A new method for interpreting well-to-well interference tests and quantifying the magnitude of production impact: theory and applications in a multi-basin case study

Abstract Interference tests are used in shale reservoirs to evaluate the strength of connectivity between wells. The results inform engineering decisions about well spacing. In this paper, we propose a new procedure for interpreting interference tests. We fit initial response with solution 1D diffusivity equation at an offset observation point. It is advantageous use response, rather than subsequent trend, because less affected by nonlinearities, time-varying boundary conditions, and uncertainties flow geometry regime. From curve fit, estimate hydraulic conductivity fractures connecting For purposes, it would be useful quantify impact on production. Thus, seek relationship ‘degree production interference’ (DPI) appropriate dimensionless quantity that can derived from fracture conductivity. Using simulations run under wide range find classical definition does not achieve consistent prediction DPI. This occurs was assuming radial geometry, but dominant during linear. also Chow Pressure Group metric yield consistently accurate predictions As alternative, derive similar ‘dimensionless conductivity,’ which linear, radial, geometry. approach, calculate length’ collapses all cases onto single predicts DPI as function conductivity, spacing, formation properties. conclude applying method field Anadarko Delaware Basins.