By Kemol King and Sabrina Valle

GEORGETOWN, April 30 (Reuters) - Exxon Mobil Corp ( XOM )

will shut down two offshore oil production projects in

Guyana for two weeks each, between July and August, to connect a

natural gas pipeline, the company's country head Alistair

Routledge told reporters in Georgetown on Tuesday.

The 140-mile (225-km) pipeline will feed Guyana's $1.9

billion gas-to-power project aimed at ending the country's

dependence on imported fuels and at lowering energy costs for

residents.

Exxon has said it will halt production to fulfill a

commitment made with local authorities to have the pipeline

connected by year end, despite delays on the government-run

onshore part of the project.

The proposed pipeline would connect offshore production

vessels to a power plant and a natural gas processing facility.

The power plant and transmission lines will not be fully

operational before end-2025, Guyana officials have previously

said.

The offshore portion of the about $1 billion pipeline

that is under construction by Exxon is 70% complete, Routledge

said.

NO ESTIMATE ON RECOVERABLE RESERVES

At a press conference to update reporters on the company's

works, Routledge said the company stopped revising estimates for

potential recoverable resources as it works to quantify actual

reserves, an industry metric that considers how much of the oil

and gas underground can be commercially developed.

Exxon has not updated in two years its estimates of 11

billion barrels in recoverable resources at the Stabroek block,

despite a number of new oil discoveries.

Exxon has not disclosed a separate reserves number for

the Stabroek block.

"Our greater focus now is on how do we move resource to

reserves, because that's what generates revenue for the

country," Routledge said.

The oil reserves estimates for Guyana are a key component to

define how much of the Stabroek block would be worth on a

potential sale.

The No. 2 U.S. oil producer, Chevron Corp ( CVX ), last

October agreed to acquire Hess for about $53 billion in stock.

But Exxon and CNOOC this year filed an arbitration case claiming

they hold a right of first refusal over Hess' Guyana assets.

That dispute is currently before the International Chamber

of Commerce and is not expected to be resolved until late this

year. None of the parties have disclosed how much they think

the asset is worth.