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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract


Pub. Id: A165 (1977)

First Page: 117

Last Page: 133

Book Title: M 26: Previous HitSeismicNext Hit Stratigraphy--Applications to Hydrocarbon Exploration

Article/Chapter: Previous HitSeismicNext Hit Stratigraphy and Global Changes of Sea Level: Part 6. Stratigraphic Interpretation of Previous HitSeismicNext Hit Reflection Patterns in Depositional Sequences: Section 2. Application of Previous HitSeismicNext Hit Reflection Configuration to Stratigraphic Interpretation

Subject Group: Previous HitSeismicNext Hit Stratigraphy, Sequence Stratigraphy

Spec. Pub. Type: Memoir

Pub. Year: 1977

Author(s): R. M. Mitchum Jr., P. R. Vail (2), J. B. Sangree (3)

Abstract:

Previous HitSeismicNext Hit stratigraphy is the study of stratigraphy and depositional facies as interpreted from Previous HitseismicNext Hit data. Previous HitSeismicNext Hit reflection terminations and configurations are interpreted as stratification patterns, and are used for recognition and correlation of depositional sequences, interpretation of depositional environment, and estimation of lithofacies.

Previous HitSeismicNext Hit sequence analysis subdivides the Previous HitseismicNext Hit section into packages of concordant reflections, which are separated by surfaces of discontinuity defined by systematic reflection terminations. These packages of concordant reflections (Previous HitseismicNext Hit sequences) are interpreted as depositional sequences consisting of genetically related strata and bounded at their top and base by unconformities or their correlative conformities. Reflection terminations interpreted as stratal terminations include erosional truncation, toplap, onlap, and downlap.

Previous HitSeismicNext Hit facies analysis interprets environmental setting and lithofacies from Previous HitseismicNext Hit data. Previous HitSeismicNext Hit facies units are groups of Previous HitseismicNext Hit reflections whose parameters (configuration, amplitude, continuity, frequency, and interval velocity) differ from adjacent groups. After Previous HitseismicNext Hit facies units are recognized, their limits defined, and areal associations mapped, they are interpreted to express certain stratification, lithologic, and depositional features of the deposits that generated the reflections within the units. Major groups of reflection configurations include parallel, subparallel, divergent, prograding, chaotic, and reflection-free patterns. Prograding configurations may be subdivided into sigmoid, oblique, complex sigmoid-oblique, shingled, and hummocky clinoform configurations External forms of Previous HitseismicNext Hit facies units include sheet, sheet drape, wedge, bank, lens, mound, and fill forms. Previous HitSeismicNext Hit facies units are interpreted in terms of the depositional environments, the energy of the depositing medium, and the potential lithologic content of the strata generating the Previous HitseismicTop facies reflection pattern.

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