Angola produces a diverse portfolio of crude oil grades from its deepwater blocks and onshore Cabinda complex, each with distinct quality characteristics that determine their refining value, market pricing, and buyer preferences. This reference guide provides detailed specifications for each major Angolan grade, explains how quality characteristics affect pricing, and identifies which refiners globally are the natural buyers for each stream.
Understanding Crude Oil Quality Parameters
Before examining individual grades, it is useful to understand the key quality parameters that define crude oil value.
API Gravity
API gravity measures the density of crude oil relative to water, with higher values indicating lighter (less dense) oils. Light crudes (above 31 API) generally command premium pricing because they produce higher yields of valuable light products (gasoline, naphtha, jet fuel) with lower processing complexity. Medium crudes (22–31 API) require more intensive processing to maximize light product yields. Heavy crudes (below 22 API) require complex refinery configurations with upgrading units (cokers, hydrocrackers) to extract maximum value.
Sulfur Content
Sulfur content, expressed as a weight percentage, determines whether a crude is classified as “sweet” (low sulfur, typically below 0.5 percent) or “sour” (high sulfur, typically above 0.5 percent). Sweet crudes command premium pricing because they require less intensive desulfurization processing to produce finished products that meet environmental fuel quality standards. Sour crudes require dedicated desulfurization units (hydrotreaters, hydrodesulfurizers), adding processing cost and capital investment.
Total Acid Number (TAN)
TAN measures the concentration of organic acids in crude oil, which can cause corrosion in refinery equipment. High-TAN crudes (above 0.5 mg KOH/g) require specialized metallurgy and processing conditions, which limits the number of refineries that can process them and typically results in a pricing discount.
Yield Structure
The distillation yield of a crude oil—the proportions of gasoline, naphtha, kerosene/jet fuel, diesel, vacuum gasoil, and residue produced during atmospheric and vacuum distillation—is a primary determinant of refining value. Crudes with higher yields of middle distillates (diesel, jet fuel) are particularly valued in markets with strong distillate demand.
Major Angolan Crude Grades
Girassol
Block: 17 (operated by TotalEnergies) API Gravity: ~31 Sulfur: ~0.3% Classification: Light, sweet Production: Approximately 100,000–120,000 barrels per day at peak; declining
Girassol is Angola’s benchmark light crude, named after the giant deepwater field discovered in 1996 and developed through the Girassol FPSO. The grade’s light, sweet characteristics make it attractive for simple-configuration refineries that maximize gasoline and naphtha yields. Girassol typically trades at a premium of $1–3 per barrel to Dated Brent, reflecting its favorable quality.
Primary buyers include Indian refiners (IOC, BPCL, HPCL), South Korean refiners (SK Innovation, GS Caltex), and European refiners seeking light, sweet blending components. The grade competes with Nigerian Bonny Light, Equatorial Guinea’s Zafiro, and Libyan Es Sider in the light, sweet African crude market.
Dalia
Block: 17 (operated by TotalEnergies) API Gravity: ~23.6 Sulfur: ~1.5% Classification: Medium, sour Production: Approximately 80,000–100,000 barrels per day at peak
Dalia is a medium-gravity, higher-sulfur grade produced from the Dalia field development in Block 17. The grade’s heavier, more sour characteristics position it as a refinery feedstock for complex refineries with desulfurization and upgrading capabilities. Dalia typically trades at a discount of $2–5 per barrel to Dated Brent.
Primary buyers include Chinese state refiners (Sinopec, PetroChina), Indian complex refiners (Reliance Industries at Jamnagar), and European complex refineries (particularly in the Mediterranean). Dalia competes with Nigerian Forcados, Middle Eastern medium-sour grades, and Brazilian pre-salt crudes.
Nemba
Block: 15/06 (operated by ENI/Azule Energy) API Gravity: ~38 Sulfur: ~0.14% Classification: Light, sweet Production: Approximately 40,000–60,000 barrels per day
Nemba is one of the lightest and sweetest Angolan grades, produced from fields in Block 15/06 operated by ENI through the Azule Energy joint venture. Its extremely low sulfur content and light gravity make it a premium feedstock that produces high gasoline and naphtha yields. Nemba typically trades at a premium of $2–4 per barrel to Dated Brent.
The grade is particularly valued by refineries in Japan, South Korea, and India that prioritize low-sulfur feedstock for producing ultra-low-sulfur diesel and gasoline that meets stringent environmental specifications.
Hungo
Block: 14 (operated by TotalEnergies) API Gravity: ~28.2 Sulfur: ~0.6% Classification: Medium, sweet/intermediate Production: Part of Block 14 commingled production
Hungo is produced from the Hungo field in Block 14, one of Angola’s longest-established deepwater production areas. The grade’s intermediate gravity and moderate sulfur content position it as a versatile refinery feedstock suitable for a wide range of refinery configurations. Hungo typically trades at a modest discount to Dated Brent ($0–2 per barrel), reflecting its balanced quality profile.
