Most helicopter contracts do not have a consequential loss clause so the oil companies will be responsible for their own losses resulting from this.
A bigger problem is that many contracts have the oil company paying during temporary groundings. The question will be how long is temporary, and at what point will force majeur be declared? That could mean that Bristow / Bond / CHC don't get paid during the period of force majeur. But their respective financiers will still want to be paid.
Even if force majeur is not declared, the clock to release contract aircraft or even terminate the contracts has started ticking. The fact is that most contracts can be suspended for much lower rates within 15 - 30 days and terminated within 30 - 60 days. If this is not fixed to allow some flying with restrictions within the next 7 days, it could start to impact operators and their staff.