Novel Single-Trip Well Re-Stimulation Technology Enables Exact Treatment Placement While Significantly Decreasing Intervention Time

Castro, Luis (Baker Hughes Inc.) | Nasir, Ehsaan (Baker Hughes Inc.) | Wilbourn, Maurice (Baker Hughes Inc.)

OnePetro 

Abstract

This paper focuses on an operational review and lessons learned during the deployment of a novel straddle packer system in a refracturing application. The operation involved the deployment of an industry-first high-rate / high-pressure straddle packer to convey a propped refrac job to a previously producing well in a challenging application. The paper will also include relevant notes on operational time optimization derived from the field implementation as well as pre and post-treatment production information.

The paper describes details on overcoming the challenge of effectively isolating a single group of perforations among multiple producing zones of a wellbore in order to deliver a targeted stimulation treatment. The paper also discusses opportunities for improvement and learnings from this novel deployment. Finally the paper analyzes pressure and temperature data gathered during the treatment to assist in understanding job execution as well as post-treatment production information.

The novel stimulation technology enabled the operator to accurately place a propped refrac treatment at 20 bpm in a 200ft-long interval of previously producing perforations in a single run. The application reduced the operational time on location by 30% and reduced the number of runs required to complete the operation. Comparative production results will be shown as a measure of treatment effectiveness.

The paper contributes a novel insight to the intervention, stimulation, and refracturing industries by describing one of the first successful high-rate re-stimulation jobs using a straddle packer with open perforations above and below in a single trip. This insight is relevant as it highlights a cost-effective alternative for reviving existing wells at a fraction of the cost of a new drill, without the need to deploy numerous tools and fluids in multiple trips to achieve the zonal isolation as typically required in a re-stimulation treatment.