Using magnetotellurics in regional hydrocarbon exploration of Parana basin, Brazil

Conference · Sun Apr 01 04:00:00 EST 1984 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6327666

Stanley, W D; Saad, R A; Ohofugi, W

The magnetotelluric (MT) method has been utilized in a multidisciplinary exploration program recently completed in the Parana basin by the State of Sao Paulo. In the deeper portions of the Parana basin, MT interpretations show that basalts have thicknesses of up to 2 km (6500 ft) and that basement may be as much as 6 km (19,700 ft) below the surface. In most of the basin, the basalts are covered by thin units of Upper Cretaceous to Holocene continental sediments and are underlain by 2-4 km (6500-13,000 ft) of prospective Paleozoic sediments. In addition, interpretation of the MT sounding data with layered and fault-dike models outlines a linear uplift known as the Ponta Grossa arch. Permian Irati sediments are an important source unit classified as mostly in the oil window. Good electrical contrasts occur between the Permian sediments and older units, so that MT measurements can indicate the regional thickness of the Permian and younger sediments for use in interpretation of migration patterns and possible traps. In addition to providing this stratigraphic information, MT and aeromagnetic surveys have delineated the influence of the Sao Francisco craton in truncating uplift and tensional features of the Ponta Grossa arch.

• Research Organization: Geological Survey, Denver, CO
• OSTI ID: 6327666
• Report Number(s): CONF-8405216-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 68:4
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BRAZIL
DEVELOPING COUNTRIES
ELECTRICAL SURVEYS
ELECTROMAGNETIC SURVEYS
EXPLORATION
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOLOGY
GEOPHYSICAL SURVEYS
LATIN AMERICA
MAGNETOTELLURIC SURVEYS
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESOURCES
SEDIMENTARY BASINS
SOURCE ROCKS
SOUTH AMERICA
STRATIGRAPHY
SURVEYS