水平井与直井交错井网优化方法

采用拟三维思想，利用保角变换方法，推导出一排水平井的平面势分布，在此基础上利用势叠加原理给出了水平井与直井交错注采井网条件下的产量公式。理论分析表明，该公式更适合于面积井网条件下水平井产能的计算。利用推导的水平井产能公式，引入2个重要的无因次量(水平井无因次长度和井网形状因子)对交错注采井网进行优化分析，得到在不同的井网面积条件下的水平井无因次长度与井网最优形状因子的关系式。结果表明，井网最优形状因子仅取决于水平井的无因次长度，而油层厚度和井网面积对其影响很小。在此基础上提出了不同条件下水平井井网的优化设计方法，为水平井在油田开发中的应用，特别是开发方案的设计提供了理论基础。图4参12

Optimization of the staggered well pattern of mixed horizontal and vertical wells

Using pseudo three-dimensional method and conformal transformation, the potential function of a row of horizontal wells is deduced, with the function and superposition principle method, an analytical solution of production for the rectangular mixed well pattern is given. Well pattern optimization analysis is carried out by introducing 2 dimensionless parameters, dimensionless shape factor and dimensionless horizontal length, and the relationship between the dimensionless horizontal length and optimum shape factor is derived. The results show that the optimum shape factor is dependent on the dimensionless horizontal length, and the pattern area and formation thickness have little effect on it, based on which the optimization designing methods for horizontal well pattern are provided.