HOUSTON, March 23 (Reuters) - Shell is

concerned that the Iran war could impact long-term confidence in

the affordability and security of natural gas supplies, said the

company's president of integrated gas, Cedric Cremers.

"These geopolitical shocks...send the wrong signals to

customers around the long-term fundamentals of gas," Cremers

said at the CERAWeek conference in Houston.

The conflict has removed nearly 20% of the world's energy

including LNG from markets after the Strait of Hormuz was

effectively closed. Glencore energy head Maxim Kolupaev,

speaking at the same panel, said that existing LNG volumes can

meet present demand but need to be rerouted.

(Reporting by Curtis Williams in Houston; Editing by Nathan

Crooks.)