DUBAI- Saudi Aramco will start meeting bond investors next week to persuade them to buy its debut international bond, which will help the world's largest oil producer fund the $69.1 billion purchase of a stake in Saudi Basic Industries Corp (SABIC), sources familiar with the matter said.

The Saudi oil giant, which declined to comment, said on Wednesday it had agreed to buy a 70 percent stake in SABIC from Saudi Arabia's Public Investment Fund (PIF) in one of the largest deals in the global chemicals industry.

The deal could inject billions of dollars into the PIF, giving it the firepower to proceed with its plans to create jobs and diversify the largest Arab economy beyond oil exports.

Aramco has issued local currency bonds in the past, but the planned deal would be its first in the international markets.

International demand for Aramco's bonds is expected to be hefty, given improved conditions across emerging markets, the recent inclusion of Saudi Arabia in key market indexes, and the sheer size of the company, which outweighs peers like Exxon XOM.N and Shell RDSa.L .

Saudi Arabia gets almost 70 percent of its revenues from oil, and Aramco is the sole holder of Saudi oil concessions.

One of the sources said there was a minor sell-off across the Saudi debt curve on Thursday, as some investors prepared to switch Saudi sovereign paper for the upcoming Aramco securities.

Aramco is expected to meet international bond investors next week in a so-called "roadshow" ahead of the debt sale, which the Saudi energy minister previously said would be around $10 billion in size.

Aramco's acquisition of a stake in SABIC has come after months of talks between Aramco and the PIF, which contributed to the delay of Aramco's planned multi-billion dollar initial public offering.

The international bond sale will almost certainly require the company to obtain a credit rating and disclose financial information in a prospectus.

The oil giant has so far been reluctant to disclose many details of its finances.

JPMorgan, Morgan Stanley, HSBC, Citi, Goldman Sachs and National Commercial Bank 1180.SE have been chosen to arrange the bond issue, sources previously told Reuters.

(Reporting by Davide Barbuscia; Additional reporting by Rania El Gamal; Editing by Mark Potter and Elaine Hardcastle) ((; +971522604297; Reuters Messaging: