Well testing is a specialized industry within the broader category of testing laboratories. Companies in this industry are primarily engaged in testing and analyzing the properties of oil and gas wells. The goal of well testing is to determine the productivity and potential of a well, as well as to identify any issues or problems that may be affecting its performance. This information is critical for oil and gas companies, as it helps them make informed decisions about how to optimize their operations and maximize their profits. Well testing involves a range of different techniques and methods, depending on the specific needs of the well being tested. Some common techniques include pressure testing, flow testing, and fluid sampling. These tests are typically conducted using specialized equipment and tools, which are designed to measure and analyze various aspects of the well's performance.