| Title | Integrated Design and Operation of Plug and Abandonment of Geothermal Wells |
|---|---|
| Authors | B.T.H. Marbun, A.R. Novrianto, M.I. Firdaus, D. Setiawan, Y.A.S. Pradana, J.W.A. Nugroho, D.R. Duha |
| Year | 2016 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | Well abandonment, designing, workflow |
| Abstract | The well abandonment operation is part of a well life cycle. It is needed to terminate efforts to produce reservoir fluid from a drilled well and to plug the well without adversely affecting the environment. Failure of the design of the well abandonment may result in harm to the surrounding vegetation near the abandoned well. Plug and abandonment in geothermal wells has many challenges and complexities that increase the cost and the probability of failure, especially in the well abandonment operation. Furthermore, standards for the well abandonment design and procedure for geothermal wells are still not yet available. On the other hand, in the petroleum industry, there are several guidelines and standards that are usually used for plugging and abandoning the well, i.e. American Petroleum Institute (API) Recommended Practice (RP) 96, API Bulletin E3, and Norsk Sokkels Konkuranseposisjon (NORSOK) Standard D-010. Those standards should be modified, so they can be applied for plugging and abandoning geothermal wells. Each requirement of the well abandonment operation based on those standards should then adapted for the design methodology. In this study, a workflow is proposed for designing a well abandonment operation for a geothermal well based on the modified plug and abandonment procedures that are used in the petroleum industry. The proposed workflow of the plug and abandonment operation is then verified using Field X data. The result of the study shows that the proposed workflow can be used for plugging and abandoning Well Y in Field X. Thus, the plug and abandonment of geothermal wells in Field X can be designed and optimized accurately. |