Willie Chiang
Analyst · Bernstein
Thank you, Roy. Good afternoon, and thank you all for joining us.
Today, we announced second quarter results above our expectations, reflecting continued execution of our long-term goals and initiatives as well as strength in both of our crude and NGL segments. In summary, second quarter adjusted EBITDA attributable to PAA was $615 million. We increased our full year 2022 adjusted EBITDA guidance by $100 million to plus or minus $2.375 billion, which is $175 million above our initial February guidance. This was driven by outperformance in both of our NGL and crude oil segments due to higher volumes and higher commodity prices. As a result, we now expect to achieve the midpoint of our leverage target range of 4.0x by year-end 2022.
In regards to buybacks, we repurchased approximately $50 million of common units during the quarter, bringing our year-to-date repurchases to approximately $75 million and total repurchases of $300 million since the program inception.
Additionally, we're increasing our 2022 asset sales target by $100 million as a result of greater clarity on asset sales that we anticipate to complete during the balance of the year. Al will provide more detail on our quarterly results and our full year outlook in his portion of the call.
As highlighted on Slide 4 and 5, the overall fundamentals of our business remain constructive as North American shale remains keen in meeting global energy demand. Current activity levels in the Permian are running roughly 10% ahead of our forecasts, and we expect to see between 650,000 and 700,000 barrels a day of production growth exit to exit during 2022.
Our operating leverage and integrated business model with large-scale supply aggregation, quality segregation, flow assurance and access to multiple markets has positioned us well to support increasing producer activity levels.
Both our crude and NGL systems have meaningful capacity to grow alongside of the needs of our customers for the next number of years, and we are well positioned to capture incremental volumes with minimal capital investment.
At the beginning of July, our Permian gathering JV closed on a bolt-on acquisition for the remaining 50% ownership interest of the Advantage Pipeline for approximately $65 million or $42 million net to Plains interest plus customary closing costs. The negotiated transaction provides the JV additional operational, commercial and capital synergies at an attractive multiple. The acquisition costs associated with this bolt-on opportunity are more than offset by the incremental proceeds expected from the previously mentioned increase in 2022 asset sales.
In our NGL segment, we continue to advance capital-efficient optimization and debottlenecking opportunities at our existing facilities. Furthermore, we expect growing Western Canadian gas production to drive incremental gas order flow volumes towards our strategically located Empress facility.
With regard to our financial strategy, we expect to continue to generate significant free cash flow over the next number of years. And we intend to allocate this cash in a manner that takes into account the progress that we've made to date on our leverage while increasing cash return to equity holders through distribution growth and opportunistic buybacks as well as continuing to make disciplined capital investments.
As I noted in my opening remarks, we've made significant progress in strengthening our balance sheet. We entered the year with leverage at 4.5x and with the expectation of finishing 2022 at the high end of our target or 4.25x. We now expect to exit the year at the midpoint of our target, which is 4.0x. The improved trajectory allows us to further accelerate our goal of increasing return of capital to our unitholders over the coming years.
Before turning the call over to Al, I'd like to mention that we published our 2021 sustainability report last week. As reflected on Slide 25 of the appendix, we've made continuous improvements in our emissions and advanced sustainability in many areas of the company. We're proud of these achievements, and we look forward to continuing the dialogue with many of you on our sustainability performance.
With that, I'll turn the call over to you, Al.