Identification of conductive fractures in perched formations with the use of a reformed packer test without well logging

摘要

A simple and efficient improvement on the conventional packer testing technique is described. Based on experience associated with hundreds of packer tests in the past decade, a functional change is proposed with respect to the pressure inflation supply for the packer testing unit. The change involves allowing each packer to be independently controlled with two separate gas-flow delivery systems, allowing for independent inflation and decompression underground. Four types of packer set-up are presented, which are able to be used alternately, according to specific environmental needs. It is believed that this is a small but important technical solution for packer testing failures, particularly as regards low water-level conditions in the well, regardless of whether this is a natural effect or a result of the drilling operation.