What is the total number of wells drilled and completed in the World and what types of completions used in general?

As of 2023, millions of oil and gas wells have been drilled globally, with estimates often exceeding 3 million active wells. The types of completions used generally include conventional completions, which may involve perforated casing and production tubing, and more complex methods like horizontal drilling and hydraulic fracturing (fracking) that enhance production from unconventional reservoirs. Additionally, other completion techniques such as multilateral completions and smart wells are utilized to optimize extraction and manage reservoir performance. The specific numbers can vary widely depending on the source and region.