Organic matter of Agbada formation, Niger delta, Nigeria

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:5563499

Nwachukwu, J I; Chukwura, P I

The status of the Agbada Formation as a major source rock for oil and gas in the Niger delta is debatable. An organic matter survey of the formation in three exploratory wells (Makaraba-26, Abiteye-13, and Okan-25) shows that on the average amorphous organic matter constitutes 63% of the kerogens, whereas terrestrial organic matter (woody remains, spores, and pollen) and recycled (coaly) organic matter make up 30% and 7%, respectively. Pyrolysis data indicate essentially Type III kerogen for the Agbada shales. Thermal alteration index (TAI) and pyrolysis data show that the kerogens are mature in the three wells. The authors estimate that about 2000-4000 ft (600-1200 m) of mature Agbada shales are present in the western part of the Niger delta. Results of organic carbon determinations show that the Agbada shales contain moderate to high amounts of organic matter, which could have sourced some of the oils found in the Makaraba, Abiteye, and Okan fields. Although this view is valid for the western part of the Niger delta, the situation in the other parts of the delta might be different. 6 figures, 3 tables.

• Research Organization: Univ. of Ife, Nigeria
• OSTI ID: 5563499
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 70:1; ISSN AAPGB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
AFRICA
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
DEVELOPING COUNTRIES
GEOLOGIC DEPOSITS
KEROGEN
MATERIALS
MATURATION
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NIGERIA
ORGANIC MATTER
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SHALES
SOURCE ROCKS