This well book summarizes the state of the art in well test interpretation. It emphasizes the need for a controlled downhole environment and high-performance gauges - both of which have made well testing a powerful reservoir description tool. The book covers transient well test behavior, descriptive and reservoir well testing, gas well testing , and the application of simultaneously recorded downhole rate and pressure measurements to well testing. Testing techniques are covered for the following:

• layered reservoirs and horizontal wells
• low-energy wells
• water injection wells
• sucker-rod pumping wells
• multiple wells
• vertical interference

Schlumberger customers can acquire complimentary single copies of this book from their Schlumberger representative.