Karakterisasi Feed Zone Berdasarkan Data Pts Flowing Dan Data Geologi Pemboran Sumur A Lapangan B

Abstract

Kamojang Geothermal is an active production field owned by PT. Pertamina Geothermal Energy which contains 1 vapor phase fluid. This field often carries out production tests, one of which is the flowing PTS test. This research aims to determine the relationship between the potential size of the feed zone and mineralogy. The research began by observing directly the process of collecting PTS data after well drilling to determine the mass rate of each feed zone. Next, determine the minerals contained in the rock along the depth of the well to conclude at what depth the reservoir zone and caprock zone are in well A, field B. After obtaining these two data, the relationship between the results of the PTS flowing data processing and the geological drilling data will be connected. The results show that the characteristics of the reservoir mineral rock are the appearance of epidote minerals and the caprock section is characterized by the appearance of clay minerals. In the reservoir zone, a feed zone was found at a depth of 1300 mMD and 844 mMD with a mass rate of 62 t/h and 11.19 t/h. The feed zone distribution was found to contain epidote minerals of 1% of 67% of the altered andesite rock at a depth of 844 mMD and epidote minerals of 15% of the 79% of the altered breccia rock at a depth of 1300 mMD.