- Copyright © 2002. The American Association of Petroleum Geologists. All rights reserved.
This article documents the application of high-impact palynology (HIP) in the Maracaibo Basin of Venezuela and its influence on such exploration and production aspects as regional planning and strategies, risk reduction, optimal drilling decisions and investment, petroleum-system modeling, new discoveries, and secondary recovery by fluid injection, among others. High-impact palynology has been defined as the coupling of high-resolution sequence biostratigraphy, multidisciplinary work, and the alignment of palynology with the attainment of business goals. The first part of this article explains the high-resolution ecostratigraphic methods used and the concept of integrated work applied. The second part of the article shows the results obtained in selected case studies, which illustrate the advantages of HIP. Among the most relevant studies are high-resolution ecostratigraphic frames at a basin level, timing between structural trap formation and oil migration, differentiation of petroleum systems in adjacent reservoirs, the concept of palynoblocks in structurally complex areas to estimate missing sections, stratigraphical models for exploratory wells with better predictions of target horizons, fine-scale reservoir correlations, and discovery of new reservoirs. The use of HIP in other areas is recommended, with palynology as a common in-house practice within multidisciplinary teams formed especially for each specific task.
Valenti Rull has worked in Venezuela since 1981. He is a biologist and holds an M.S. degree and a Ph.D. in paleoecology. He worked at Venezuelan Institute for Scientific Research-IVIC as a palynologist from 1981 to 1989 and at Petróleos de Venezuela, S.A. (PDVSA) Exploration and Production as a senior palynologist since 1990. He has been chairman of Past Global Changes (PAGES) at the International Geosphere-Biosphere Programme (IGBP) for Venezuela since 1997. He has conducted basic and applied research in ecostratigraphy, biogeography, evolution, paleoclimatology, and paleoecology of the Neotropics, from Late Cretaceous to Quaternary. He has taught palynology, paleoecology, and ecostratigraphy at the IVIC and the Central University of Venezuela (UCV). Rull has published approximately 65 journal articles, 50 congress abstracts, and 60 technical reports. His personal Web site is <http://mipagina.cantv.net/valenti/vrchome.htm>