Skip to Main Content

Advertisement

Skip Nav Destination

System identification is an essential step in interval pressure transient test (IPTT) interpretation. System identification consists of recognizing, from pressure/rate transient data, an appropriate interpretation of a well/formation model consistent with earlier or available geoscience information (for additional information on general data preparation and processing and interpretation, see Chapters 12 and 13 of this book and specifically Figs. 13.6 and 13.7 in Chapter 13). Deconvolution is a technique that provides processed data for system identification. In this chapter, we provide fundamentals of the deconvolution technique, including pressure-rate (pr) and pressure-pressure (pp) deconvolution methods that can be applied to IPTT data acquired from the dual-packer module and observation probes shown in Fig. 8.1 of Chapter 8. The details of this configuration are given in Chapter 1. Successful deconvolution of pressure-transient test or IPTT data enables the analyst to identify reservoir behavior without the effects of multirate production, as if the well had been flowing with a constant flow rate or at a constant pressure from the start of the test period, but may still be affected by the wellbore storage, if the flow rate is not measured at the sandface. Deconvolved constant-rate drawdown data increase the radius of investigation to the duration of the entire multiple flow and buildup tests; consequently, rate-variation free-processed pressure data are provided for reservoir characterization.

You do not currently have access to this chapter.
Don't already have an account? Register
Close Modal

or Register

Close Modal
Close Modal