Geology & Reservoir Engineering

Geology & Reservoir Engineering is a mod that introduces new mechanics related to geothermal energy, underground water/gas injection, and enhanced oil recovery to Captain of Industry, a full subsurface production layer built around three dedicated injection pumps.

Geothermal power. Three enthalpy tiers of geothermal reservoir — high, medium, and low —
each with its own dedicated extraction well, feeding steam straight into your power grid.

Underground water injection. A dedicated water injection pump recharges geothermal
reservoirs and the vanilla groundwater aquifer over time, so a well-managed field never has to
run dry.

Oil recovery, five ways. A dedicated oil injection pump offers enhanced oil recovery (CO₂
injection), hydraulic fracturing (seawater), thermal EOR (steam injection — real-world cyclic
steam stimulation), and acid stimulation (matrix acidizing) — all working directly on the
vanilla crude oil deposit, recovering additional oil from fields you already have.

Natural Gas — a new resource. A brand-new Natural Gas deposit, extracted by its own well,
appears alongside crude oil as associated gas wherever oil is found — on every built-in map,
custom/downloaded maps, and even retrofitted into your existing saves. Treat it into vanilla
Fuel Gas at the Chemical Plant, burn it directly in a Flare or gas-fired Boiler, or bank it
underground for later with a dedicated gas injection pump offering both storage and thermal
recovery.

Nine new research nodes tie it all together, each positioned and costed to sit naturally
alongside the vanilla tech tree.

On the World Map, a Natural Gas Rig is available using the same core game API as the
vanilla Oil Rig — fully functional whether or not you also run WorldGen++.