Waste Disposal into the Deep Underground – Technical and Economical Considerations for Applications Outside the Oil Industry

For about 25 years the oil industry has disposed of waste into the deep underground (drill cuttings, mud chemicals, sludge, produced<br>water and sand, crude-contaminated soils, etc.). Small-scale annular injection projects are typical for disposing of the waste produced<br>in single drilling campaigns, but large-scale projects are also ongoing using dedicated injection sites, where oil companies are able to<br>dispose up to hundreds of thousands of tonnes of waste every year.