The stability region of the tubing performance relation curve
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Abstract
The tubing performance relation curve is a measure of well performance in gas well engineering. It describes the two-phase flow inside a well and as such is modeled as a two-phase one dimensional pipe flow. Convention claims that production points on the TPR curve to the right of its minimum are stable. There also exist claims about the region slightly to the left of the minimum of the TPR curve being stable. To find the stability criteria the time behaviour of a small perturbation from the steady state conditions is modeled and studied. In the end the first claim was indeed verified but further research is suggested to determine if the stable region might be slightly larger.
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