SEISMIC REFLECTION APPLIED TO SEDIMENTOLOGY AND GAS DISCOVERY IN THE GULF OF CADIZ*

Autor: B. G. Sineriz, J. Delaplanche, Y. Lafet, M. A. Remon Gil
Rok vydání: 1982
Předmět:
Zdroj: Geophysical Prospecting. 30:1-24
ISSN: 1365-2478
0016-8025
Popis: In the Gulf of Cadiz, a Tertiary basin became filled by clastic series during Miocene and Pliocene times. This terrigenous influx, derived from the Iberic Meseta in the north, is characterized by a sandy episode during the Tortonian and Messinian. The sand deposits were probably connected with uplift and major erosion of the Meseta during the sliding of the olistostrome, which occupied the south of the basin from late Helvetian to middle Tortonian. High-resolution seismic techniques produced a good picture of the stratigraphy and of the depositional environment of the sands. A further study, using the amplitude of the reflections, inversion of seismic traces into acoustic impedance traces, and modeling, provides a remarkable example of the possibilities of seismic stratigraphy for depicting the lateral evolution of facies and localizing hydrocarbon occurrences. Out of seven exploratory wells based upon seismic information, six encountered gas-bearing sands with economic potential.
Databáze: OpenAIRE
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