Mineralogy and distribution of clays in the Naricual and Oficina Formations from the Eastern Venezuela Basin

Authors

  • Marllelis Gutiérrez-Hinestroza Universidad Estatal Península de Santa Elena, Ecuador
  • Sadi Iturralde Universidad Estatal Península de Santa Elena, Ecuador
  • Edison Brito Universidad Estatal Península de Santa Elena, Ecuador
  • Gilda Rubira-Gómez Universidad Estatal Península de Santa Elena, Ecuador
  • Yolanda Limones-Borbor Universidad Estatal Península de Santa Elena, Ecuador

DOI:

https://doi.org/10.26423/rctu.v5i2.421

Keywords:

Formation damage, Clay minerals, Fines migration, Veneuela

Abstract

The Naricual (Late Oligocene-Early Miocene) and Oficina (Miocene) formations belonging to the Eastern Venezuela Basin are of economic importance due to the high oil-bearing potential. However, an accelerated decrease in production in the fields of this basin, caused by several factors, among them those related with fines migration and the formation damages generated by the presence of different clay minerals. The aim of this work is to determine the composition and distribution of the mineralogical phases present in the producing sands in both formations, in order to establish the extent of the formation damage that the clay minerals can generate. The mineralogical characterization was carried out by petrographic analysis, X-ray diffraction (XRD), dissolution assays in acids and Scanning Electron Microscopy (SEM). The mineralogy of the samples is governed by quartz, albite, calcite, dolomite, pyrite and muscovite. The predominant clay is kaolinite, although chlorite, illite / smectite and glauconite were detected in some samples; the percentage of clays ranges between 6 and 12%, with an average of 6.8% for the Naricual sandstones, and 7.2% for Oficina. The results obtained constitute a fundamental input when orienting action plans aimed at increasing production.

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References

Avila, J. (1999) Abreviatura de los minerales. Disponible en: https://www.academia.edu/17279659/Abreviaturas_de_Los_Minerales_1999

Bjorlykke, K. (2015). Petroleum Geoscience. From Sedimentary Environments to Rock Physics. New York, USA: Springer.

Chapman, R. (1983). Petroleum Geology. Amsterdam, Netherlands: Elsevier.

Feng P, Wang D, Liu G, Wang H. Economides M. (2011). Sandstone Reservoir Stimulation Using High-Temperature Deep-Penetrating Acid. SPE Western North American Region Meeting (Anchorage Alaska USA), pp. 1–11

Gabriel, G. y Inamdar, G. (1983). An experimental investigation of fines migration in porous media. En: Paper SPE 12168, 1983 Annual Technical Conference and Exhibition, San Francisco, California, USA.

Galal, S. Elgibaly, A., Elsayed, S. (2016). Formation damage due to fines migration and its remedial methods. Egyptian Journal of Petroleum25(4), 515-524. doi: 10.1016/j.ejpe.2015.11.005.

González de Juana C., Iturralde de Arozena J. M. y Picard C. (1980). Geología de Venezuela y sus Cuencas Petrolíferas, Tomo II. Caracas, Venezuela: FONINVES.

LEV (1999). Léxico Estratigráfico de Venezuela. Versión Electrónica. INTEVEP, filial de Petróleos de Venezuela, PDVSA. Recuperado de http://lev.desarrollominero.gob.ve

Mosser-Ruck, R., Devineau, K., Charpentier, D., Cathelineau, M. (2005). Effects of ethylene glycol saturation protocols on XRD patterns: a critical review and discussion.Clays and Clay Minerals,53, 631-638.

Pettijohn F, Potter P y Siever R. (1987). Sand and sandstone. New York, USA: Springer –Verlag. Segunda edición.

Polanco Ferrer, R. (2004). Estudio estructural del borde norte de la subcuenca de Guárico en la región de Altagracia de Orituco, estado Guárico, Venezuela. Trabajo Especial de Grado, Escuela de Geología, Minas y Geofísica, Universidad Central de Venezuela, 152 pp.

Reynolds, R. (1965). An X-ray study of an ethylene glicol-montmorillonite complex. American Mineralogist50, 990-1001.

Rojas, F. (2013). Síntesis de la evolución tectono-estratigráfica, Subcuenca de Maturín, Oriente de Venezuela. Recuperado de http://www.redciencia.cu/geobiblio/paper/2013_Rojas_GEO1-O8.pdf

Schlumberger (1997). WEC 1997, Evaluación de pozos. Schlumberger Surenco, Houston, USA.

Xiao, J., Wang,J., y Sun, X. (2017). Fines Migration: Problems and Treatments. Oil & GasResearch3,pp. 123. doi: 10.4172/2472-0518.1000123

Published

2018-12-20

Issue

Section

Original Articles

How to Cite

Mineralogy and distribution of clays in the Naricual and Oficina Formations from the Eastern Venezuela Basin. (2018). UPSE Scientific and Technological Magazine, 5(2), 65-73. https://doi.org/10.26423/rctu.v5i2.421