This paper derivates a method for calculating reasonable well spacing density of low permeable reservoirs through economic evaluation considering drilling investment, surface investment and oil sale income, and the interest of the three.

• 基于前苏联学者谢尔卡乔夫提出的计算最终采收率公式,并应用最小二乘法对井网密度常数进行回归,通过经济评价,综合考虑钻井投资、面投资和原油销售收入以及三者的利息,推导出一种计算低渗透油藏合理井网密度的方法,并编写计算机程序得出结果,提高了预测精度,减小了运算误差。