Preparing a completion design can require time and effort to optimize economic returns. Often, actual production results do not reflect the predicted outcome. Many reasons can account for this discrepancy, ranging from incorrect interpretation of petrophysical analysis to unintentional deviation of design during job execution at the wellsite. Completion analysis is essential for determining why actual and predicted outcomes vary; it also helps determine where inaccurate values entered into the design process.
This paper discusses the methodology used to execute an optimized production design. Wellsite analysis and post-production analysis are essential to this process. The paper describes processes used to obtain data for these analyses and for several other methods used to verify prejob parameters. Onsite fluid tests must be comparable to prejob tests to ensure that fracturing fluids perform in the reservoir as in the laboratory. Well selection, petrophysical and rock mechanics analysis, and design considerations are detailed. Most importantly, the onsite mini-frac analysis intrepetation is the iterative link to verify design parameters and is used to incorporate changes that will achieve the optimum stimulation treatment.