Successful well tests of 18.9 MW well drilled by Pertamina at Ulubelu, Lampung

Ulubelu geothermal area, Lampung, Indonesia (source: Pertamina Geothermal Energy)
Alexander Richter 30 Jul 2018

PT Pertamina Geothermal Energy (PGE) successfully conducted a well production test with capacity of 18.9 MW at a well drilled for geothermal project at the Ulubelu, Lampung, Indonesia.

In a release last week, PT Pertamina Geothermal Energy (PGE)  and announced it has successfully conducted a well production test with capacity of 18.9 MW at the Ulubelu, Lampung area. The well, which was drilled on 04 November 2017 and completed on January 8, 2018, has a final depth of 2212 MKU (meter depth measurement).

PGE General Manager Ulubelu Dirgo Rahayu stated that the successful production test is expected to increase the continuity of electricity generation from geothermal energy in Lampung. To date, PGE has an installed capacity of 220 MW or 25 percent of electricity in Lampung.

“This is a pride of the best technicians owned by the country, has successfully drilled wells to test production. More wells are successfully drilled and produced, it will further accelerate the electrification ratio and strengthen the electricity network in Lampung – South Sumatra, “he said.

According to Dirgo, the well that was successfully tested is UBL-51 / J1 which is a well of makeup to maintain the availability of steam supply to PLTP in Ulubelu Geothermal Area. The UBL-51 / J1 well was tested on February 8, 2018 using a flat-pressure lip-test method with the aim of knowing the potential of electrical energy that the well can generate at a truly stable condition. From the production test it is known that UBL-51 / J1 well has a capacity of 18.9 MW.

After successful drilling and production testing, PGE Area Ulubelu has also successfully drilled the next well, UBL-52 / J2 on June 24, 2018 with a depth of 2101 MKU (meter depth measurement).

“From the result of P and T measurement, the condition of J2 measurement results resembles J1. However, the potential of these wells can only be known for certain after the production test. This J2 well has not been tested yet because the Drilling and Operation Team of PT PGE is carrying out drilling of J3 wells which have been inoculated since July 12, 2018, “said Dirgo.

Source: Pertamina release