** Shares of Canadian oil and gas producer rise 1.8% to C$18.00
** Co updates 5-yr plan with increased focus on generating surplus cash flow ** TOU sees aggregate free cash flow rising by about C$840 mln ($621.85 mln) to a total of about C$3.05 bln over 5 years ** Co's new plan maintains annual production guidance at 300,000 boe/d in 2019, growing to 377,000 boe/d in 2023 ** BMO raises rating to "outperform", maintains PT of C$23 ** 13 brokerages rate the stock "buy" or higher; their median PT is C$27.50 ** Shares of the company have climbed 5.3% YTD (Reporting by Shradha Singh in Bengaluru)