Comparative analysis of inflow performance relationship and pressure buildup well testing methods using the evidence from Tatneft’s fields

Background. Formation evaluation and well testing are key to meeting the challenges associated with oil and gas field development. Selection of the most efficient and informative method always involves consideration of technological and process specifics for each particular case. Objective. To present a comparative analysis of the efficiency of well testing methods to identify the optimal conditions for application of each method in terms of several criteria: test period, scope of information obtained, production losses, reservoir pressure and productivity index estimates. Materials and methods. The paper presents the results of two well testing methods: pressure buildup analysis and inflow performance relationship curves. These tests were conducted as prescheduled and according to developed test design in 16 wells equipped with sucker rod pumping unit. Results. Beneficial and negative factors for well testing procedure and performance were determined. Conclusions. The present research is based on practical field test results with comparative analysis of technological and process factors influencing well testing methods and can be used as basis for selection of tests for a particular well.