Pierre Breber
Vice President and Chief Financial Officer at Chevron
Thanks, Mike. We reported fourth quarter earnings of $6.4 billion or $3.33 per share. Adjusted earnings were $7.9 billion or $4.09 per share. Included in the quarter were $1.1 billion in write offs and impairments in our International Upstream segment and negative foreign currency effects over $400 million. Reconciliation of non-GAAP measures can be found in the appendix to this presentation. Record operating cash flows, in combination with continued capital efficiency, resulted in over $37 billion of free cash flow in 2022.
The only other year Chevron's operating cash flow exceeded $40 billion was 2011. Free cash flow in that year was less than 40% of this year's record. In 2022, Chevron delivered outstanding results on all four of its financial priorities. Announcing earlier this week, another 6% increase in our dividend per share, positioning 2023 to be the 36th consecutive year with annual dividend payout increases, investing within its organic budget despite cost inflation.
Inorganic capex totaled $1.3 billion, nearly 80% for new energy investments. Paying down debt, in every quarter, and ending the year with a 3% net- debt ratio. Returning record annual cash to shareholders through buybacks and exiting the year with an annual repurchase rate of $15 billion. Two days ago, Chevron's Board of Directors authorized a new $75 billion share repurchase program. Now is a good time to look back on our execution of the prior programs. Over the past nearly two decades, we bought back shares in more than three out of every four years, returning more than $65 billion to shareholders.
And we've done it below the market average price during the whole time period. Going forward, with the new program, our intent is the same. We are steady buyer of our shares across commodity cycles. With a breakeven Brent price around $50 per barrel to cover our capex and dividend and with excess balance sheet capacity, we're positioned to return more cash to shareholders in any reasonable oil price scenario.
Turning to the quarter, adjusted earnings were down nearly $3 billion compared with last quarter. Adjusted upstream earnings decreased primarily on lower realizations in liftings, as well as higher exploration expense, partially offset by favorable timing effects. Adjusted downstream earnings decreased primarily on lower refining and chemicals margins and negative timing effects, partially offset with higher sales volumes following third quarter turnarounds. The other segment charges increased mainly due to accruals for stock-based compensation.
For the full year, adjusted earnings increased more than $20 billion compared to the prior year. Adjusted upstream earnings were up primarily due to increased realizations. Other items include higher exploration expenses, higher incremental royalties and production taxes due to higher prices, partially offset by favorable tax benefits and other items. Downstream adjusted earnings increased primarily due to higher refining margins, partially offset by lower chemical earnings and higher maintenance and turnaround costs. 2022 production was in line with guidance after adjusting for higher prices.
As a reminder, Chevron's share of production is lower under certain international contracts when actual prices are higher than assumed in our guidance. Reserves replacement ratio was nearly 100%, with the largest net additions in the Permian, Israel, Canada, and the Gulf of Mexico. Higher prices lowered our share of proved reserves by over $100 million barrels of oil equivalent. 2022 production is expected to be flat to up 3% at $80 Brent. After adjusting for lower prices and portfolio changes, primarily the sale of our Eagle Ford asset and the expiration of a contract in Thailand, we expect production to grow, led by the Permian and other shale and tight assets. We remain confident in exceeding our long term production guidance.
Looking ahead to 2023, I'll call out a few items. Earnings estimates from first quarter refinery turnarounds are mostly driven by El Segundo. Based on the current outlook, we expect higher natural gas costs for our California refineries. Full year guidance for all other segment losses is lower this year due to higher expected interest income and again excludes special items such as pension settlement costs. The All Other segment can vary quarter to quarter and year to year.
We estimate annual affiliate dividends between $5 billion and $6 billion, depending primarily on commodity prices and margins. The difference between affiliate earnings and dividends is expected to be less than $2 billion. We do not expect a dividend from TCO in the first quarter. We updated our earning sensitivities. About 20% of the Brent sensitivity relates to oil linked LNG sales. Also, we expect to maintain share buybacks at the top end of our guidance range during the first quarter. Finally, as a reminder, in Venezuela, we use cost affiliate accounting, which means we will only record earnings if we receive cash. We do not record production or reserves.
2022 was a record year for Chevron in many ways. We look forward to the future, confident in our strategy. With a consistent objective to safely deliver higher returns and lower carbon. We'll share more during our Investor Day next month. Back to you, Roderick.