Summary of the Evergreen Operating Corporation Rosa No. 283 Well CooperativeResearch Project San Juan Basin. Topical Report, May 1, 1993-January 15, 1994

摘要

The major objectives of the cooperative effort were to: recommend a remedialstimulation treatment to enhance gas production from a previously hydraulically fracture stimulated well; and Evaluate the effect of the remedial stimulation treatment using well testing techniques. The recommended remedial stimulation program consisted of a large volume nitrogen injection treatment followed by a controlled blow-down period, maintaining a high bottomhole flowing pressure. There were indications early in the producing life of the well that the near-wellbore permeability may be stress sensitive. Therefore, high producing back-pressures were maintained during the blow-down period in an attempt to limit cleat closure. However, analysis of post-remedial treatment production data indicates that higher gas rates are achieved at lower wellhead pressure rather than at higher wellhead back-pressure.