By Andrey Ostroukh 

SOCHI, Russia--Russia is considering diversifying its debt portfolio away from countries that have imposed sanctions on Moscow and into the papers of its Brics partners, Finance Minister Anton Siluanov said Saturday.

Australia, Canada, the European Union, Japan, the U.K. and the U.S. have imposed sanctions against Russia in recent months to punish it for the annexation of the Ukrainian region of Crimea and for supporting anti-Kiev rebels in eastern Ukraine. The sanctions have pressured Russia's finances, prompting the Kremlin to seek tighter ties with the emerging world.

Speaking on the sidelines of an annual investment forum in the Black Sea town of Sochi, Mr. Siluanov said the Finance Ministry wants to diversify its investment basket, and is looking for higher yields without too much risks. He said the ministry will consider buying papers issued by Brazil, India, China and South Africa, which along with Russia are known collectively as the Brics countries.

"[We would like to] walk away from investing in papers of the countries that impose sanctions against us," Mr. Siluanov said, adding that the reshuffle would be carried out gradually. He didn't elaborate on when the first purchases of Brics debt may take place.

Mr. Siluanov said such a move wouldn't be aimed at punishing the West because Russia's share in their papers is so small they wouldn't feel the effect.

When asked whether the diversification would mean Russia was preparing for financial isolation in the long term, Mr. Siluanov said he hopes Western sanctions would be lifted soon but said that his ministry should be ready for other scenarios.

Russian Economy Minister Alexei Ulyukayev said Saturday he expects no more sanctions against Russia but doesn't expect the existing measures to be scrapped in the near term, Russian news agencies reported.

As of early September, the Finance Ministry's reserve fund, accumulated over years of buoyant oil prices and kept in low-risk debt securities, stood at $91.7 billion, or 4.7% of the country's gross domestic product. In early September, the ministry also had $85.3 billion in Russia's National Wealth Fund, meant for infrastructure investments.

After draining more than $70 billion in net capital outflow in the first half of the year, Russia is on track to post its weakest growth in a decade--excluding 2009, when the economy contracted amid the global crisis.

Mr. Siluanov said that OAO Rosneft, the country's largest oil producer, and OAO Novatek, its No. 2 gas firm, may each receive from 80 billion rubles ($2.08 billion) to 150 billion rubles from the National Wealth Fund by the end of this year, with both companies facing pressure from the effects of the sanctions.

Amid the need to support hungry-for-money companies, the ministry is looking at ways to plug in holes in its budget. Next year, Russia may extract up to 500 billion rubles from the reserve fund, tapping the coffers for the first time in six years. The government may also introduce taxes for public catering, taxis and accommodation at hotels, Mr. Siluanov said.

But despite the budget constraints, Russia will stick to its international agreements and will channel money into a planned Brics bank.

"If there's an agreement on the international level, it has to be fulfilled," Mr. Siluanov said.

The five Brics countries will open a development bank by 2016 and create an alternative to the International Monetary Fund to support the bloc's economies, Russia's finance minister said Wednesday.

Each Brics country will contribute $2 billion to the bank's funds from their budgets over the next seven years. They will also consider creating a fund, which Mr. Siluanov dubbed a "mini IMF." China would contribute $41 billion to this fund, another $5 billion would come from South Africa, while Russia, Brazil and India would each provide $18 billion from their foreign-exchange reserves.

Write to Andrey Ostroukh at andrey.ostroukh@wsj.com