Resumo

ARAGON-AGUILAR, Alfonso; IZQUIERDO-MONTALVO, Georgina  e  GOMEZ-MENDOZA, Rafael. Comparison of Methodologies of Productivity Decline Analysis in Wells. Tecnol. cienc. agua [online]. 2014, vol.5, n.6, pp.119-134. ISSN 2007-2422.

Among the different methods for productivity decline analysis, are shown applications and results, using two of them, which are: a) Graphic method of type curves, and b) Analysis method by normalizing flow. The obtained values represent properties of the four analyzed producer wells (P5, P13, P17 and P22). Through expanding the analysis to at least 75% of the wells in a field it is feasible the reservoirs characterization. The general diagnosis of the production performance using flow rate data and pressure related with time can be suggested as a reliable methodology. In this paper a general diagnosis using this methodology was applied before start overall analysis. From the general diagnosis graphs, it can be identified the single behavior of each well related to the discharge diameters during exploitation. The behavior of the well, respect to each production diameter is useful in its design for the decline analysis. It is highly recommended the use of at least two of the methodologies for decline productivity analysis in order to obtain a solution with objective criteria. Because in the development of type curve were assumed generalized parameters, the obtained values through application of this analysis are lesser than those obtained using the normalized flow technique. The analysis methodologies used in this work can be applied to oil, geothermal and water wells.

Palavras-chave : Production decline; decline rate; cumulative production; expected recovery; operative life; transmissivity; formation permeability.

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