在其他作者提出的计算极限井网密度单井极限控制储量方法的基础上，提出了一种计算极限井网密度的新方法（修正的单井极限控制储量法）。新方法不但考虑了开发总投资及其利息，而且考虑了主开发期内逐年原油销售收入及其利息、逐年操作费用及其利息。实例计算结果和与其他方法对比结果表明，新方法是合理的。 Based on the calculation method of single well limit control reserves of ultimate well density proposed by other authors, a new method to calculate ultimate well density (modified single well limit control reserve method) is proposed. The new method takes into account not only the total investment for development and its interest, but also the annual sales revenue of crude oil and its interest, year-on-year operating costs and interest thereon in the main development period. The results of example calculation and comparison with other methods show that the new method is reasonable.