Abstract

Periodic monitoring of reservoir pressure has got prime importance in any reservoir management programme. Apart from being critical reservoir simulation input, the layer wise pressure data can be utilized to optimize production from individual wells. This data can further be applied to redesign or modify existing water flooding operations in order to control reservoir dynamics for achieving maximum ultimate recovery. Step Rate Test (SRT) helps in determining layerwise pressures in commingled flow. Methodology adopted is to measure Flowing Bottom Hole Pressure (FBHP) as a function of varying choke size by using conventional Production Logging Tool (PLT) sensors and then analyzing the data for obtaining layerwise pressures. Step Rate Test (SRT) has been recently conducted in an injector well of Mumbai High South. Analysis of SRT data has yielded the pressure as well as injectivity index of individual perforated layers.