Print Email Facebook Twitter A semi-analytical model for productivity testing of multiple wells Title A semi-analytical model for productivity testing of multiple wells Author Fokker, P.A. Brouwer, G.K. Verga, F. Ferrera, D. Nederlands Instituut voor Toegepaste Geowetenschappen TNO Publication year 2005 Abstract This paper presents a new, semi-analytical method for calculation of the productivity of vertical, horizontal or multilateral wells draining either gas or oil reservoirs. Well interference effects and the presence of natural or induced fractures are accounted for. The method is based on an earlier derived productivity prediction tool in which now moving pressure boundaries have been implemented to account for time dependence. The semisteady-state pressure equations are solved using combinations of exact solutions around the well in an infinite reservoir and additional solutions to the Laplace equation are introduced to approximate the boundary conditions. The pressures and rates for all the flowing wells are solved in a single step for each required value of the time. Both numerical and analytical approaches have been used to validate the new method. The validity of the moving-boundary approach for the transient well behaviour has been checked against analytical results, whereas a numerical method has been employed to analyse the multi-well response in homogeneous, isotropic reservoirs. Finally, the new method has been applied to real production test data. Both single-well and multi-well production tests performed in different types of reservoirs have been analysed with satisfactory results. Subject Mathematical modelsNatural gasPetroleum reservoirsProductivityIsotropic reservoirsMoving-boundary approachMulti-well production testsPressure equationsWell testing To reference this document use: http://resolver.tudelft.nl/uuid:86764b57-cf60-4625-a4c4-96288b221bdd TNO identifier 280141 ISBN 9073781981 Source 67th European Association of Geoscientists and Engineers, EAGE Conference and Exhibition, incorporating SPE EUROPEC 2005 - Extended Abstracts, 13 June 2005 through 16 June 2005, Feria de Madrid. Conference code: 66893, 477-486 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.