Advances in technology have provided better ways to handle production problems like premature gas or (and) water breakthrough in the field. Selectively shutting-in wells to bypass flow from these thief zones has been made possible using selective completion and inflow control devices (ICD). These practices make the horizontal well behave as if it were segmented. Although pressure transient studies on segmented horizontal wells exist, they do not incorporate the flexibility of shutting well segments at any time as experienced in the field. This work proposes a robust three dimensional analysis of arbitrarily oriented horizontal well segments in anisotropic reservoir; these segments can be shut-in at any time independent of other segments. After solving the flow equations, a point source solution is obtained which is then converted to a line source solution for horizontal wells in clastic reservoirs by integrating over the producing length of the well segments. An arbitrary orientation for the horizontal well is adopted to obtain a general solution in an anisotropic system. From the line source solution, type-curves are generated. This study analyses the effect of selective well completion, number of well segments present, segment length ratios, permeability anisotropy and reservoir dimension on the resulting pressure derivative signature. This work attempts assymptotic flow regime analysis for reservoir parameter estimation and the proposed model matches examples from commercial simulator. The result of this work is attractive when analyzing pressure data from intelligent horizontal wells that can be selectively shut-in and selectively put on production.

No abstract