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Basins having Oligocene-Miocene source rocks

Basin or Province Structural Form Source Rock Dominant Kerogen Type Main Reservoirs Principal Maturation Stage Reference

East Venezuela-Trinidad, Maracaibo

Foredeep

Oficina fm & equiv, deltaic & prodeltaic sh

III (west), II (east)

Miocene-Pliocene ss

Late Tert

Michelson, 1976; Blaser & White, 1984

Niger delta

Delta

Akata & Agbada fm, deltaic sh

III, coal

U Tert deltaic coal ss

Late Tert

Aejedawe et al., 1984; Nwachukwu & Chukwura, 1986; Bustin, 1988

Mackenzie delta

Delta

Tert deltaic sh

III

U Tert deltaic ss

Late Tert

Snowdon, 1980; Snowdon & Powell, 1982

Mahakam delta

Delta

Miocene deltaic sh

III, coal

U Tert Deltaic ss

Late Tert

Combaz & de Matherel, 1978

Californian basins

rift

Monterey fm, diatomaceous sh

II

U Tert ss & sh

Late Tert

Graham & Williams, 1985; Crain et al., 1985

Gulf Coast & Mississippi delta

Half sag & delta

Tert marine & deltaic sh

III

Tert ss

Late Tert & immature

Tipsword et al., 1971; Dow, 1978; Rice & Claypool, 1981

Indonesian basins

Rift

Pematang Brown sh & Banuwati sh, lacustrine sh; Talang-Akar fm, fluviodeltaic sh

III, coal

U Tert ss

Late Tert

Kingston, 1979; Robinson, 1987; Gordon, 1985

North Kalimantan (Baram Delta)

Delta

Miocene deltaic sh

III

U Tert ss

Late Tert

ASCOPE, 1981

North China, Biyang, Nanxiang, Jianghan

Rift

Lacustrine sh

I

Tert ss, Simian carb

Late Tert

Lao & Gao, 1984; Li Desheng et al., 1984; Zha, 1984; Huang et al., 1984; Tong, 1980; Li Chunju et al., 1984

South Caspian

Circular sag

Maykop series & middle Miocene marine sh

II

Pliocene ss

Late Tert

Ali-Zade et al., 1975; Korchagina & Zeynalova, 1986

North Caucasus

Foredeep

Maykop series & middle Miocene marine sh

II

U Tert ss

Late Tert

Burlakov et al., 1987; Shcherbakov et al., 1983; Chepak et al., 1983

Suez

Rift

Rudies fm, marine sh

II

Cret-Miocene ss & carb

Late Tert

Kholief & Barakat, 1986

Carpathian (Ploiesti & western Ukraine)

foredeep

Menelitic sh, marine sh

II

U Tert ss

Late Tert

Paraschiv & Olteanu, 1970; Gavrish, 1985