press release

Chevron Press Release - Chevron/Texaco Unit Announces Record Geothermal Well

SAN FRANCISCO, June 25, 1997 -- Chevron and Texaco today announced that their jointly held Indonesian affiliate, Amoseas Indonesia Inc., has successfully tested a tremendous geothermal well in Indonesia which produced the highest dry steam rates in the Eastern Hemisphere. This well is the latest step toward confirming the potential of the Darajat Contract Area in western Java as a major resource to generate electricity for Indonesia.

Amoseas, a Chevron Corp. and Texaco Inc. joint venture, is a partner in a Joint Operating Contract with Indonesia's national oil company Pertamina to develop the Darajat geothermal resource, located near Garut, West Java, Indonesia.

Well DRJ-16 was drilled to a total depth of 5,988 feet (1,942 meters) and tested at a sustained rate of 55 kilograms of dry steam per second at 13.5 bar wellhead pressure. This single discovery well will generate enough steam to power a 20-megawatt generator -- nearly one-third of the total requirement for the 70-megawatt powerplant currently under construction at Darajat. This places DRJ-16 third in the world in steam resources. Independent consultants verify that only two other wells in the world, [MLM-4 at The Geysers development area in California, and Hawaii's KS-9] have tested at higher rates.

"We are thrilled with the results of this well," said James W. Cox, general manager of Amoseas. "DRJ-16 represents the latest in a series of significant drilling successes at Darajat. In fact, four of our five recently completed wells are within 85 percent of this record. These repeated drilling successes at Darajat demonstrate the potential of Indonesian geothermal energy as a contributor to a growing electrical power infrastructure in this country."

Amoseas operates the geothermal steamfield at Darajat in support of a 55-megawatt powerplant operated by PLN, the Indonesian state-owned electricity company. Amoseas is currently constructing a 70-megawatt powerplant at the site which it will own and operate to generate electricity for the Java/Bali power grid. Drilling operations are ongoing in support of the new installation and to confirm additional geothermal resources for further expansion.

Notes to Editors:

Darajat is operated by Amoseas Indonesia, a jointly held unit of Chevron and Texaco, which was established in 1970 to conduct oil and gas exploration and production in Indonesia, outside of the island of Sumatra.

Its sister company, PT Caltex Pacific Indonesia (CPI), another jointly held affiliate of Chevron and Texaco, has extensive operations on Sumatra, including the world's largest steamflood at the Duri oilfield. Duri operations produce approximately 300,000 barrels of oil per day, utilizing steam technology to help coax the field's viscous crude to the surface. CPI produces more than 750,000 barrels of oil per day (including the production from Duri) from its fields in Central Sumatra under various production-sharing arrangements with PERTAMINA.

  • Darajat taps its energy from a young volcano on the "Ring of Fire," the world's most active volcanic zone which, in part, stretches along the southern coast of Sumatra and Java.
  • Geothermal energy is a clean, renewable energy resource produced when ground water descending from the earth's surface meets molten magma rising toward the earth's surface, creating steam. The steam is trapped in the earth's crust in "pockets" or reservoirs, which can be accessed by drilling a well into the reservoir, similar to the way oil and natural gas are produced.

Updated: June 1997