| Title | Perforation and Acidizing Applications of GK-3 Well, Gumuskoy Geothermal System, Aydin, Turkey |
|---|---|
| Authors | Kuyumcu, O. Caglan; Solaroglu, Umut Z. D.; Atalay, Ozan; Akar, Sertac; Ipek, Bahadir; Ciftci, Mahmut |
| Year | 2011 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Perforation; acidizing; short term flow test; water loss test; Gumuskoy |
| Abstract | Gümü?köy geothermal area is located at the Western of the Büyük Menderes Graben adjacent to Germencik GEPP (47.4 MW) in Ayd?n, Turkey. BM Holding Inc. has been working in this exploration concession since 2005. So far 13 gradient well were drilled with one wildcat exploration well GK-1 and a development well GK-3. GK-1 was completed on 28 May 2009 at a total depth of 2100 meters. Flow tests confirm presence of a geothermal reserve in the Gümü?köy formation, yielding a flow rate of 230 tons/hour and a maximum reservoir temperature of 181 °C. Exploration drilling was continued with development well GK-3 reaching 2057 m depth with a maximum temperature of 165 °C and a flow rate of 115 tons/hour. Post-completion well logs in GK-3 revealed the presence of a high temperature zone behind the cemented 9 5/8” casing in the well at approximately 1050 m depth, where further analysis placed this as an additional production zone. Following detailed analysis, GK-3’s 5 sections (6 m long each) from 1028 m till 1131 m depth was perforated where, jet perforating guns equipped with shaped explosive charges were used. Before the perforation, cold water was injected into the well for 2 days, in order to cool the well for logging-probe operating conditions. Existing and recent CBL logs were used and correlated for precise depth information and application depths. As a result, a production path was created from the production zone into the well bore. Following the operation, acidizing was performed to further increase production. Water loss tests were conducted along each step of the operation as reference for future analyses. These operations resulted in an overall increase of 36 tons/hr for the flow rate of GK-3. |