半解析的手法による坑内流体流入制御の評価手法の構築

抄録

The applicability of a semianalytical technique for the evaluation of inflow control effects in complex geological settings is assessed. The semianalytical approach, based on Green's functions, is extended through the development of an improved approximation for near wellbore heterogeneity. The basic heterogeneity model describes the permeability field in terms of a locally varying skin and a global effective permeability. The proposed framework in this work consists of three steps. The first part is to evaluate settings of inflow control devices to achieve uniform fluid inflow to the wellbore with the semianalytical technique. The second step is to convert effects of inflow control devices to skin values to account for the same pressure drop in each completed section. The third step is to evaluate the effects of uniform influx with a full filed finite difference simulation model. Results obtained in this work suggest that the semianalytical approach is a practical tool to model the performance of nonconventional wells (e.g., deviated, horizontal or multilateral wells) equipped with inflow control devices in real filed settings.