地ち熱ねつ井せい

also: じねつせい

Meanings

1

geothermal well

Technical term in geology and energy engineering for a well drilled to extract geothermal heat.

この地ち域いきでは地熱ちねつせ井いを掘くっ削さくして発はつ電でんに利り用ようしている。
In this region, geothermal wells are drilled and used for power generation.