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CNPC serves as China's largest producer and supplier of crude oil and natural gas, holding a dominant position in domestic petroleum production, processing, and marketing sectors. At the same time, CNPC is also a major producer and supplier of refined oil products and petrochemicals. As one of the largest service suppliers in the global petroleum and petrochemical industries, CNPC can provide operational services and technical support in such areas as geophysical prospecting, well drilling, logging, well testing, downhole operations, oilfield surface facilities construction, pipeline construction, refining and petrochemical projects, and manufacturing and supply of petroleum equipment.

CNPC ranked 9th among the world's top 50 petroleum companies by US Petroleum Intelligence Weekly in 2005, based on indices of oil and gas reserves, production, crude processing capacity, and sales of refined oil products. In 2005, the company rated 46th by the Fortune Global 500 in terms of sales revenues.

CNPC's registered total assets is 114.9 billion yuan, and its present total assets is 736.2 billion yuan. It has 14 large and giant oil and gas field enterprises, 14 large scale refining and petrochemical companies, 19 marketing companies and a large group of R&D units and technical service and mechanical manufacturing enterprise located in Northeast China, North China, Northwest China and Southwest China. By the end of 2004, there were 20 overseas exploration and production projects in 12 countries such as Sudan, Algeria, Ecuador, Nigeria, Chad, etc.

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