随着经济体制改革的深入，企业追求经济效益机制的启动，石油工业按原来计划经济体制下产业内部的分工格局（即经营石油的四大国家石油公司按上下游、产销贸纵向分段实行行政管理的体制）正在被逐步打破。各个石油公司都在立足于自身的条件制定发展战略。中国石油天然气总公司 With the deepening of the reform of the economic system and the pursuit of economic efficiency mechanisms by enterprises, the oil industry follows the original pattern of industrial division of labor within the planned economic system (ie, the four major oil companies operating the oil industry implement the administration according to the vertical and horizontal sections of the production, sales, and trade The management system) is being gradually broken down. Each oil company is developing its own development strategy based on its own conditions. China National Petroleum Corporation