| Popis: |
Three wells have been successfully drilled, cemented and fracture stimulated in the Kenai Gas Field utilizing an industry unique Casing-Conveyed Perforating System (CCPS). This revolutionary system consists of perforating guns external to the casing and integral valves in the casing for zonal isolation while fracturing. During completion operations all downhole equipment is remotely actuated without wellbore intervention. In addition, downhole sensors were run on all three wells providing monitoring of bottom-hole pressures and temperatures during cement operations, as the cement cures, during stimulation operations, and ultimately over the productive life of the well. Special characteristics of the CCPS, such as the need for precise depth control and irregular geometry, present a unique set of drilling and cementing challenges compared to conventional casing strings. For the case history wells reviewed in this paper a total of 43 perforating modules have been deployed with 15, 12 and 16 modules run in the KBU 42–7, KBU 24–6 and KBU 44–6 wells respectfully. Meticulous pre-planning by a multi-disciplinary team of professionals provided solutions to the many challenges encountered. This paper provides detailed descriptions of the three CCPS wells drilled to date in the Kenai Gas Field, including the drilling, running and cementing requirements and the solutions developed and utilized in field operations. Each of the three CCPS wells completed to date has been deemed engineering, operational and economic successes. |
