New perspectives in applying the multisensor passive acoustic technique for logging oil and gas wells

Abstract

A substantial increase in oil production from both conventional and unconventional reservoirs can be achieved by ap-plying the multi-stage hydraulic fracturing technologies. These technologies are being constantly improved and well and reservoir performance after multi-stage hydraulic fracturing needs to be monitored both at the stage when each technology is tried out and in those well where a proven technology was applied but the target production level was not reached. This paper describes the results of test well investigations and field tests in which radial distance from the acoustic signal source to well axis was successfully estimated by using a multi-sensor passive acoustic logging tool, thereby making it possible to interpret the signals as the ones caused by reservoir flows.