Field trial of a modified DFIT (pump-in/flowback) designed to accelerate estimates of closure pressure, reservoir pressure and well productivity index

摘要

A problem with the conventional diagnostic fracture injection test (DFIT) design, which involves analysis of the pressure falloff after the pump is shut-off, is the long test times required to achieve closure pressure (p(c)), a proxy for minimum in-situ stress, and after-closure flow regimes that can be analyzed for reservoir pressure in (p(r)) and transmissibility.