Uma metodologia para determinação da vazão de explotação em poços do sistema aquífero cristalino no cariri paraibano.

Abstract

The semi-arid Northeast of Brazil presents serious problems of water allocation in the face of a geographically spaced rainfall, combined with its concentration of 3 to 5 months of the year, and sharp fluctuations in relation to annual averages, which causes the scourge of drought. In this study, a statistical analysis was done on the data of hydrodynamic parameters of wells that are inserted into the micro-region of West Cariri Paraiba. The aim was to determine the flow rate of exploitation, using hydrodynamic data of wells in production tests performed by the CDRM. For this procedure, a methodology was used, based on the determination of the extrapolated flow, strictly obeying a period of four days, through the specific flow chart versus time. Thereafter, we determined the extrapolated flow adjusted, the average negative deviation and the line of exploitation. The results that showed that for certain ranges of percentage recovery, determining the flow rate of exploitation does not show consistency, that is, for any value of the production test, you can get the same value as the flow rate of exploitation in any intervals. With the refinement of data, analyzing other ranges of percentage of recovery, it was possible to determine the flow rate of exploitation, using only three lines, where the first two intervals condensed into one, creating a band.