MEXICO CITY, June 17 (Reuters) - The Mexican association

that groups major global oil services companies warned that it

is going through an "unprecedented crisis" due to the lack of

payments from the state-owned oil company Pemex, the world's

most indebted energy company.

In a letter sent to President Claudia Sheinbaum and

released on Monday afternoon, the association warned that many

of these companies may have to stop operations as early as July.

The letter did not specify the amounts owned to the group's

members, which include Baker Hughes ( BKR ), Halliburton ( HAL )

, Weatherford, SLB Oil & Gas and Grupo

Mexico.

Pemex, one of Mexico's largest companies, has an outstanding

debt with an extensive list of suppliers and contractors of

around $20 billion, in addition to another financial debt of

$101 billion, despite the injection of billions of dollars from

the government in the last few years to face the amortizations.

In the letter, the Mexican Association of Oil Services

Companies (AMESPAC) urged Pemex to process and release the

invoicing for services rendered in 2024, to guarantee regular

invoicing and timely payment for those of 2025, and to design a

payment plan to settle all historical debts owed to companies of

the sector.

The service sector has significantly decreased its

activities because of the lack of payments from Pemex, AMESPAC

said in the letter, adding that "its cash flow is seriously

compromised and in most cases it cannot guarantee operational

continuity as of July of this year."

"We expect a precise response that addresses our concerns

and reverses the deterioration of national hydrocarbon

production, which compromises Mexico's energy security and

sovereignty," the letter concluded.

This is not the first time that AMESPAC has called on the

government and Pemex to urge payments and their impact on the

state-owned company's hydrocarbon production.

Last week

, Reuters exclusively reported that Hokchi Energy, one of

Mexico's largest private oil producers, has sought new ways to

market its hydrocarbons in the face of delays in payments by

Pemex.

Despite numerous promises of payments and partial

settlements, liabilities continue to accumulate while oil

production continues to fall. Pemex reported an 11% year-on-year

plummet in production during the first quarter, in addition to

posting losses.