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Title: Using magnetotellurics in regional hydrocarbon exploration of Parana basin, Brazil

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Geological Survey, Denver, CO
OSTI Identifier:
6434247
Report Number(s):
CONF-8405216-
Journal ID: CODEN: AAPGB
Resource Type:
Conference
Journal Name:
Am. Assoc. Pet. Geol., Bull.; (United States)
Additional Journal Information:
Journal Volume: 68:4; Conference: AAPG annual convention, San Antonio, TX, USA, 20 May 1984
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; BRAZIL; SEDIMENTARY BASINS; EXPLORATION; MAGNETOTELLURIC SURVEYS; GEOLOGIC MODELS; PETROLEUM DEPOSITS; SOURCE ROCKS; STRATIGRAPHY; DEVELOPING COUNTRIES; ELECTRICAL SURVEYS; ELECTROMAGNETIC SURVEYS; GEOLOGIC DEPOSITS; GEOLOGIC STRUCTURES; GEOLOGY; GEOPHYSICAL SURVEYS; LATIN AMERICA; MINERAL RESOURCES; RESOURCES; SOUTH AMERICA; SURVEYS; 020200* - Petroleum- Reserves, Geology, & Exploration

Citation Formats

Stanley, W D, Saad, R A, and Ohofugi, W. Using magnetotellurics in regional hydrocarbon exploration of Parana basin, Brazil. United States: N. p., 1984. Web.
Stanley, W D, Saad, R A, & Ohofugi, W. Using magnetotellurics in regional hydrocarbon exploration of Parana basin, Brazil. United States.
Stanley, W D, Saad, R A, and Ohofugi, W. 1984. "Using magnetotellurics in regional hydrocarbon exploration of Parana basin, Brazil". United States.
@article{osti_6434247,
title = {Using magnetotellurics in regional hydrocarbon exploration of Parana basin, Brazil},
author = {Stanley, W D and Saad, R A and Ohofugi, W},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6434247}, journal = {Am. Assoc. Pet. Geol., Bull.; (United States)},
number = ,
volume = 68:4,
place = {United States},
year = {Sun Apr 01 00:00:00 EST 1984},
month = {Sun Apr 01 00:00:00 EST 1984}
}

Conference:
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