Features Organic Oil Recovery improves productivity of existing reservoirs A transitional technology producing excellent results in extracting hard-to-reach oil is attracting the attention of many large operators. Ancient, resident microbes are used to liberate large oil deposits in depleted reservoirs, thanks to science uncovered by studying the humble Australian koala. Roger Findlay, Organic Oil Recovery It began in almost outlandish fashion, with a scientistâs fascination with the complex digestive system of an Australian marsupial, the koala. Today, it has evolved into a green technology that is helping major producers around the world potentially reach billions of dollars of oil that they feared they could never access or bring to the surface.