Source of funds

• Payment-account verification

• Export-control checks

• Import-license verification

• Tax and customs review

• Environmental requirements

• Anti-bribery controls

• Adverse-media review

The Financial Action Task Force has identified international trade as a potential channel for trade-based money laundering, including schemes involving false documentation, misrepresentation of price or quantity, and complex payment structures. Its official trade-based money-laundering report provides further guidance on relevant risks.

Companies should obtain current professional advice because sanctions, export controls, banking restrictions, and licensing requirements can change.

Common Warning Signs

Potential warning signs in oil and gas offers include:

• Prices significantly below the market without a reasonable explanation

• Refusal to disclose the legal seller

• Requests for payments to unrelated companies or personal accounts

• Unverifiable refinery, terminal, or storage documents

• Claims of unlimited product availability

• Screenshots presented as proof of product or funds

• Pressure to pay large registration or allocation fees

• False claims of government or refinery authorization

• Contracts containing inconsistent product names or quantities

• Documents copied from unrelated transactions

• Unverified bank messages

• Requests to bypass compliance checks

• Complicated intermediary chains with no clear commercial role

• Refusal to permit independent inspection

• Promises of guaranteed allocation without operational confirmation

A professional buyer should verify important claims directly with the relevant bank, terminal, inspector, vessel operator, refinery, or authorized institution.

Choosing a Reliable Oil and Gas Supplier

Before entering a transaction, buyers should evaluate:

• Legal company status

• Beneficial ownership

• Experience in the relevant product

• Evidence of supply capacity

• Export authorization

• Product origin

• Financial and operational capability

• Storage and logistics arrangements

• Inspection procedures

• Contract quality

• Banking relationships

• Previous performance

• Compliance standards

• Responsiveness and transparency

No single document proves that a supplier can complete a transaction. Verification should consider the complete commercial and operational structure.

Reliable Oil and Gas Supply for International Markets

Successful oil and gas trading requires coordination among producers, refiners, suppliers, buyers, banks, inspectors, terminals, shipowners, carriers, insurers, customs authorities, and other service providers.

Our team supports international buyers by coordinating qualified product inquiries, commercial documentation, supplier communication, logistics requirements, inspection arrangements, and transaction procedures.

All product availability, prices, shipment schedules, and payment structures remain subject to confirmation, contract, compliance review, and the policies of the participating parties.

Request an Oil or Gas Quotation

To request a commercial offer, please provide:

• Required product

• Complete technical specification

• Quantity per shipment

• Monthly or annual demand

• Destination country

• Delivery port, terminal, or pipeline point

• Preferred Incoterm or delivery basis

• Required delivery schedule

• Inspection requirements

• Preferred payment method

• Contract duration

• Buyer company profile

Contact us today to discuss your oil and gas requirements and receive a transaction-specific commercial proposal.