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CHANCO FORMATION, A POTENTIAL CRETACEOUS RESERVOIR, CENTRAL CHILE
Author(s) -
Cecioni Giovanni
Publication year - 1983
Publication title -
journal of petroleum geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 42
eISSN - 1747-5457
pISSN - 0141-6421
DOI - 10.1111/j.1747-5457.1983.tb00265.x
Subject(s) - geology , caprock , cretaceous , basement , structural basin , submarine pipeline , geochemistry , source rock , metamorphic rock , group (periodic table) , petrology , paleontology , geomorphology , geotechnical engineering , archaeology , chemistry , organic chemistry , history
The Chanco embayment lies 300 km SSW of Santiago, Chile. The sequence within this basin above the metamorphic basement is: Chanco Formation (very clean sandstone), Quiriquina Formation (glauconitic sancistone, rich in organic matter), and Navidad Group (a very good caprock). This section thus contains reservoir, source and caprocks, and is therefore very promising for petroleum investigations. The offshore C‐1 well yielded salt‐water with gas shows, andtwo wells drilled onshore yielded flows of gas. The C‐1 well lies on a gently‐dipping EW‐striking anticlinal structure, the presence of which makes the area very prospective.