HONG KONG (S&P Global Ratings) April 3, 2018--S&P Global Ratings today said that its issuer credit rating on CNOOC Ltd. (A+/Stable/--) is not affected by the company's 2017 results. The results were in line with our expectations. CNOOC Ltd.'s debt-to-EBITDA ratio improved to 1.0x in 2017, from 1.5x in 2016. The improvement was slightly faster than our expectation due to increased production. The company's operating cash flow rose mainly due to higher oil prices while cash costs remained flat. CNOOC Ltd.'s total debt fell to Chinese renminbi (RMB) 132 billion at end-2017 from RMB150 billion at end-2016 and its total cash (including time deposits and wealth management products) rose to RMB102 billion from RMB83 billion over the period. We expect