Water-to-Value™: produced water, the second reservoir.
On a mature Chadian field, every barrel of oil comes up with several barrels of water. In the Sahel, discarding that water would be a double fault — environmental and economic. EnerTchad intends to treat it, loop it, and extract value from it.
It is the least-told secret of ageing fields: at maturity, a well mostly produces water. On the fields EnerTchad targets — mature assets revived through EOR — the water cut can exceed 85%: for one barrel of crude, more than five barrels of salty, hot water carrying residual oil and minerals. The question is not whether there will be water to manage; that is the certainty of the trade. The question is: what do we do with it?
In the Sahel, where every aquifer counts, EnerTchad’s answer fits in one brand and one programme: Water-to-Value™.
First, do no harm: the closed loop
The programme’s foundation is defensive and non-negotiable: zero discharge targeted. Produced water is separated from the crude, stripped of its oil traces, then reinjected into the original reservoir — where it also supports pressure and serves recovery. Net withdrawal from aquifers must stay minimal: the field’s water works for the field, in a closed loop.
Around every future site, piezometric monitoring of the aquifers documents what neighbouring communities are entitled to demand: that the field does not drink the villages’ water. This lives in our Water management framework and on the Impact & local value page.
Then, create value: salts, co-products, heat
This is where water management becomes an industrial programme. Reservoir water is a brine: it carries salts and minerals that, once separated, have markets — and our Petrochemicals extension looks at brine chemistry precisely as a natural extension of locally sourced EOR chemistry: the same purification know-how, the same industrial customers. The heat of the water coming up can pre-heat processes — instead of burning fuel to do so.
And when treatment reaches the required level, qualified water can serve selected industrial or agricultural uses, at the right standard, case by case. Nothing is automatic: every reuse demands its own qualification, permit and monitoring. But the logic is the same as everywhere in our chain: what comes out of the well must pay twice.
In the Sahel, water is never waste. Not even the water that rises from an oil well.
The economics of the water barrel
Treating water is expensive — often a mature field’s largest operating cost, and one reason majors walk away from such assets. Our bet is the opposite: a frugal, local oil company that reinjects over the shortest distance, pools treatment at its hubs, and converts part of the cost into revenue (salts, co-products, water services for neighbouring operators) can make barrels profitable that others abandon. The EOR’s additional barrel is also won in the water circuit.
Pilots, not promises
EnerTchad is a company in formation: Water-to-Value™ is a pilot programme — characterise the waters of each candidate field, size separation and reinjection, qualify recovery streams one by one. The quantified objectives live in our 2030 targets; the environmental framework, in our commitments.
The principle, though, is already settled: on our fields, water will not be oil’s problem. It will be its second reservoir.