The analyst rating for CNOOC (00883.HK) is a "Buy" with a target price of HKD24. This rating is based on the company's reported 3Q net profit being in line with expectations, achieving 76% of its full-year forecast despite a slight decline in production and a one-time negative impact. Additionally, the management's confidence in reaching the upper limit of the annual production guidance and the record high total production for the first three quarters support the positive outlook. However, the broker anticipates a potential decline in profit in 4Q due to falling oil prices.