Preprint Article Version 1 This version is not peer-reviewed

Pressure Detrending in Harmonic Pulse Test Interpretation: When, Why and How

Version 1 : Received: 16 May 2018 / Approved: 17 May 2018 / Online: 17 May 2018 (13:01:50 CEST)

A peer-reviewed article of this Preprint also exists.

Viberti, D.; Salina Borello, E.; Verga, F. Pressure Detrending in Harmonic Pulse Test Interpretation: When, Why and How. Energies 2018, 11, 1540. Viberti, D.; Salina Borello, E.; Verga, F. Pressure Detrending in Harmonic Pulse Test Interpretation: When, Why and How. Energies 2018, 11, 1540.

Journal reference: Energies 2018, 11, 1540
DOI: 10.3390/en11061540

Abstract

In reservoir engineering, one of the main sources of information for the characterization of reservoir and well parameters is well testing. Among the unconventional well testing methodologies, Harmonic Well Testing (HPT) is appealing from an economic standpoint because it could provide well performance and reservoir behavior monitoring without having to interrupt field production. Recorded pressure analysis is performed in the frequency domain by adopting a derivative approach similar to conventional well testing. To this end, pressure and rate data must be decomposed into harmonic components. Test interpretability can be significantly improved if pressure data are detrended prior to interpretation, filtering out non periodic events such as discontinuous production from neighboring wells and flow regime variations which did not respect the designed test periodicity. Therefore, detrending offers the possibility of overcoming the limitation of HPT applicability due to the difficulty of imposing a regularly pulsing rate for the whole test duration (typically lasting several days). This makes HPT attractive for well performance monitoring, especially in gas storage fields. In this paper, the application of different detrending methodologies to synthetic HPT pressure data generated in different reservoir and operational scenarios is presented and discussed. Moreover, a real case application is also presented.

Subject Areas

well testing; detrending; harmonic pulse testing; well performance monitoring; underground gas storage

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