Analysis procedures of pressure transient tests with use of S-functions and case studies

Abstract

The previous three papers show we can derive a S-function as long as the complex velocity potential is provided and S-function gives us a good approximation of pressure drops and derivatives and it was extended to the problem with arbitrary boundary shapes.
In this paper, we introduce new methodology (S-methods) for pressure analysis with arbitrary boundary shapes. S-methods include following two steps ;
(1) Derive S-function by matching pressure data with radial composite model.
(2) Select model structures which reproduce the S-function.
Two examples for S-methods are presented. The first is the field example for “Channel and fun” system. The second is “multiple fracture case”.