Hungo competes with a broad range of West African medium grades and is purchased by refiners across China, India, Europe, and other Asian markets.
Kissanje
Block: 14 (operated by TotalEnergies) API Gravity: ~30 Sulfur: ~0.35% Classification: Light, sweet Production: Part of Block 14 commingled production
Kissanje, also produced from Block 14, is a light, sweet grade that sits just above the light crude threshold. Its quality profile is similar to Girassol, making it attractive to the same buyer segments. Kissanje typically trades at a premium close to Dated Brent parity.
Plutonio
Block: 18 (operated by BP/Azule Energy) API Gravity: ~33 Sulfur: ~0.04% Classification: Light, very sweet Production: Approximately 60,000–80,000 barrels per day at peak
Plutonio is an ultra-low-sulfur light crude produced from Block 18, operated by BP through the Azule Energy joint venture. The grade’s extremely low sulfur content (less than 0.05 percent) makes it one of the sweetest crudes produced globally. Plutonio commands premium pricing, typically $2–5 per barrel above Dated Brent, and is sought by refineries prioritizing low-sulfur product output.
Japanese and South Korean refiners are particularly active buyers of Plutonio, as it enables them to produce finished fuels that comply with the strictest environmental standards with minimal desulfurization processing.
Cabinda Blend
Block: Cabinda onshore (operated by Chevron through CABGOC) API Gravity: ~31.7 Sulfur: ~0.17% Classification: Light, sweet Production: Approximately 60,000–80,000 barrels per day
Cabinda Blend is the oldest Angolan export grade, produced from the onshore and shallow-water Cabinda complex that has been in production since the 1960s. Despite the maturity of the producing fields, Cabinda Blend remains a significant export stream with favorable light, sweet characteristics. The grade typically trades at a modest premium to Dated Brent.
Chinese refiners are major buyers of Cabinda Blend, and the grade has historically been among the most liquid Angolan crudes in the spot market.
Pazflor
Block: 17 (operated by TotalEnergies) API Gravity: ~24 Sulfur: ~0.5% Classification: Medium, sweet/intermediate Production: Approximately 50,000–70,000 barrels per day at peak
Pazflor is produced from the Pazflor field development in Block 17, which was notable as the first development to commingle production from different reservoir types (Miocene and Oligocene) on a single FPSO. The grade’s medium gravity and moderate sulfur content make it a versatile feedstock that is attractive to complex refineries. Pazflor typically trades at a discount of $1–3 per barrel to Dated Brent.
CLOV Blend
Block: 17 (operated by TotalEnergies) API Gravity: ~33 Sulfur: ~0.45% Classification: Light, sweet/intermediate Production: Approximately 80,000–100,000 barrels per day at peak
CLOV (Cravo, Lirio, Orquidea, and Violeta) is a commingled grade produced from four satellite fields developed through the CLOV FPSO in Block 17. The grade’s light gravity and relatively low sulfur content make it competitive with other premium West African light crudes. CLOV typically trades near Dated Brent parity.
Mondo
Block: 32 (operated by TotalEnergies) API Gravity: ~28 Sulfur: ~0.25% Classification: Medium, sweet Production: Approximately 30,000–40,000 barrels per day
Mondo is produced from the Kaombo development in Block 32, which uses two converted VLCCs as FPSOs. The grade’s medium gravity and low sulfur content make it a well-balanced feedstock. Mondo typically trades at a modest discount to Dated Brent.
Pricing Dynamics
Differential Pricing
Each Angolan grade is priced as a differential to Dated Brent. Sonangol EP sets monthly official selling prices (OSPs) that serve as reference prices for term contracts, while spot market transactions trade at prevailing market differentials. Key factors affecting differentials include crude quality relative to Brent, supply-demand balance for the specific grade, seasonal refinery demand patterns, and freight economics to the destination market.
Grade Competition
Angolan grades compete within their quality segment against other West African producers (primarily Nigeria), North African producers (Libya, Algeria), and, increasingly, against US light sweet crude exports and Brazilian pre-salt production. The competitive positioning of each grade depends on the interaction of quality premiums, freight economics, and buyer preferences. For trade flow analysis, see our article on crude oil trade flows from Angola.
Implications for Domestic Refining
The diversity of Angola’s crude portfolio has implications for domestic refining investment. A new Angolan refinery would need to be designed to process the specific crude grade or blend available for domestic processing. Light, sweet grades offer higher yields and lower processing complexity, but they also command premium export prices, creating an opportunity cost when allocated to domestic refining. Medium and heavier grades may offer better refining economics (lower feedstock cost) but require more complex refinery configurations. For refining analysis, see our article on Angola’s fuel import bill and refining alternatives.
For export market analysis, see our articles on Angola’s oil exports and the broader Angola oil and gas industry overview.